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SSCP EXAM PREP: 2025–2026 LATEST PRACTICE
QUESTIONS WITH MOST TESTED QUESTIONS
(HARVARD STYLE)
Is the term used in business continuity to identify the maximum targeted period in which data can be
lost without severely impacting the recovery of operations
...
The acceptable data loss in case of a disruption of
operations
...

RTO
RPO
MTD
MTO
RPO

Is a term used in business continuity to identify the planned recovery time for a process or system
which should occur before reaching the business process's maximum tolerable downtime
...
Sets the objective
of the time period for the business continuity solutions to transit to normal mode
RTO
RPO
MTD
MTO/MAO
MTO - Max tolerable outage
...


What type of inbound packet is characteristic of a ping flood attack?
ICMP echo reply
ICMP route changed
ICMP echo request
ICMP destination unreachable
ICMP echo request

Bill implemented RAID level 5 on a server that he operates using a total of three disks
...
Which one of the
following requirements is not necessary for her to trust the digital certificate?
She verifies that the certificate is not listed on a CRL
...

She trusts the certificate authority
...


Alison is examining a digital certificate presented to her by her bank’s website
...


James has opted to implement a NAC solution that uses a post-admission philosophy for its control
of network connectivity
...
A user approaches him and explains that
he needs access to the human resources database to complete a headcount analysis requested by
the CFO
...


Pedro takes immediate action to override this, preventing contamination of the city’s drinking water
...
What is his best option to
secure these systems?
Install patches for those services
...

Turn off the services for each appliance
...

Place a network firewall between the devices and the rest of the network
...

An organization that provides a secure channel for receiving reports about suspected security
incidents
...

An organization that coordinates and supports the response to security incidents
...


Which statement best describes the two forms of analytics commonly used?
Pattern matching and behavioral analysis
Machine learning and Bayesian analysis
Glass box and hidden methods

Predictive and descriptive
Predictive and descriptive

Which one of the following metrics specifies the amount of time that business continuity planners
find acceptable for the restoration of service after a disaster?
RTO
RPO
MTD
MTO
RTO

T or F: Criminal cases have the highest forensic standards
...
What type of design should he
use, and how many firewalls does he need? (DMZ, Database, and Priv-Net) = 3 tiers
...


Determine asset value
...


Derive the annualized loss expectancy
...


Which of the following is not a component of a Operations Security "triples"?

Vulnerability

Threat

Risk

Asset

Risk

The COVID-19 pandemic caused many organizations to substantially increase the percentage of their
employees that worked remotely (from home or other locations)
...


Ensure that each remote work location had suitable backup power and connectivity
...


More thorough enforcement of appropriate use policies and restrictions for endpoints and network
access used by these employees
...


Ensure that each remote work location had suitable backup power and connectivity
...


Cloud-based services that broker identity and access management functions
...


Encrypt the data files and send them
...


Use full disk encryption at A and E, and use SSL at B and D
...


As part of her malware analysis process, Caitlyn diagrams the high-level functions and processes that
the malware uses to accomplish its goals
...

What security issue could this create, and what solution would help?

Denial-of-service attacks; use a firewall between networks
...


Caller ID spoofing; MAC filtering

VLAN hopping; use encryption
...


Which of the following would be LESS likely to prevent an employee from reporting an incident?

They are afraid of being pulled into something they don't want to be involved with
...


They are afraid of being accused of something they didn't do
...


The process of reporting incidents is centralized
...
One of the senior
managers has just watched some cybercrime webinars and as a result has asked you to look into
implementing a full set of DNSSEC measures
...


Since DNSSEC is for the Internet organizations that run the network and DNS infrastructures, there's
really nothing in it that applies to our company
...


You'll develop a plan and proposal to implement these in the organization's web servers and internal
network management systems
...


What is the input that controls the operation of the cryptographic algorithm

Decoder wheel

Cryptovariable (aka key)

Cryptographic routine

Encoder

Cryptovariable (aka key)

Karen’s organization has been performing system backups for years but has not used the backups
frequently
...
Which of the following options should
Karen avoid when selecting ways to ensure that her organization’s backups will work next time?

MTD verification

Hashing

Periodic testing

Log review

MTD verification

When working to restore systems to their original configuration after a long-term APT compromise,
Charles has three options:

1
...


2
...


3
...


Option 2: He can rebuild and patch the system using the original installation media and application
software and his organization's build documentation
...
Why might Ben disable SSID broadcast, and
how could his SSID be discovered?

Disabling SSID broadcast helps avoid SSID conflicts
...


Disabling SSID broadcast prevents attackers from discovering the encryption key
...


Disabling SSID broadcast prevents issues with beacon frames
...


Disabling SSID broadcast hides networks from unauthorized personnel
...


Disabling SSID broadcast hides networks from unauthorized personnel
...


You are the CISO for a major hospital system and are preparing to sign a contract with a software as a
service (SaaS) email vendor and want to ensure that its business continuity planning measures are
reasonable
...
Each
time she changed positions, she gained new privileges associated with that position, but no
privileges were ever taken away
...


Vulnerability management informs the planning and conduct of continuous assessment, the results
of which are used as updates to vulnerability management
...


There is no direct link between these two sets of processes; rather, they come together via
continuous monitoring
...


Glenda would like to conduct a disaster recovery test and is seeking a test that will allow a review of
the plan with no disruption to normal information system activities and as minimal a commitment of
time as possible
...
What files does he need to conduct this analysis?

/etc/user and /etc/account

/etc/shadow and /etc/user

/etc/passwd and /etc/shadow

/etc/passwd and /etc/user

/etc/passwd and /etc/shadow

What type of fire extinguisher is useful against liquid-based fires?

Class A

Class B

Class C

Class D

Class B
A-Dry
B-Wet

C-Electrical
D-Metals

If Susan’s organization requires her to log in with her username, a PIN, a password, and a retina scan,
how many distinct authentication factor types has she used?

One

Three

Two

Four

Two -Something she knows, something you are

Factors are (i) something you know (e
...
, password/personal identification number); (ii) something
you have (e
...
, cryptographic identification device, token); and (iii) something you are (e
...
,
biometric)
...

Which of the following would be most suitable for that purpose?

HIDS

NIDS

HIPS

NIPS

HIPS

As Lauren prepares her organization’s security practices and policies, she wants to address as many
threat vectors as she can using an awareness program
...
Their systems are reporting a dramatic
increase in customer complaints about charges the merchant has made to their accounts for orders
that the customers say they have never made
...


Workflow management systems, and their playbooks, make sense only for organizations with
established, well-practiced procedures
...


Workflows and playbooks can be part of major applications platforms and may support security
functions in those platforms, but provide no useful capability for network or systems security
...


When attempting to establish Liability, which of the following would be describe as performing the
ongoing maintenance necessary to keep something in proper working order, updated, effective, or to
abide by what is commonly expected in a situation?

Due care

Due concern

Due diligence

Due practice

Due care - keep in working order
...
Which of the following would be most
appropriate for that purpose?

Cold site

Warm site

Mobile site

Hot site

Hot Site

Darcy is a computer security specialist who is assisting with the prosecution of a hacker
...
What type of evidence is Darcy being
asked to provide?

Documentary evidence

Real evidence

Direct evidence

Expert opinion

Expert opinion

Which of the following item would best help an organization to gain a common understanding of
functions that are critical to its survival?

A disaster recovery plan

A business impact analysis

A risk assessment

A business assessment

A business impact analysis

A security evaluation report and an accreditation statement are produced in which of the following
phases of the system development life cycle?

project initiation and planning phase

acceptance phase

system design specification phase

development & documentation phase

acceptance phase

A cloud service can be accessed through a variety of operating systems
...
He immediately applied the patch and is sure that it
installed properly, but the vulnerability scanner has continued to incorrectly flag the system as
vulnerable because of the version number it is finding even though Jim is sure the patch is installed
...


Review the vulnerability report and use alternate remediation options
...


Update the version information in the web server’s configuration
...


George is assisting a prosecutor with a case against a hacker who attempted to break into the
computer systems at George’s company
...

What rule of evidence requires George’s testimony?

Testimonial evidence rule

Parol evidence rule

Best evidence rule

Hearsay rule - out of court statements, inability to cross examine
...

How a person acted under the particular set of circumstances at issue
True

Due ________ means taking reasonable steps to secure and protect your company's assets,
reputation, and finances
...
Once he is done, he patches the
machine fully and applies his organization’s security templates before reconnecting the system to the
network
...
Where should Charles look for the malware
that is causing this behavior?

The installation media

The system memory

The system BIOS or firmware

The operating system partition

The installation media

Which statement or statements about ports and the Internet is not correct?(Choose all that apply
...


Standardized port assignments cannot be changed, or things won't work right, but they can be
mapped to other port numbers by the protocol stacks on senders' and recipients' systems
...


Many modern devices, such as those using Android, cannot support ports, and so apps have to be
redesigned to use alternate service connection strategies
...


Using port numbers as part of addressing and routing was necessary during the early days of the
Internet, largely because of the small size of the address field, but IPv6 makes most port usage
obsolete
...
What type of cloud computing
service is in use?

PaaS

IaaS

SaaS

CaaS

IaaS

What might be the best reason for a business case be able to use a short payback period, rather than
a longer one, as part of its argument?

Most people, managers and leaders included, cannot make meaningful predictions too far into the
future; the shorter the payback period, the more they will perceive the proposed change as being
valuable
...


None of the above
...


Most people, managers and leaders included, cannot make meaningful predictions too far into the
future; the shorter the payback period, the more they will perceive the proposed change as being
valuable
...


Both approaches provide about the same overall security and compliance results, but one may be
better suited to the organization's management culture and processes
...


Performing these tasks continuously will probably cost more in the long run, while providing only a
narrow, incremental view as to whether security controls are working properly
...


A cloud-based service that provides account provisioning, management, authentication,
authorization, reporting, and monitoring capabilities is known as what type of service?

PaaS

SaaS

IDaaS

IaaS

IDaaS

Angela is an information security architect at a bank and has been assigned to ensure that
transactions are secure as they traverse the network
...

What threat is she most likely attempting to stop, and what method is she using to protect against it?

Sniffing, encryption

Packet injection, encryption

Man-in-the-middle, VPN

Sniffing, TEMPEST

Sniffing, encryption

What is RAD?

A development methodology

A project management technique

Risk-assessment diagramming

A measure of system complexity

A development methodology

Due diligence means which of the following?

(person's actions)

Pay your debts completely, on time
...


Do what you have to do to fulfill your responsibilities
...


Make sure that actions you've taken to fulfill your responsibilities are working correctly and
completely
...


In bare-metal virtualization, the host operating system and guest operating system platforms must be
consistent
...
g
...


In bare-metal virtualization, all guest operating systems must be the same version
...


Alex has access to B, C, and D
...


The provisioning process did not give him the rights he needs
...


He has excessive privileges
...


TCP operates on what level of the OSI?

PDNTSPA
L4

What port does PPTP use?
1701
1700
1723
1799
1723

uses mutual authentication, where the client authenticates to the server and the server
authenticates to the client:

PAP
CHAP
MS-CHAPv2
MS-CHAP
MS-CHAPv2

RADIUS is an acronym for:
Remote Authentication Dial-in User Service
...


SYN
SMURF
LAND
ICMP
SYN

In a ___________ attack tricks a system into sending out packets to itself in an endless loop
...

SYN
SMURF
LAND
ICMP
LAND

______________ attack, an attacker performs many minor actions that likely won't be noticed or
reported but collectively can add up to big gains
...


Bread
Peanut Butter
Salami
Jam

Salami

A _____________ attack broadcasts ICMP ping packets to multiple computers on a network but
spoofs the source address using the IP address of the attacked system
...


SYN Attack
Salami
Smurf
Fraggle
Fraggle

Applications use input validation to check user input before using the data
...

True

Input validation and stored procedures help prevent ______________ _________ attacks
...

False, it's a Cross Site Forger Request

If attackers are interested in money, they may try to target a bank
...
This is a _______________
attack?

Phishing
Smishing
Spear phishing
Taco Cat
Spear phishing - because the attack is targeted to a company

Does WPS have a lockout feature when trying to brute force attack the PIN
No, it does not making WPS vulnerable to attacks
...
Zombies are each computer
...
· A port scan attempts to discover what ports are open on a
single system
...

True

A website is preventing users from entering the < and > characters when they enter data
...


Spear Phishing
Smishing
Phishing
Phishing

A user connected to a free wireless network at a coffee shop to access Facebook
...
What is the most likely cause of this?

Evil Twin, a type of MITM attack
War Driving
Encryption Hack

Evil Twin, a type of MITM attack

T or F: A virus can only run with some type of user interaction
...


An virus uses code to make it difficult for AV researchers to reverse-engineer the code
...


Armored
Polymorphic
Multipartite
Armored

_____________ viruses use techniques such as complex code and encryption to prevent a researcher
from reverse engineering the code and discovering what the virus is doing
...

Armored, Polymorphic, Metamorphic

A T___________ H_________ appears to be one thing but is actually something different
...
These usually install a RAT
...
Attackers use malicious mobile code to install malware from remote
servers via the Internet
...

True

ISO 31000 Risk management Steps:
DIEII
Design
Implementations
Evaluation
Improvement
Integration

A risk _________________ looks at risks at a specific time
...
Organizations repeat risk assessments periodically to ensure that current risks are
assessed
...
The SLE is $2,000 and the ARO is 20
...
The control is less than the ALE
...
The control exceeds the ALE
...
The control exceeds the ARO
...
The control is less than the ARO
...


You are completing a risk assessment and using historical data
...

What is the ARO?
A
...
$5,000
C
...
Impossible to determine with the information provided
A
...
The single loss expectancy (single loss exp
...


Of the following choices, what best represents all of the steps related to incident response?
A
...
Preparation, detection, analysis, containment, eradication, and recovery
C
...
Containment, analysis, detection, eradication, and recovery
B
...
Containment is important once an incident has been detected and
analyzed, but can't be done beforehand
...
If
the ENV is modified, you must update the baseline or you might get warnings
...
Any logs on a local system should be treated with suspicion because the attacker
may have modified them
...
A
S_______________-based IDS detects attacks by comparing network activity with a database of
known attack methods
...

Grey - because an external company is doing it
...

detective

Two significant risks related to USB devices are __________ and infection with _____________
...


Is an audit log is a deterrent security control because it identifies events either as they are occurring
or after they've occurred
...
When logs record specific user actions, users are unable to deny
they took an action
...


A network administrator is considering placing a new firewall at the network perimeter
...
Which principle states that the individual should have the right to
receive personal information concerning himself or herself and share it with another data controller?

Data portability

Onward transfer

Enforcement

Data integrity

Data integrity

Which one of the following is an example of a nondiscretionary access control system?

MAC

File ACLs

DAC

Visitor list

MAC

T or F: Tim needs to lock down a Windows workstation that has recently been scanned using nmap
with the results shown here
...
No ports should be open!

True

Which of the following strategies is not a reasonable approach for remediating a vulnerability
identified by a vulnerability scanner?

Install a patch
...


Use an application layer firewall or IPS to prevent attacks against the identified vulnerability
...


Update the banner or version number
...
What component of IPsec provides this capability?

ISAKMP

AH

IKE

ESP

ESP

Which of the following steps should be one of the first step performed in a Business Impact Analysis
(BIA)?

Estimate the Recovery Time Objectives (RTO)
...


Evaluate the impact of disruptive events

Identify all CRITICAL business units within the organization
...
If
Kathleen wants to identify rogue devices on her wired network, which of the following solutions will
quickly provide the most accurate information?

Router and switch-based MAC address reporting

Physical survey

Reviewing a central administration tool, such as SCCM

Discovery scan with a port scanner

Router and switch-based MAC address reporting

Which of the following is not a component of a Operations Security "triples"?

Asset

Risk

Vulnerability

Threat

Risk

Ed has been tasked with identifying a service that will provide a low-latency, high- performance, and
high-availability way to host content for his employer
...


Web server traffic is not subjected to stateful inspection
...


VPN users will not be able to access the web server
...


Which of the following statements pertaining to the maintenance of an IT contingency plan is
incorrect?

Copies of the plan should be provided to recovery personnel for storage offline at home and office
...


The Contingency Planning Coordinator should make sure that every employee gets an up-todate
copy of the plan
...


The Contingency Planning Coordinator should make sure that every employee gets an up-to-date
copy of the plan
...


Use a host antivirus
...


Use a next-generation firewall on the host
...


Dejah is a student at the local community college
...
Curious, she browses to some of those IP
addresses and is presented with device and server login screens; in one case, an address presents
her with what looks to be a command-line interface login prompt
...
The company has 1,000
employees, and they plan to use an asymmetric encryption system
...
If
the confidentiality of the messages is not critical, what solution should Fred suggest?

Use TLS to protect messages, ensuring their integrity
...


Digitally sign but don’t encrypt all messages
...


Digitally sign but don't encrypt all messages
...
If a
penetration tester is able to modify audit logs, what STRIDE categories best describe this issue?

Tampering and information disclosure

Repudiation and tampering

Elevation of privilege and tampering

Repudiation and denial of service

Repudiation and tampering

Lucca wants to prevent workstations on his network from attacking each other
...
He must
facilitate communication between any two employees within the organization
...
Which one of the following key lengths is not both supported by the RSA
algorithm and generally considered secure? (is not supported, not safe)

2,048 bits

512 bits

4,096 bits

1,024 bits

512 bits is not safe

What should be true for salts used in password hashes?

Unique salts should be stored for each user
...


A single salt should be set so passwords can be de-hashed as needed
...


Unique salts should be stored for each user
...
If she wants to conduct a realistic attack as part of a
penetration test, what type of penetration test should she conduct?

Crystal box

Gray box

White box

Black box

Black Box

Which of the following floors would be most appropriate to locate information processing facilities in
a 6-stories building?

Basement

Third floor

Sixth floor

Ground floor

Third Floor - You want the middle
...


Security categorization groups together information types that have comparable loss or impacts if
compromised, along with any compliance-required security protection requirements for that type of
data
...


Security categorization is a process that determines possible loss or impact if information of a given
type is disclosed to an unauthorized person or entity
...


Which of the following is not a single sign-on implementation?

Kerberos

RADIUS - remote authentication services

ADFS

CAS

RADIUS - remote authentication services

Which component of IPsec provides authentication, integrity, and nonrepudiation?

Encryption Security Header

L2TP

Authentication Header

Encapsulating Security Payload

Authentication Header-The AH provides integrity, authentication, and non-repudiation
...
Which one of these technologies should she
replace because it is no longer considered secure?

WPA2

3DES

MD5

PGP

MD5

Max is the security administrator for an organization that uses a remote access VPN
...

Which one of the following hash functions is the strongest cryptographic hash protocol supported by
RADIUS?

SHA-512

HMAC

SHA 2

MD5

MD5-because RADIUS sucks
...


TCP/IP provides only concepts and theories, whereas network hardware and systems are built using
the OSI reference model
...


Network hardware and systems are built on TCP/IP, whereas the OSI reference model provides only
concepts and theories

Hardware and systems are built using both models, and both models are vital to threat assessment
and network security
...
The remaining roles have valid
reasons
...


During a port scan, Susan discovers a system running services on TCP and UDP 137-139 (netbios) and
TCP 445 (SMB), as well as TCP 1433
...
What security control would provide the strongest defense against these
attacks?

Intrusion detection system

Vulnerability scanning

Parameter checking

Firewall

Parameter checking

Which of the following would be used for a new certificate registration request?

OCSP

WOT

RA

CRL

RA

When implementing an MD5 solution, what randomizing cryptographic function should be used to
help avoid collisions

Message pad

Salt

Modular addition

Multistring concatenation

Salt

Which of the following does not describe data in motion?

Data in a TCP packet

Data in files being copied between locations

Data on a backup tape that is being shipped to a storage facility

Data in an e-commerce transaction

Data in a TCP packet

A forensic investigator needs to capture data for later analysis
...


Think open/close connection of ports
...
What type of analysis is he performing?

Media analysis

Network analysis

Software analysis

Hardware analysis

Software analysis

Which one of the following tasks is performed by a forensic disk controller?

Transmitting write commands to the storage device

Preventing data from being returned by a read operation sent to the device

Masking error conditions reported by the storage device

Intercepting and modifying or discarding commands sent to the storage device

Intercepting and modifying or discarding commands sent to the storage device

Which of the following is best described as an access control model that focuses on subjects and
identifies the objects that each subject can access?

A capability table

A rights management matrix (object based)

An access control list

An implicit denial list

A capability table

All following observations about IPSec are correct except:

Default Hashing protocols are HMAC-MD5 or HMAC-SHA-1

Default Encryption protocol is Cipher Block Chaining mode DES, but other algorithms like ECC (Elliptic
curve cryptosystem) can be used

Works only with Secret Key Cryptography

Support two communication modes - Tunnel mode and Transport mode

Works only with Secret Key Cryptography - it uses both symmetric and asymmetrical keys
...
What type of detection
method should she look for in her selected tool?

Availability-based

Signature-based

Trend-based

Heuristic-based

Heuristic-based

Chris is conducting a risk assessment for his organization and has determined the amount of damage
that a single flood could be expected to cause to his facilities
...


ALE Annual Lost Exposure

AV Asset Value

SLE

Which of the following usually provides reliable, real-time information without consuming network
or host resources?

network-based IDS

host-based IDS

application-based IDS

firewall-based IDS

network-based IDS

Which of the following questions is less likely to help in assessing physical and environmental
protection?

Is physical access to data transmission lines controlled?

Are entry codes changed periodically?

Are appropriate fire suppression and prevention devices installed and working?

Are there processes to ensure that unauthorized individuals cannot read, copy, alter, or steal printed
or electronic information?

Are there processes to ensure that unauthorized individuals cannot read, copy, alter, or steal printed
or electronic information?

Susan has discovered that the smart card–based locks used to keep the facility she works at secure
are not effective because staff members are propping the doors open
...


What type of controls has she put into place?

Recovery

Administrative

Compensation

Physical

Compensating - We are compensating for existing controls
...
What type of analysis has Angela performed?

Dynamic code analysis

Interactive behavior analysis

Manual code reversing

Static property analysis

Interactive behavior analysis

Alex is preparing to solicit bids for a penetration test of his company’s network and systems
...
What type of
penetration test should he require in his bidding process?

Gray box

Zero box

Crystal box

Black box

Crystal Box or White Box - Sometimes referred to as crystal-box testing, white-box is so-called as the
tester gets to see everything pretty clearly
...

That means that 45 minutes is the:

BIA

RPO

MAO

DRP

MAO-Maximum Acceptable Outage or MAO

Which of the following is less likely to be included in the change control sub-phase of the
maintenance phase of a software product?

Establishing the priorities of requests

Determining the interface that is presented to the user

Estimating the cost of the changes requested

Recreating and analyzing the problem

Estimating the cost of the changes requested

The company that Dan works for has recently migrated to a Service as a Service provider for its
enterprise resource planning (ERP) software
...


What will Dan most likely have to do in this new environment?

Use a different scanning tool
...


Engage a third-party tester
...


Rely on vendor testing and audits
...


Why is allowed listing a better approach to applications security than blocked listing?Choose the
most correct statement
...


Administering an allowed listing system can require a lot of effort, but when an unknown program is
trying to execute (or be installed), you know it is not yet trusted and can prevent harm
...


Allowed listing depends on government-certified lists of trusted software providers, whereas blocked
listing needs to recognize patterns of malicious code behavior, or malware signatures, to block the
malware from being installed and executed
...


Which one of the following is not a valid key length for the Advanced Encryption Standard?

192 bits

256 bits

128 bits

384 bits

384 bits 128, 192,256

We have an expert-written solution to this problem!
During a penetration test, Lauren is asked to test the organization’s Bluetooth security
...


Bluetooth scanning can be time-consuming
...


Bluetooth active scans can’t evaluate the security mode of Bluetooth devices
...


Machine learning, analytics, and other artificial intelligence techniques are often not trusted very
much by business and organizational managers and leaders
...


Always use them in a dual control process requiring trained human approval before action is taken
...


Ensure that managers and leaders understand the mathematics and logical processes used by these
tools
...


The information security staff's participation in which of the following system development life cycle
phases provides maximum benefit to the organization?

development and documentation phase

in parallel with every phase throughout the project (always secure)

system design specifications phase

project initiation and planning phase

in parallel with every phase throughout the project

Which statement correctly describes why CVE data should be part of your vulnerability assessments?

:

Since the vast majority of systems in use are based on Windows, if your business does not use
Windows platforms you can probably avoid the expense of investigating CVE for vulnerability
information
...
Once these obvious vulnerabilities have
been mitigated, a more complete vulnerability assessment should be done
...


It should provide most if not all of the vulnerability information you need to implement risk
mitigation
...


What's the least secure way to authenticate device identity prior to authorizing it to connect to the
network?

Devices don't authenticate, but the people using them do
...


Verifying that the device meets system policy constraints as to software and malware updates
...


Devices don't authenticate, but the people using them do
...
He first performs a frequency analysis and notes that the frequency of letters in
the message closely matches the distribution of letters in the English language
...


AES

Transp



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