BCS Cryptography & Encryption
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What is the protocol suite that employs the following three protocols?
a) Authentication Headers (AH).
b) Encapsulating Security Payload (ESP).
c) Security Associations (SAs). - CORRECT ANSWER✔✔- IPsec
Which two of the following are certificates used for?
a) Client authentication.
b) WEP encryption.
c) Access control lists.
d) Password hashing. - CORRECT ANSWER✔✔- A and D.
Non-repudiation is a feature of cryptography that can be implemented using what? -
CORRECT ANSWER✔✔- Digital Signature.
A collision attack on MD5 attempts to find what? - CORRECT ANSWER✔✔- Two
messages that will produce identical hashes.
Entropy in a computer system may be used for what purpose? - CORRECT ANSWER✔✔-
To create session keys.
, A simple substitution cipher changes each plaintext symbol in what manner? - CORRECT
ANSWER✔✔- It employs a one-to-one correspondence table.
What describes a situation when a cryptographic key
component is held by a third party? - CORRECT ANSWER✔✔- Key escrow.
A way of verifying both the sender of information and the integrity of a message is using
what? - CORRECT ANSWER✔✔- Digital signatures.
Why would a user check that a software patch is CORRECTLY signed by the software
publisher? - CORRECT ANSWER✔✔- To ensure that it is a legitimate patch issued by the
correct party.
What is the CORRECT description of ciphers? - CORRECT ANSWER✔✔- Stream ciphers
encrypt continuous streams of data.
Voice privacy in Global System for Mobile Communication (GSM) cellular telephone
protocol is provided by which cipher? - CORRECT ANSWER✔✔- A5/2.
What is a downside of data cryptography on an open source? - CORRECT ANSWER✔✔-
The data storage is dependent on a service that may have been poorly tested
and possibly not work.
What is TRUE, in a block cipher? - CORRECT ANSWER✔✔- The same key is used to
encrypt each of the blocks.
UPDATED ACTUAL Exam Questions and
CORRECT Answers
What is the protocol suite that employs the following three protocols?
a) Authentication Headers (AH).
b) Encapsulating Security Payload (ESP).
c) Security Associations (SAs). - CORRECT ANSWER✔✔- IPsec
Which two of the following are certificates used for?
a) Client authentication.
b) WEP encryption.
c) Access control lists.
d) Password hashing. - CORRECT ANSWER✔✔- A and D.
Non-repudiation is a feature of cryptography that can be implemented using what? -
CORRECT ANSWER✔✔- Digital Signature.
A collision attack on MD5 attempts to find what? - CORRECT ANSWER✔✔- Two
messages that will produce identical hashes.
Entropy in a computer system may be used for what purpose? - CORRECT ANSWER✔✔-
To create session keys.
, A simple substitution cipher changes each plaintext symbol in what manner? - CORRECT
ANSWER✔✔- It employs a one-to-one correspondence table.
What describes a situation when a cryptographic key
component is held by a third party? - CORRECT ANSWER✔✔- Key escrow.
A way of verifying both the sender of information and the integrity of a message is using
what? - CORRECT ANSWER✔✔- Digital signatures.
Why would a user check that a software patch is CORRECTLY signed by the software
publisher? - CORRECT ANSWER✔✔- To ensure that it is a legitimate patch issued by the
correct party.
What is the CORRECT description of ciphers? - CORRECT ANSWER✔✔- Stream ciphers
encrypt continuous streams of data.
Voice privacy in Global System for Mobile Communication (GSM) cellular telephone
protocol is provided by which cipher? - CORRECT ANSWER✔✔- A5/2.
What is a downside of data cryptography on an open source? - CORRECT ANSWER✔✔-
The data storage is dependent on a service that may have been poorly tested
and possibly not work.
What is TRUE, in a block cipher? - CORRECT ANSWER✔✔- The same key is used to
encrypt each of the blocks.
