Free CREST CREST-CPSA Exam Questions

Become CREST Certified with updated CREST-CPSA exam questions and correct answers

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Total 359 Questions | Updated On: Aug 03, 2026

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Question 1

In CBC mode, how is each plaintext block encrypted before being XORed with the previous ciphertext block?

A : XORing each plaintext block with the previous ciphertext block before encryption

B : Using a cryptographic nonce as the encryption key

C : Using a unique initialization vector (IV) for each block

D : Using a different key for each block

E : Using the same encryption key for each block

Answer: E

Question 2

In UDP communication, why is stream encryption often preferred over block encryption?

A : Stream encryption is faster and more efficient for real-time data streams

B : Block encryption is not compatible with the connectionless nature of UDP

C : Stream encryption provides better resistance to cryptographic attacks

D : Block encryption requires a reliable connection for synchronization

E : Stream encryption requires less computational power

Answer: A

Question 3

What is the definition of JSP?

A : Java Secure Pages

B : Java Server Pages

C : Java Servlet Pages

D : Java Security Pages

E : Java System Pages

Answer: B

Question 4

In CBC mode, how is each plaintext block encrypted before being XORed with the previous ciphertext block?

A : XORing each plaintext block with the previous ciphertext block before encryption

B : Using a cryptographic nonce as the encryption key

C : Using a unique initialization vector (IV) for each block

D : Using a different key for each block

E : Using the same encryption key for each block

Answer: E

Question 5

What is a CNAME?

A : Maps an IP to domain.

B : Maps a hostname to hostname.

C : Maps a domain to a hostname.

D : Maps an IP to a hostname.

E : Maps a domain to an IP.

Answer: B

Page: 1 / 72

Total 359 Questions | Updated On: Aug 03, 2026

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