Cryptography

Question 1

Which of the following is a simple method used in symmetric key cryptography to ensure message integrity?

Checksums
Message digest

Answer 1

Checksums are simple error detecting codes and are used in symmetric key cryptography to ensure message integrity. The checksum is created and appended to a message. The receiver will decrypt the message and generate their own checksum to verify the integrity of the message.

Question 2

Definition of a Digital signature

Hash Value encrypted with a senders key
Hash Value encrypted with a receivers key

Answer 2

Hash Value encrypted with a senders key

Question 3

____ are simple error detecting codes and are used in symmetric key cryptography to ensure message integrity. The _____is created and appended to a message. The receiver will decrypt the message and generate their own _____ to verify the integrity of the message.

Checksums
Message digest

Answer 3

Checksums

Question 4

Hashing equals integrity

True
False

Answer 4

True