ISEC312_UGQ3_S51

___________ is vulnerable to cut-and-paste attacks.

• Electronic Codebook Book

• Cipher Block Chaining

• Cipher FeedBack

• Output FeedBack

"The encryption sequence should have a short period, the longer the period of repeat the more difficult it will be to do cryptanalysis." is the design consideration of Stream Cipher.

• True

• False

____________ does provide a degree of authentication.

• link encryption

• end-to-end encryption

The strength of any cryptographic system depends on the key distribution technique.

• True

• False

Is 1787 a prime?

• Yes

• No

What is the value of pi(97654)?

Find the result of 15^173 mod 43

Find the result of 12^-1 mod 61.

Find the result of 4^10 mod 260.

Find the result of 17^-1 mod 160.