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33
votes
2answers
63k views

Security comparsion of 3DES and AES

Which one is more secure and least possible to be broken through cryptanalysis AES or 3DES (no matter performance)? I need to use encryption for my projects to store and secure sensitive information ...
2
votes
1answer
955 views

Understanding Key Serial Numbers (KSN) in Derived Unique Key Per Transaction (DUKPT)

I have a number of questions regarding Key Serial Numbers (KSNs) in DUKPT: KSNs are 8 - 10 bytes long. Older implementation are 8 bytes whereas newer ones are 10 bytes. Do I risk being incompatible ...
4
votes
2answers
9k views

what is a difference between double DES and 3 DES

as i'm not getting the exact main point of 2 DES and 3DES. I would like to know the difference between the two, why 3 DES is chosen on 2 DES?
3
votes
1answer
96 views

What is the output length of CBC with zero input?

Given this formula for CBC encryption from 6.2 The Cipher Block Chaining Mode what is the output length of CBC if plaintext P is of length 0?
1
vote
2answers
634 views

Why two key DES algorithm provides only 80 bits security

In the wiki link, it is mentioned that due to "chosen-plaintext" or "known-cipher" attacks, two key DES provides only 80 bits of security. My question is how these attacks work and how did NSIT came ...