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ithisa
  • Member for 10 years, 11 months
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37 votes
4 answers
10k views

Why is plain-hash-then-encrypt not a secure MAC?

19 votes
2 answers
1k views

Is there any SRP-like key exchange only using "standard" cryptographic primitives?

18 votes
1 answer
8k views

Is TEA considered secure?

6 votes
2 answers
337 views

Is it possible to construct a secure block cipher of size $2n$ given a secure block cipher of size $n$?

6 votes
2 answers
1k views

Random session key + predictable IV

5 votes
2 answers
1k views

Are there public $p$ and $q$ numbers for use in DSA?

5 votes
2 answers
2k views

Is this hand cipher any more secure than the Vigenère cipher?

5 votes
1 answer
182 views

Do low-entropy fingerprints actually make any sense?

4 votes
1 answer
3k views

Why are collision attacks important when talking about MAC schemes?

3 votes
3 answers
2k views

OFB or CTR mode without an IV

3 votes
0 answers
98 views

A "concatenation-like" cryptographic operation that has a fixed output?

2 votes
1 answer
483 views

How does SSL secure the initial handshake?

1 vote
0 answers
136 views

Why don't we use H(m||k) as a MAC? [duplicate]

1 vote
0 answers
326 views

Is "hash-then-XOR" a good way of incrementally hashing an unordered set? [duplicate]