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Aug
22
comment Is it secure to derive an AES key from a MAC?
Having never worked with HSM's, is there any sort of authorization with them? I.e., to prove that you are allowed to generate keys? An attacker stealing the database who also has access to the server with the HSM, could issue the random numbers to the HSM and get back the decryption keys.
Aug
22
comment How does a chosen plaintext attack on RSA work?
Link only answers are not typically well received here. While the paper is a very good one, you should consider expanding by talking about what information the paper presents that is specifically related to the question.
Aug
19
awarded  Good Answer
Aug
17
awarded  Announcer
Aug
15
answered Chosen plaintext attack on textbook RSA decryption
Aug
15
comment Chosen plaintext attack on textbook RSA decryption
When you say "I must generate a random $n$ from a range of $n-1$ values" do you mean "I must generate a random $r$ from a range of $n-1$ values"?
Aug
15
answered Subverting the key generation step in RSA public key cryptography
Aug
14
comment Chosen plaintext attack on textbook RSA decryption
Can you update your question using MathJax? It will make the equations much more readable. Also, what have you tried? Where are you stuck in solving it yourself?
Aug
10
comment $(k, n)$ threshold secret sharing to $(k+k', n + n')$ without reissuing all shares
How trustworthy are the parties who are given the shares?
Aug
10
comment $(k, n)$ threshold secret sharing to $(k+k', n + n')$ without reissuing all shares
Do you have an adversary model in mind?
Aug
7
awarded  aes
Aug
7
awarded  hash
Aug
6
awarded  Enlightened
Aug
6
awarded  Nice Answer
Aug
5
comment How many degrees of freedom up my sleeve?
This might be hard to answer unless you can come up with a good measure for how suspicious an algorithm is.
Aug
5
answered How to only encrypt a subset of the plaintext
Aug
5
comment How to only encrypt a subset of the plaintext
Is there one continuous subset or many disjointed subsets? Do you require that the output (of plaintext and ciphertext) be the same length as the input plaintext? Do you want the ciphertext to be in-line with the plaintext?
Aug
5
revised Public key in fully homomorphic encryption over the integers
added 2 characters in body
Aug
5
awarded  Enlightened
Aug
5
awarded  Nice Answer