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Aug
30
comment Webcam random number generator
@PaulUszak does it say anything about JPEG? The webcam could give you pure uncompressed image data, which you can subtract. (The web page doesn't seem to be available anymore.) I also don't see how treating the whole JPEG file as one entropy source makes stuff better.
Aug
27
awarded  Enlightened
Aug
27
awarded  Nice Answer
Aug
27
awarded  Nice Answer
Aug
23
answered Request for review: known plaintext mitigation by rotation and xor encoding
Aug
21
answered Combine two sha512 hashes to a single hash
Aug
20
revised Combining several symmetric ciphers using XOR
associativity alone is not enough.
Aug
20
comment Combining several symmetric ciphers using XOR
You might want to mention that for this to be secure, both ciphers must be sufficiently non-similar so they don't cancel each other out, or have independent keys, preferably both.
Aug
20
comment Combining several symmetric ciphers using XOR
Please don't use the word "one-time pad" for a stream cipher. This is not the same.
Aug
15
answered Mathematically / statistically “safe” way to differentiate between crypto and random blob?
Jul
12
awarded  Yearling
Jul
12
comment How is an epsilon of 1/1000 non-negligible?
Could you elaborate on this? As it is, it doesn't answer the question at all.
Jul
1
awarded  Deputy
Jun
29
awarded  Constituent
Jun
27
awarded  Nice Question
Jun
17
awarded  Caucus
Jun
13
comment Encryption of exe file
Encryption works on anything, not just "text".
Jun
6
revised SHA-256 hash of null input?
make clear what is wanted
Jun
6
comment Are there security issues with adding plaintext length to TLS packets?
Note that your changed protocol will not be compatible to TLS anymore.
Jun
6
comment Share two secrets between two parties
Welcome to Cryptography Stack Exchange. We actually prefer answers which contain the information itself, not just referring to information elsewhere. Could you add a summary of the information to the answer? Otherwise we will convert your answer to a comment.