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2d
awarded  Nice Question
2d
comment How solid is this method of encryption?
Requests for analysis of amateur cryptographic schemes are off-topic here, so expect the question to be closed (no hard feelings). Also, while I cannot point out any specific problem with this approach, I am pretty sure it isn't secure. Good references for your further research include how to publish a cipher concept and lessons learned and common misconceptions about cryptography.
2d
accepted Practical differences between circuits and turing machines for cryptography
2d
awarded  Yearling
Apr
26
asked Practical differences between circuits and turing machines for cryptography
Apr
22
comment How secure is this logarithmic encryption algorithm?
Semi-Related: How to publish a cipher (concept) has a number of hints on what to do if you want to design and evaluate your own ciphers.
Apr
21
comment GCM: use the same key:IV pair to encrypt file and filename
You could derive the new IV from the old one (e.g. by hashing, using a KBKDF, ...) and still be safe, it only matters that they are different. That way, you would not have to save two different IVs.
Apr
15
awarded  Quorum
Mar
29
comment I homebrewed an algorithm. Is it secure?
See How to publish a cipher for some pointers on what to do when developing your own ciphers, it has some good pointers.
Mar
29
asked Finding missing probabilities for formal proofs
Mar
28
revised DES: Computing the output of S-Box 1?
Formatting
Mar
28
revised Why is padded RSA not CCA-secure?
add CCA tag
Mar
28
suggested approved edit on Why is padded RSA not CCA-secure?
Mar
28
reviewed No Action Needed Can I open a file in plaintext (already decrypt) but the cipher doesn't change?
Mar
28
reviewed Reviewed DES: Computing the output of S-Box 1?
Mar
28
suggested approved edit on DES: Computing the output of S-Box 1?
Mar
28
reviewed Reviewed multiplicative inverse in galois field $2^8$
Mar
28
reviewed Reviewed Why is CRC said to be linear?
Mar
28
suggested rejected edit on Authenticated encryption with Enc-Sign-Mac
Mar
26
awarded  Citizen Patrol