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Oct
9
comment post-quantum threshold secret sharing
If by threshold secret sharing, you mean something like Shamir's secret sharing, you can continue to use it. It's secure against computationally unbounded attackers i.e. it offers information theoretic security. It's essentially a system with less equations than variables, so there are many equally likely solutions.
Oct
9
comment AES file encryption with PBKDF2. Safe parameters?
@hunter one has to be careful about that. If one directly requests more than the natural size from PBKDF2 it can increase the cost for the defender but not for the attacker. Personally I like HKDF-Expand for this step.
Oct
9
comment what are the uses of tweaks in block ciphers?
I've only seen tweaks used as a block counter.
Oct
9
reviewed Approve disk-encryption tag wiki
Oct
9
reviewed Approve matrix-multiplication tag wiki excerpt
Oct
9
reviewed Approve multiple-encryption tag wiki excerpt
Oct
9
reviewed Approve matrix-multiplication tag wiki
Oct
9
reviewed Approve multiple-encryption tag wiki
Oct
9
reviewed Approve disk-encryption tag wiki excerpt
Oct
9
comment AES file encryption with PBKDF2. Safe parameters?
1024 iterations is very low. If you can afford the performance hit, use a larger value. On a desktop computer you should be able to afford a million iterations.
Oct
8
comment How do TLS 1.1 and 1.2 generate IVs (initialization vectors) for each record?
The obvious implementation is requesting 16 bytes from the PRNG.
Oct
8
comment How does redundancy in a file effects performance and security of encryption?
Proper encryption doesn't notice redundancy. You're putting in a bunch of bytes, getting out a bunch of bytes and runtime only depends on the length of the input.
Oct
8
awarded  Nice Question
Oct
8
comment Does BouncyCastle (for ECC) resist timing attacks?
I wouldn't use the ECC code in BouncyCastle C#.
Oct
8
comment How does one use AES block cipher modes of operation?
I don't get your question. You say that you have 8 bit block size, but you also mention AES. That makes no sense. Do you mean that you need to encrypt messages which aren't a multiple of 128 bits without length increase?
Oct
8
reviewed Approve timestamping tag wiki
Oct
8
reviewed Approve timestamping tag wiki excerpt
Oct
8
reviewed Approve fortuna tag wiki
Oct
8
reviewed Approve fortuna tag wiki excerpt
Oct
7
comment Does ElGamal Encryption create a different key for each block sent?
cross-posted on SO