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fadedbee
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18 votes
2 answers
11k views

Deterministically generate a RSA public/private key pair from a passphrase (with sufficient entropy)?

13 votes
2 answers
3k views

Encrypt-then-MAC: Do I need to authenticate the IV?

5 votes
2 answers
1k views

Why is ECIES complex?

5 votes
1 answer
2k views

Do aes_256_gcm IVs just need to be unique for that key?

4 votes
2 answers
745 views

Why/how is libsodium/nacl's cryptobox repudiable?

4 votes
2 answers
552 views

Cryptographically strong seeded pseudo random number generator

3 votes
1 answer
1k views

Is there a standard for public key encrypting and signing short messages?

3 votes
3 answers
3k views

Any weakness when performing SHA-256 repeatedly? [duplicate]

3 votes
1 answer
531 views

Elliptic curves on finite fields

3 votes
3 answers
268 views

Can you create an encryption algorithm from a signing algorithm, or vice versa?

3 votes
1 answer
213 views

Does ECDH on secp256k produce a defined shared secret for two key pairs, or is it implementation defined?

3 votes
2 answers
1k views

Is it safe to XOR-combine hashes by rotating them first?

2 votes
2 answers
1k views

Is there a relationship between the secp256k1 public key of the sum of two private keys, and the public keys of those original two private keys?

2 votes
1 answer
214 views

What is the maths behind Bitcoin's BIP32?

2 votes
1 answer
84 views

What is the best way of deterministically choosing N of M, given 32 bytes of sha256?

2 votes
2 answers
54 views

Does selectively generating keypairs with particular public-key hash prefix weaken the security?

2 votes
1 answer
81 views

Does using only one sign of secp256k1 publc keys weaken security?

2 votes
1 answer
3k views

ECDSA for encryption

2 votes
2 answers
1k views

Is there a form of AES encryption where the cipher text matches the length of the clear text and does not show patterns?

2 votes
0 answers
136 views

Is it possible to enumerate the possible RSA keys? [duplicate]

2 votes
1 answer
356 views

Do some Block Cipher Modes encrypt the nonce and then XOR it with the data?

1 vote
1 answer
1k views

How to find the secret key and nonce from two messages encrypted using the same nonce?

1 vote
2 answers
815 views

Need for secure hash function for a bloom filter

1 vote
1 answer
1k views

What is best practise for salting and multiple-hashing of passwords?

1 vote
1 answer
162 views

Can sending the same plaintext twice, each encrypted with different key and IV, weaken the encryption?

1 vote
1 answer
989 views

Is the result of HMAC-sha256 distinguishable from random noise?

1 vote
2 answers
201 views

Is it safe to sign message with a TLS private key?

1 vote
1 answer
77 views

Is there any point in extending an 80-bit key before using it for HMAC-SHA256?

1 vote
0 answers
723 views

AES256-GCM Is it safe to both add the IV to the AAD and use it in the encryption?

1 vote
3 answers
280 views

Using sha3 as a deterministic source of psuedo-random bytes for xor encryption