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fadedbee
  • Member for 9 years, 9 months
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0 votes
0 answers
13 views

How many extra bits of security can I get from an intermediate finalisation of SipHash-2-4?

6 votes
2 answers
2k views

Are curve secp256k1 ECDSA signatures distinguishable from random data?

2 votes
1 answer
89 views

Equality between encrypted hash of data and hash of encrypted data?

0 votes
0 answers
33 views

Reorderable encryptions [duplicate]

2 votes
1 answer
121 views

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

3 votes
1 answer
272 views

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

1 vote
1 answer
156 views

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

19 votes
2 answers
11k views

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

3 votes
1 answer
620 views

Elliptic curves on finite fields

1 vote
2 answers
267 views

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

0 votes
1 answer
334 views

How to use OpenSSL to prove non-repudiation

1 vote
0 answers
876 views

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

2 votes
2 answers
2k 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
244 views

What is the maths behind Bitcoin's BIP32?

3 votes
3 answers
409 views

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

2 votes
1 answer
437 views

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

0 votes
0 answers
108 views

Security of SecretKey addition and PublicKey multiplication in secp256k1

1 vote
1 answer
487 views

AES-128 or AES-256 with 18 bytes of key storage?

1 vote
2 answers
874 views

Does the Blake3 hash have identities, due to its merkle tree structure?

1 vote
0 answers
127 views

Is it OK to use a doubled key for XTS-AES?

1 vote
3 answers
313 views

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

0 votes
1 answer
819 views

If you know the messages, and the results of HMAC(key, message) can you find the key?

3 votes
2 answers
1k views

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

0 votes
0 answers
227 views

Is there a relation between the private keys of secp256k1 public keys of opposite parities?

2 votes
2 answers
55 views

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

2 votes
1 answer
93 views

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

0 votes
0 answers
48 views

Are there any hashing functions where you can perform operations on the hashes without knowing the source data?

3 votes
3 answers
3k views

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

5 votes
1 answer
2k views

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

1 vote
1 answer
190 views

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