User e-sushi

3 votes

Accepted

If you wrote a reversible SHA-256 algorithm, how many "metadata" bits would be required for reversability?

answered Nov 27, 2018 at 19:09

0 votes

Size of A Hashed String Using SHA-512

answered Nov 12, 2018 at 2:27

3 votes

Accepted

Decrypting SHA-512

answered Oct 4, 2018 at 3:13

4 votes

Is there a consensus on what text encoding to use when hashing a string?

answered Jul 21, 2018 at 5:27

1 vote

How can I create a stream cipher from a block cipher?

answered Jun 26, 2018 at 3:45

4 votes

Is it possible for a cryptographic algorithm to limit the number of times a package/ciphertext can be decrypted?

answered Jun 21, 2018 at 2:17

2 votes

How to interpret the article claiming NIST P-256 curve to be unsafe?

answered Jun 14, 2018 at 3:40

2 votes

Multiple Encryption - One-Time Pad

answered Jun 14, 2018 at 2:37

4 votes

Is it possible to crack a LFSR encrypted file without using bruteforce?

answered May 5, 2018 at 12:52

3 votes

Writing your own Encryption algorithm?

answered May 3, 2018 at 3:54

3 votes

FIPS 140-2, Level 1 validation vs. compilation

answered Apr 20, 2018 at 12:29

4 votes

How to attack RSA with 13 primes

answered Apr 17, 2018 at 11:30

10 votes

Why is SHA3 prefixed with SHA despite the fact that it is structurally different from SHA2 and SHA1?

answered Mar 14, 2018 at 16:42

4 votes

What is an example of asymmetric cryptography?

answered Mar 12, 2018 at 11:34

20 votes

Why is SHA-3 a Sponge function?

answered Mar 11, 2018 at 14:29

1 vote

Anti-spamming hash-based proof-of-work?

answered Mar 10, 2018 at 0:01

0 votes

secretKey ⊕ (secretKey ≪ 1), is randomness lost?

answered Mar 1, 2018 at 18:46

4 votes

Best way to encrypt lots of private keys with the same passphrase

answered Mar 1, 2018 at 17:48

3 votes

Accepted

Is it generally considered acceptable for app owners to be able to retrieve private keys from users when their apps offer end-to-end encryption?

answered Feb 8, 2018 at 21:31

1 vote

Accepted

How does Naver Line PC client obtain private key for end-to-end encryption (letter-sealing)?

answered Feb 8, 2018 at 6:00

9 votes

What happens if a SHA-256 input is too long (longer than 512 bits)?

answered Jan 26, 2018 at 7:29

4 votes

What is the difference between these two TLS suites?

answered Jan 23, 2018 at 18:01

4 votes

Accepted

Has any crypto hash function been proven to be surjective?

answered Jan 12, 2018 at 0:24

1 vote

Someone discover two pair privkey for one address

answered Jan 6, 2018 at 1:54

3 votes

Why is does the protocol of Ding et al. produce biased bits and does it relate to passive security?

answered Dec 17, 2017 at 16:36

1 vote

Exact communication of the IPS compiler?

answered Dec 17, 2017 at 16:24

2 votes

Why is a nonce used to initialize Hash_DRBG, HMAC_DRBG, and CTR_DRBG?

answered Dec 17, 2017 at 16:17

1 vote

Who's talking to who encryption - does this concept work?

answered Dec 17, 2017 at 13:19

2 votes

RSA - What's to stop someone from using the same ciphertext to mimic private key holder?

answered Dec 16, 2017 at 18:48

2 votes

Proof that this is not a secure pseudorandom function?

answered Dec 15, 2017 at 19:02

Stack Exchange Network

207 Answers

If you wrote a reversible SHA-256 algorithm, how many "metadata" bits would be required for reversability?

Size of A Hashed String Using SHA-512

Decrypting SHA-512

Is there a consensus on what text encoding to use when hashing a string?

How can I create a stream cipher from a block cipher?

Is it possible for a cryptographic algorithm to limit the number of times a package/ciphertext can be decrypted?

How to interpret the article claiming NIST P-256 curve to be unsafe?

Multiple Encryption - One-Time Pad

Is it possible to crack a LFSR encrypted file without using bruteforce?

Writing your own Encryption algorithm?

FIPS 140-2, Level 1 validation vs. compilation

How to attack RSA with 13 primes

Why is SHA3 prefixed with SHA despite the fact that it is structurally different from SHA2 and SHA1?

What is an example of asymmetric cryptography?

Why is SHA-3 a Sponge function?

Anti-spamming hash-based proof-of-work?

secretKey ⊕ (secretKey ≪ 1), is randomness lost?

Best way to encrypt lots of private keys with the same passphrase

Is it generally considered acceptable for app owners to be able to retrieve private keys from users when their apps offer end-to-end encryption?

How does Naver Line PC client obtain private key for end-to-end encryption (letter-sealing)?

What happens if a SHA-256 input is too long (longer than 512 bits)?

What is the difference between these two TLS suites?

Has any crypto hash function been proven to be surjective?

Someone discover two pair privkey for one address

Why is does the protocol of Ding et al. produce biased bits and does it relate to passive security?

Exact communication of the IPS compiler?

Why is a nonce used to initialize Hash_DRBG, HMAC_DRBG, and CTR_DRBG?

Who's talking to who encryption - does this concept work?

RSA - What's to stop someone from using the same ciphertext to mimic private key holder?

Proof that this is not a secure pseudorandom function?