Cryptography
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kelalaka
  • Member for 9 years
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  • At the corner of the flat Earth.
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944 Answers

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115 votes

Why do some people believe that humans are "bad at" generating random numbers/characters like this?

69 votes
Accepted

Other than password hashes, are there other uses for non-reversible crypto

49 votes
Accepted

7zip : Why does encrypting the same file with AES-256 not give the same output?

42 votes

Has AES-128 been fully broken?

35 votes

Why is this not a viable key exchange algorithm?

33 votes
Accepted

Why is double encryption that's equivalent to single encryption no better than single encryption?

32 votes

How do hashes really ensure uniqueness?

32 votes
Accepted

Would this be considered a secure password hash?

29 votes
Accepted

How reassuring is 64-bit (in)security?

27 votes

Is one-time pad encryption vulnerable when near identical data is sent many times with different OTP?

26 votes
Accepted

Why "1" in 51% attack on Blockchain network

25 votes
Accepted

What are the consequences of removing a single byte from a sha256 hash?

22 votes

What makes SHA-256 secure?

22 votes
Accepted

Bit Flipping Attack on CBC Mode

20 votes
Accepted

Why don't we use Blowfish if it hasn't been cracked?

20 votes
Accepted

Why does SHA2-224 use different IV's than SHA2-256?

19 votes

Why might SHA-384 throughput be lower than SHA-512 throughput in hashcat and more secure?

18 votes
Accepted

Security levels in NIST Post-quantum project: e.g. AES-128 vs SHA-256

18 votes
Accepted

Is double SHA-256 the best choice for Bitcoin?

17 votes
Accepted

Is it proven that breaking RSA is equivalent to factoring as of 2021?

17 votes
Accepted

Is there any famous protocol that were proven secure but whose proof was wrong and lead to real world attacks?

16 votes
Accepted

AES GCM : is it acceptable to return the wrong plaintext if the tag is incorrect?

16 votes
Accepted

Why is SHA-512 limited to an input of $2^{128}$ bits?

16 votes
Accepted

Multiple AES Key Derivation from a master key

16 votes
Accepted

Is 512 bits a more secure hashing than 256 bits?

16 votes
Accepted

What the X stands for in the front of Elliptic curve names like X25519

16 votes

What should the nonce value be for client-side encryption?

16 votes
Accepted

Is Bruce Schneier Applied Cryptography, Second ed. up to date?

15 votes
Accepted

Which block cipher mode of operation does TLS 1.3 use?

15 votes

Why does BitLocker not use RSA?

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