User e-sushi

61 votes

Accepted

Kerckhoffs’ principles – Why should I make my cipher public?

answered Aug 6, 2013 at 16:01

41 votes

Why can't we reverse hashes?

answered Apr 6, 2017 at 16:45

38 votes

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How cryptographically secure was the original WW2 Enigma machine, from a modern viewpoint?

answered Jan 27, 2014 at 13:26

30 votes

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Is it possible to actually verify a “sponge function” security claim?

answered Jul 22, 2013 at 17:07

30 votes

Are there any known collisions for the SHA (1 & 2) family of hash functions?

answered Jul 22, 2013 at 22:10

29 votes

Zero knowledge proof protocol example?

answered Dec 18, 2013 at 16:39

20 votes

Accepted

Cryptography vs Security

answered Aug 19, 2014 at 16:48

20 votes

Why is SHA-3 a Sponge function?

answered Mar 11, 2018 at 14:29

18 votes

What tests can I do to ensure my random number generator is working correctly?

answered Jul 11, 2014 at 6:37

17 votes

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Why is Curve25519 in the GPG “expert” options?

answered Nov 5, 2017 at 17:49

16 votes

Do any non-US ciphers exist?

answered Aug 29, 2014 at 23:15

16 votes

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Is base64 the best two-way hash function to encrypt and transmit a set of integer numbers via the internet?

answered Sep 18, 2015 at 4:10

15 votes

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If PGP and GPG both follow the OpenPGP standard, are they 100% compatible in all use cases?

answered Jan 25, 2014 at 4:53

15 votes

Did non-military cryptography appear in the 50's and 60's only due to NSA leaks?

answered Nov 5, 2013 at 20:42

14 votes

Accepted

Why are cryptography algorithms not exported to certain countries?

answered Oct 1, 2013 at 11:32

13 votes

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Fastest random number generator

answered Jun 23, 2014 at 17:19

13 votes

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Why was the Navajo code not broken by the Japanese in WWII?

answered Feb 5, 2016 at 18:45

12 votes

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Do I need to use a CSPRNG when creating salts for user accounts?

answered May 25, 2016 at 23:25

11 votes

Desirable S-box properties

answered Sep 1, 2014 at 19:13

11 votes

The exact difference between a permutation and a substitution

answered Aug 4, 2014 at 1:08

11 votes

Accepted

How exactly does key whitening manage to increase security?

answered Aug 6, 2014 at 19:58

11 votes

Cryptographic Challenge: How to Say Something Confidentially to Snowden?

answered Jul 4, 2013 at 18:56

11 votes

Accepted

What changed in PKCS#1 v2.2, and why?

answered Jul 28, 2013 at 4:43

10 votes

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How does Microsoft's BitLocker Recovery Code work?

answered Apr 13, 2016 at 4:12

10 votes

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To what extent is WhatsApp's statement on secure messaging realistic?

answered May 2, 2016 at 12:17

10 votes

How does one verify a GPG/PGP key revocation?

answered Jul 15, 2016 at 5:32

10 votes

What makes Quantum Cryptography secure?

answered Sep 8, 2017 at 13:27

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

9 votes

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

answered Jan 26, 2018 at 7:29

9 votes

Accepted

What exactly is a “security parameter”?

answered Oct 17, 2017 at 9:29

Stack Exchange Network

207 Answers

Kerckhoffs’ principles – Why should I make my cipher public?

Why can't we reverse hashes?

How cryptographically secure was the original WW2 Enigma machine, from a modern viewpoint?

Is it possible to actually verify a “sponge function” security claim?

Are there any known collisions for the SHA (1 & 2) family of hash functions?

Zero knowledge proof protocol example?

Cryptography vs Security

Why is SHA-3 a Sponge function?

What tests can I do to ensure my random number generator is working correctly?

Why is Curve25519 in the GPG “expert” options?

Do any non-US ciphers exist?

Is base64 the best two-way hash function to encrypt and transmit a set of integer numbers via the internet?

If PGP and GPG both follow the OpenPGP standard, are they 100% compatible in all use cases?

Did non-military cryptography appear in the 50's and 60's only due to NSA leaks?

Why are cryptography algorithms not exported to certain countries?

Fastest random number generator

Why was the Navajo code not broken by the Japanese in WWII?

Do I need to use a CSPRNG when creating salts for user accounts?

Desirable S-box properties

The exact difference between a permutation and a substitution

How exactly does key whitening manage to increase security?

Cryptographic Challenge: How to Say Something Confidentially to Snowden?

What changed in PKCS#1 v2.2, and why?

How does Microsoft's BitLocker Recovery Code work?

To what extent is WhatsApp's statement on secure messaging realistic?

How does one verify a GPG/PGP key revocation?

What makes Quantum Cryptography secure?

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

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

What exactly is a “security parameter”?