User Maarten Bodewes

203 votes

Accepted

What are the differences between .pem, .csr, .key, .crt and other such file extensions?

answered Feb 8, 2017 at 15:08

120 votes

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What is the difference between PKCS#5 padding and PKCS#7 padding

answered Jul 4, 2013 at 21:18

66 votes

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Are one-time pads crackable in theory?

answered Jun 12, 2017 at 1:05

62 votes

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Ciphertext and tag size and IV transmission with AES in GCM mode

answered Jul 7, 2015 at 21:15

58 votes

What are the chances that AES-256 encryption is cracked?

answered Apr 13, 2017 at 0:03

43 votes

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Why is it not possible to increase the size of RSA keys indefinitely?

answered Dec 13, 2016 at 9:10

41 votes

Why does Neumann think cryptography isn't the solution?

answered Aug 12, 2016 at 11:34

35 votes

Is it easy to crack a hashed phone number?

answered Jun 30, 2020 at 19:29

34 votes

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After 20 years of AES, what are the retrospective changes that should have been made?

answered Jan 18, 2021 at 14:38

33 votes

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Looking at hash output – is Base64 encoding in any way better than HEX encoding?

answered Jul 28, 2017 at 15:47

33 votes

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AES-GCM recommended IV size: Why 12 bytes?

answered Nov 17, 2016 at 14:24

33 votes

What is the maximum size of the plaintext message for RSA OAEP?

answered Dec 6, 2016 at 10:08

32 votes

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Is RSA encryption with a private key the same as signature generation?

answered May 4, 2014 at 16:43

32 votes

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What is a ratchet?

answered Sep 4, 2016 at 0:54

32 votes

Does "Shattered" actually show SHA-1-signed certificates are "unsafe"?

answered Jul 9, 2018 at 12:29

31 votes

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What password hash function for the next 50 years?

answered Jul 24, 2018 at 13:21

30 votes

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Does AAD make GCM encryption more secure?

answered May 31, 2016 at 13:34

27 votes

AES vs RSA - Which is stronger given two scenarios?

answered Jun 5, 2017 at 23:32

26 votes

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What's the difference between PBKDF and SHA and why use them together?

answered May 12, 2016 at 23:52

25 votes

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Why did TLS 1.3 prohibit PGP authentication?

answered Nov 14, 2018 at 1:34

25 votes

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How many bits in the resultant hash will change, if the x bits are changed in its the original input?

answered Jul 16, 2019 at 17:56

24 votes

What is the advantage of AEAD ciphers?

answered Jul 31, 2015 at 13:18

24 votes

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How hard is it to guess a 8 digit PIN?

answered Jan 15, 2020 at 23:43

23 votes

Using ECB as RSA encryption mode when encrypted messages are unique?

answered Jun 25, 2015 at 22:42

23 votes

What size should the HMAC key be with SHA-256?

answered Dec 23, 2015 at 10:04

22 votes

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What is wrong with XOR encryption with secure PRNG?

answered Jan 7, 2022 at 13:46

22 votes

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Is using a broken SHA-1 for password hashing secure?

answered Apr 7, 2017 at 10:08

22 votes

What is the difference between key size and block size (for AES)?

answered Jan 2, 2016 at 11:32

22 votes

Why is OTP not vulnerable to brute-force attacks?

answered Mar 3, 2016 at 12:47

22 votes

Spoken encryption

answered Jul 25, 2019 at 7:59

Stack Exchange Network

1,936 Answers

What are the differences between .pem, .csr, .key, .crt and other such file extensions?

What is the difference between PKCS#5 padding and PKCS#7 padding

Are one-time pads crackable in theory?

Ciphertext and tag size and IV transmission with AES in GCM mode

What are the chances that AES-256 encryption is cracked?

Why is it not possible to increase the size of RSA keys indefinitely?

Why does Neumann think cryptography isn't the solution?

Is it easy to crack a hashed phone number?

After 20 years of AES, what are the retrospective changes that should have been made?

Looking at hash output – is Base64 encoding in any way better than HEX encoding?

AES-GCM recommended IV size: Why 12 bytes?

What is the maximum size of the plaintext message for RSA OAEP?

Is RSA encryption with a private key the same as signature generation?

What is a ratchet?

Does "Shattered" actually show SHA-1-signed certificates are "unsafe"?

What password hash function for the next 50 years?

Does AAD make GCM encryption more secure?

AES vs RSA - Which is stronger given two scenarios?

What's the difference between PBKDF and SHA and why use them together?

Why did TLS 1.3 prohibit PGP authentication?

How many bits in the resultant hash will change, if the x bits are changed in its the original input?

What is the advantage of AEAD ciphers?

How hard is it to guess a 8 digit PIN?

Using ECB as RSA encryption mode when encrypted messages are unique?

What size should the HMAC key be with SHA-256?

What is wrong with XOR encryption with secure PRNG?

Is using a broken SHA-1 for password hashing secure?

What is the difference between key size and block size (for AES)?

Why is OTP not vulnerable to brute-force attacks?

Spoken encryption