Notable Question - Badge - Cryptography Stack Exchange

Notable Question

Question with 2,500 views. This badge can be awarded multiple times.

Awarded 3751 times.

Why did TLS 1.3 prohibit PGP authentication?

Awarded 2 days ago

Alex Shpilkin

3703 silver badges11 bronze badges

How can uniformity of hash functions (e.g. SHA-256) be proved?

Awarded 2 days ago

Drux

2432 silver badges6 bronze badges

MAC size 128 bits or more?

Awarded 2 days ago

daralim

371 silver badge7 bronze badges

It possible to encrypt .bmp bitmap files using Stream Cipher Chacha20?

Awarded Sep 11 at 17:32

akez

871 silver badge6 bronze badges

Does AES-CBC always use PKCS#7?

Awarded Sep 9 at 20:00

wujek

1751 silver badge7 bronze badges

Does CCA security imply authenticated encryption?

Awarded Sep 9 at 6:09

abdolahS

4395 silver badges11 bronze badges

How does Montgomery reduction work?

Awarded Sep 5 at 19:20

Aravind A

1,06012 silver badges21 bronze badges

Encrypt a big file in blocks with AES-GCM: how many nonce do we need?

Awarded Sep 5 at 17:06

Basj

5534 silver badges23 bronze badges

HMAC-SHA256 on large data files

Awarded Sep 5 at 5:57

Zyend

1552 silver badges7 bronze badges

Make a Strong, Easy-to-Remember Password Using Classical Cryptography?

Awarded Sep 4 at 16:41

Patriot

3,1423 gold badges19 silver badges66 bronze badges

Difference Between an Authentication Token and an OTP (One Time Password)

Awarded Sep 4 at 8:30

DaWNFoRCe

8727 silver badges17 bronze badges

Does the AES-KW (Key Wrap Algorithm) perform authenticated encryption?

Awarded Sep 4 at 4:18

Shruggie

2373 silver badges9 bronze badges

Why are the initial states of hashes functions (like SHA-1) often non-zero?

Awarded Sep 4 at 3:40

Cryptographeur

4,3372 gold badges28 silver badges40 bronze badges

When do we need composite order groups for bilinear maps and when prime order?

Awarded Sep 4 at 2:34

curious

6,2306 gold badges33 silver badges46 bronze badges

Short length asymmetric encryption?

Awarded Sep 3 at 2:56

Cacacapipo

511 silver badge2 bronze badges

Is it safe to use a timestamp to build a nonce?

Awarded Sep 1 at 9:13

martinstoeckli

1231 silver badge8 bronze badges

Zero-knowledge proof using quadratic residue: why two options?

Awarded Aug 31 at 9:47

healthycola

1831 silver badge3 bronze badges

Is there a maximum amount of data which can be encrypted using a symmetric (AES256) key?

Awarded Aug 30 at 18:12

Jeff W

1931 silver badge5 bronze badges

Is it secure to ECDSA-sign a public key without hashing it first?

Awarded Aug 30 at 7:34

Sossenbinder

1751 silver badge6 bronze badges

How can a root CA be kept offline and function

Awarded Aug 28 at 19:19

dobro

311 silver badge5 bronze badges

What encryption mode should I use to protect CAN bus communication?

Awarded Aug 25 at 15:31

Peter Kamel

191 silver badge3 bronze badges

What is the malicious potential of a key-substitution-attack?

Awarded Aug 23 at 3:18

MichaelW

1,5071 gold badge14 silver badges24 bronze badges

Is CPU timing jitter a usable entropy source?

Awarded Aug 22 at 23:13

Demi

4,8131 gold badge20 silver badges40 bronze badges

What is ANSI X.923 padding standard?

Awarded Aug 22 at 4:56

kludg

7365 silver badges10 bronze badges

What is the probability of any two users generating the same 128, 256, 2048 bit key?

Awarded Aug 20 at 14:23

Axwell

211 silver badge1 bronze badge

Why blake2b is the fastest despite it being 512 bits hashing algorithm?

Awarded Aug 20 at 0:19

Hinton Zsh

3413 silver badges9 bronze badges

Space needed to store an RSA private key

Awarded Aug 18 at 12:01

Awn

1,5921 gold badge14 silver badges18 bronze badges

Euler's totient function and Carmichael's totient function in RSA [duplicate]

Awarded Aug 14 at 18:42

dkssud10

1251 silver badge5 bronze badges

CMAC vs HMAC security strength

Awarded Aug 13 at 10:10

BlaX

7468 silver badges18 bronze badges

How to encrypt this using caesar cipher?

Awarded Aug 13 at 4:12

Ishan

111 silver badge2 bronze badges

Is it possible to decrypt an ECDSA private key if the same nonce is used across different private keys?

Awarded Aug 12 at 17:15

Anonymous

1531 silver badge4 bronze badges

Can SHA256 hash be considered as a secure key proof?

Awarded Aug 10 at 19:10

CryptoCrypto224

111 silver badge2 bronze badges

How is NIST's Key Wrap (using AES GCM) different than normal AES GCM Authenticated encryption?

Awarded Aug 10 at 9:15

Akash

711 silver badge3 bronze badges

Encrypting text file line by line with stable encryption

Awarded Aug 10 at 5:36

Aaron Digulla

1411 silver badge5 bronze badges

Why is DDH not hard over $\mathbb{Z}^*_p$?

Awarded Aug 9 at 8:15

user2771151

3273 silver badges7 bronze badges

When do ECC patents end?

Awarded Aug 8 at 22:18

Smit Johnth

1,7014 gold badges18 silver badges27 bronze badges

Collision in SHA-1 first 8 bytes [closed]

Awarded Aug 6 at 7:43

ricovale1

11 silver badge1 bronze badge

How are new coins minted in Proof of Stake systems

Awarded Aug 3 at 18:16

sevensevens

1911 silver badge6 bronze badges

Is HMAC SHA1 algorithm secure in 2022? [duplicate]

Awarded Aug 2 at 17:39

sunknudsen

1991 silver badge8 bronze badges

How does gpg know what cipher algorithm is needed for decryption?

Awarded Aug 2 at 6:13

Trevor Boyd Smith

1411 silver badge5 bronze badges

Why GCM is used more often than CTR?

Awarded Jul 30 at 6:58

Ievgeni

2,6251 gold badge11 silver badges32 bronze badges

How does the HOTP dynamic truncation function generalize to longer hashes?

Awarded Jul 30 at 2:18

otus

32.3k5 gold badges72 silver badges167 bronze badges

With SHA-1 broken, can the old Linux /dev/(u)random algorithm be trusted?

Awarded Jul 25 at 16:36

juhist

1,6131 gold badge12 silver badges17 bronze badges

Why do people use protocols like PGP, when TLS already exists?

Awarded Jul 25 at 15:36

Agniva Chaudhuri

231 silver badge4 bronze badges

zk-SNARKs vs. Zk-STARKs vs. Bulletproofs: definitions

Awarded Jul 24 at 11:21

Ruben De Smet

2,43013 silver badges26 bronze badges

Is it safe to use file's hash as IV?

Awarded Jul 22 at 4:12

Ariyan

3513 silver badges8 bronze badges

How to generate random numbers within a range (0,n) from random bits?

Awarded Jul 21 at 14:33

crypt

2,49220 silver badges32 bronze badges

What is the best way to derive a encryption key from the serial number?

Awarded Jul 19 at 18:48

user1748070

211 silver badge3 bronze badges

RSA exercises example

Awarded Jul 18 at 21:56

theantomc

1892 silver badges9 bronze badges

Is the XOR of hashes a good hash function?

Awarded Jul 18 at 12:03

Rafael

1531 silver badge7 bronze badges

What does ''latency'' really mean when a block cipher is partially unrolled?

Awarded Jul 18 at 10:03

Bo Wang

711 silver badge2 bronze badges

Polynomial representation of the affine part of the AES S-box

Awarded Jul 18 at 6:53

Angela

3532 silver badges10 bronze badges

How can cryptographic signatures be somehow linked to a physical signature?

Awarded Jul 18 at 4:41

rahulg

1631 silver badge5 bronze badges

Why does Smart's attack only work on anomalous curves?

Awarded Jul 17 at 19:56

Rufus Anton

711 silver badge2 bronze badges

Maximum Number of Blocks to be Encrypted under One Key in CBC and CTR Mode?

Awarded Jul 17 at 17:28

crypt

2,49220 silver badges32 bronze badges

Why is ISAAC not a pseudo random number generator?

Awarded Jul 17 at 7:05

Paul Uszak

15.7k2 gold badges29 silver badges81 bronze badges

Cracking Elliptic Curve Cryptography

Awarded Jul 17 at 1:58

James

1992 silver badges10 bronze badges

Can I find the IV of a single block of SHA256, given the plaintext and digest?

Awarded Jul 16 at 18:37

Joel

1231 silver badge5 bronze badges

Why are some key stretching methods better than others?

Awarded Jul 15 at 21:18

Gudradain

1211 silver badge4 bronze badges

How is AES-GCM IV and auth tag used?

Awarded Jul 15 at 16:21

Kim Mỹ

1651 gold badge2 silver badges10 bronze badges

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