How to find key given Vigenere Ciphertext?
135719
Solving Vigenère Encryption
136478
Hash keys probe and residual
71414
Whose key is used to encrypt a HTTPS response?
64163
Using Chi-Square for Vigenère Cipher
103287
AES-128. Do there exist two different keys for a pair (text, encrypted text)?
15635
Encrypting/Decrypting a single file in Ubuntu 12.04 LTS
108582
Hill cipher, unknown letter value
114300
random access stream cipher
3765
Is it possible to obtain AES-128 key from a known ciphertext-plaintext pair?
114578
Design properties of the Rijndael finite field?
67319
How do ciphers change plaintext into numeric digits for computing?
35531
Block cipher fixed points (plaintext equal to ciphertext)
138218
Is it possible to perform a rudimentary asymmetric key encryption algorithm by hand?
49136
How to compute $m$ value from RSA if $phi(n)$ is not relative prime with the $e$?
117481
How to perform the modular reduce of Rijndael's finite field
41240
Generating a cryptographically secure, many-time use, symmetric encryption key
38154
How to verify a number encrypted with an unknown key