How can I create a block cipher of a reduced size given a fixed length block cipher?
27598
Can you create a strong blockcipher with small blocksize, given a strong blockcipher of conventional blocksize?
27270
How to generate a key using any $m$ passwords out of total $n$?
39396
Breaking a small-scale Example Diffie-Hellman?
141747
Difficulty of breaking RSA for a given key size
43473
Turning a cipher into a hashing function
103956
Make AES more secure by randomising the blocks in an encrypted file
133168
One Encryption, Many Decryption Keys
103141
Cryptographic hash where the hashing function input is similar to the result
29868
Is there an MD5 Fixed Point where md5(x) == x?
3765
Is it possible to obtain AES-128 key from a known ciphertext-plaintext pair?
88031
Possible ways to crack simple hand ciphers?
137408
Asymmetric format preserving encryption?
72335
On-the-fly computation of AES Round Keys for decryption?
28261
Padding a number in a filename to a fixed length
64163
Using Chi-Square for Vigenère Cipher
32849
How to attack a classical cipher using known partial plaintext?
138951
Affine cipher: calculate the key from a known plaintext/ciphertext pair