Calculating inverse of transposition key cipher
119299
Getting inverse of a transposition key
102898
Multiple AES Key Derivation from a master key
84466
How to compute the inverse of a polynomial under $GF(2^8)$?
143051
Inverting noninvertible elements in a bigger ring.
101544
Method to reverse a Kronecker product
17610
Transpose/Unzip Function (inverse of zip)?
133168
One Encryption, Many Decryption Keys
72335
On-the-fly computation of AES Round Keys for decryption?
79726
Inverse public-key encryption
10729
DES — Can I recover the key when I have both ciphertext and the plaintext?
1050
Counting inversions in an array
138993
Conjugate transpose of a U-gate
109568
For a given plaintext-ciphertext pair, how many valid AES keys are there?
151664
How does DES decryption work? Is it the same as encryption or the reverse?
137207
Two different keys decrypting same content
87059
Need help understanding math behind Rijndael S-Box
41888
How to prove that permutation and substitution ciphers satisfy H(X) = H(Y) in Shanon Entropy?