Possible to determine the encryption key that was used by knowing the input and output of the encryption mechanism?
10729
DES — Can I recover the key when I have both ciphertext and the plaintext?
106215
Why are the lower 3 bits of curve25519/ed25519 secret keys cleared during creation?
109568
For a given plaintext-ciphertext pair, how many valid AES keys are there?
40101
Does Knowing Two Proper Factors of an RSA Public Key Permit Decryption if $N$ is Not a Semiprime?
80005
Does homomorphic encryption hide the algorithm itself?
123330
Is there any way to decrypt .locky files?
32849
How to attack a classical cipher using known partial plaintext?
9168
Is there an application to identify the configuration driving a system-global keypress
75921
How can I automate gpg decryption which uses a passphrase while keeping it secret?
3765
Is it possible to obtain AES-128 key from a known ciphertext-plaintext pair?
137207
Two different keys decrypting same content
90067
Given the key, the plain text and the cipher text can I calculate the IV used in CBC mode?
64045
How do I find out what program 'owns' a hotkey?
121939
AES key equal to IV (CBC mode)
41240
Generating a cryptographically secure, many-time use, symmetric encryption key
111070
Is it safe to use the hash of the data as the key to encrypt them?
111766
Is it possible to make sense of an unknown language by means of cryptanalysis?