Possibility of the encrypted text being the same as the supplied plain text!
35531
Block cipher fixed points (plaintext equal to ciphertext)
87736
Has a SHA256 output ever been found consisting entirely of the same character?
12035
XOR cipher with fixed key and known relation among plaintexts
93860
Vulnerabilities if encrypting the same data with 2 different keys
35475
Encrypting the password
101618
How can I make my AES encryption identical between Java and Objective-C (iPhone)?
14473
How to determine the encoding of text?
54104
Is the file Encrypted with AES?
139568
Can double-encrypting be easier to break then either algorithm on its own?
31454
IND-CPA security of mode of operation using triple AES with plaintext || IV+counter
136845
What is the probability of any two users generating the same 128, 256, 2048 bit key?
98841
Is it okay to use an HMAC of the plaintext and a (possibly distinct) key as the IV for symmetric cryptography?
141256
Is modern encryption needlessly complicated?
29867
Using the same secret key for encryption and authentication in a Encrypt-then-MAC scheme
103956
Make AES more secure by randomising the blocks in an encrypted file
111070
Is it safe to use the hash of the data as the key to encrypt them?
121939
AES key equal to IV (CBC mode)