Simple but effective ciphers
15071
What is the most secure hand cipher?
21274
Security strength of RSA in relation with the modulus size
100640
K out of N encryption
133269
Symmetric encryption construction (meet-in-the-middle attack)
87659
SHA256 HMAC brute force with chosen plaintext attacks
111491
Affine Cipher Cryptanalysis
14827
RSA: Fast factorization of N if d and e are known
121251
Do known-plaintext attacks exist for public key encryption?
103956
Make AES more secure by randomising the blocks in an encrypted file
146532
Do any one-key-of-many cryptographic schemes exist?
138517
Is there a cryptography algorithm that will remain safe if P=NP?
124935
AES-CBC ciphertext manipulation with known IV and plaintext!
133525
Easily reversible hash functions as a method of data transmission
158946
Encryption algorithm for an app
18134
How do I securely store encryption keys in java?
33179
What are recommended, general strategies to start block-cipher design and/or analysis?
82535
Is a small size block cipher usable?