Does composing multiple substitution ciphers improve security?
15207
Can insecure algorithms be combined to form a secure algorithm?
117232
Reduction from signatures to encryption?
135719
Solving Vigenère Encryption
114578
Design properties of the Rijndael finite field?
64578
How can an encryption scheme be indistinguishable with multiple messages but vulnerable to an adaptive chosen-plaintext attack?
44117
Symmetric vs. Asymmetric cryptographic approaches to data security
41888
How to prove that permutation and substitution ciphers satisfy H(X) = H(Y) in Shanon Entropy?
40853
Cipher vs. Cypher
21274
Security strength of RSA in relation with the modulus size
31454
IND-CPA security of mode of operation using triple AES with plaintext || IV+counter
40774
Is one time pad cipher reuse and random key secure?
90079
Theoretical pi-based stream cipher
98841
Is it okay to use an HMAC of the plaintext and a (possibly distinct) key as the IV for symmetric cryptography?
143064
Hill Cipher known plaintext attack
64779
A simple block cipher based on the SHA-256 hash function
64163
Using Chi-Square for Vigenère Cipher
68819
Timing attacks against RSA, DH and AES