Researchers have demonstrated a hybrid audio encryption framework combining ChaCha20 and non-linear transformations that achieves near-lossless reconstruction and mitigates leakage during stream ...

Cryptography is something of a cryptic field, if you’ll forgive the pun. While one researcher erects the walls of a new technique, another tries to smash it to pieces. Seemingly counterintuitive, near ...

An encryption method that works with continuous streams of input rather than fixed blocks. Bytes of plaintext go into the stream cipher, and bytes of encrypted text come out the other end. RC4 is an ...

Stream ciphers are symmetric key encrypting algorithms that work on single bits of the plaintext (Figure 2.7). While they are similar to the one-time pad, instead of XORing the message to a pure ...

It’s been more than 25 years since Ron Rivest invented his RC4 stream cipher, and after all that time it’s still being used widely, which is something of an achievement in the crypto world. However, ...

Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...