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 ...

Abstract: In recent years, a variety of encryption algorithms have been investigated to image cryptosystems. Most of them are based on permutation and diffusion architecture. These two procedures are ...

A block cipher is an encryption method that applies a deterministic algorithm along with a symmetric key to encrypt a block of text, rather than encrypting one bit at a time as in stream ciphers. For ...

A proprietary algorithm developed by RSA Data Security, Inc., RC2 is an alternative to DES. The algorithm expands a single message by up to 8 bytes. RC2 is a block cipher that encrypts data in blocks ...

Stream Cipher encrypt data one byte (or bit) at a time using a key stream. A common simple example is using XOR with a pseudo-random key stream. DES (Data Encryption Standard) • Key and Encoding • ...

Abstract: In some encryption systems it is necessary to preserve the format and length of the encrypted data. This kind of encryption is called FPE (Format Preserving Encryption) or DPE (Datatype ...