RC4 (Rivest Cipher 4) is a stream cipher designed by Ron Rivest in 1987. It is one of the most widely used encryption algorithms, known for its simplicity and speed in software implementations. Here are some key points about RC4: 1. **Stream Cipher**: Unlike block ciphers that encrypt fixed-size blocks of data (e.g., AES), RC4 encrypts data one byte at a time, making it a stream cipher.
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