Block and Stream Ciphers
Encryption algorithms can operate on blocks of data at a time, or bits and bytes of data, based on the type of cipher. Let’s compare the two methods.
Block Ciphers
A block cipher is a symmetric key (same key to encrypt and decrypt) cipher that operates on a group of bits called a block. A block cipher encryption algorithm may take a 64-bit block of plain text and generate a 64-bit block of cipher text. With this type of encryption, the same key to encrypt is also used to decrypt. Examples of symmetrical block cipher algorithms include the following:
Advanced Encryption Standard (AES)
Triple Digital Encryption Standard ...
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