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SSLeay
A SSL protocol and the cryptographic algorithms used by SSL, developed by Eric Young. It is available worldwide, and has become a cornerstone for cryptography developers wishing to avoid US export regulations. Usage within the United States has not been legally tested but is likely to be controversial because of the US patent on RSA. Eric Further development is now continued under the name OpenSSL by a team of developers.
Stream Cipher
A stream cipher encrypts small units of data, often a bit or a byte at a time, but unlike a basic block cipher the output to a given input will depend on where it occurs. The simplest type of stream cipher generates a psuedo-random sequence which is then combined with the input with bytewise addition.
Symmetric Cryptography
A symmetric cipher is one in which the same key encrypts and decrypts, as a secure method when the sender and recipient can agree on a key. CAST, DES, IDEA, RC2 and RC4 are examples of symmetric ciphers.
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