'''Encryption''' is the technique of transforming a value by means of a
[cipher] in order to order to conceal its meaning.



** See Also **

   [cipher]:   Everything related to ciphers themselves.

   [Hash%|%hash functions]:   

   [Cryptkit]:   A Tcl binding to the well-known [http://www.cs.auckland.ac.nz/~pgut001/cryptlib/%|%Cryptlib] cryptography toolkit.

   [PGP]:   

   [tls]:   

   [SSL]:   

   [Huffman coding, part 2]:   A step towards compressing encryption, if you don't transmit the map.

   [Molebox encrypted Windows exe]:   

   [NaCl - Networking and Cryptography library (pronounced "salt")]:   

   [tcllib]:   Includes pure-Tcl implementations of the [des], [aes], [blowfish] and [rc4] ciphers. It also has implementations of the [md4], [md5], [sha1], [sha2] and [ripemd] message digest algorithms.

   https://github.com/dancal/tcl_mcrypt%|%Tcl binding to libmcrypt.%|%:   

   https://github.com/dancal/tcl_seed%|%Tcl binding to SEED encryption library.%|%:   

   https://github.com/d5c5ceb0/CryptoVe%|%CryptoVe%|%:   Tcl binding to MIRACL (Multiprecision Integer and Rational Arithmetic C Library) library.  MIRACL is self-described as "a C software library that is widely regarded by developers as the gold standard open source SDK for elliptic curve cryptography".



** Description **

Protocols like [SSH] and [SSL] work by using an [cipher%|%asymmetric cipher] to establish a symmetric key, and then using the symmetric key, which is more performant, for the remainer of the session.



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