##Function-preserving encryption schemes

A few interesting references and implementations

###Format-preserving encryption

http://blog.cryptographyengineering.com/2011/11/format-preserving-encryption-or-how-to.html

http://www.di-mgt.com.au/crypto-ffsem.html

http://botan.randombit.net/manual/fpe.html

###Order-preserving encryption

http://crypto.stackexchange.com/questions/3813/how-does-order-preserving-encryption-work

(Flawed) implementation https://github.com/Bren2010/caesar/blob/master/opse.coffee

C implementation of hypergeometric distribution https://svn.r-project.org/R/trunk/src/nmath/rhyper.c

Fortran implementation of hypergeometric distribution https://raw.githubusercontent.com/CryptDB/cryptdb/master/doc/notes/668.txt

###Searchable encryption

(Flawed) implementation https://github.com/wanasit/searchable-encryption-js

http://www.slideshare.net/cfrenz/searchable-encryption-systems

###Deterministic encryption

Go implementation of AES-SIV/CMAC https://github.com/jacobsa/crypto

Ada implementation of AES-SIV/CMAC https://github.com/cforler/Ada-Crypto-Library/blob/master/src/crypto-symmetric-mac-cmac.adb https://github.com/cforler/Ada-Crypto-Library/blob/master/src/crypto-symmetric-mac-cmac.adb

RFCs http://tools.ietf.org/rfc/rfc4493.txt http://tools.ietf.org/html/rfc5297

###Additive homomorphic encryption

(Flawed) implementation http://searchcode.com/codesearch/view/17793309

Python implementation https://github.com/mikeivanov/paillier