ID-PKC

This Identity Based Encryption method was invented by Cliff Cocks
See http://www.cesg.gov.uk/technology/id-pkc/index.htm for more details.

This demonstration implementation consists of four programs that implement 
each of the four steps in the algorithm. The source code is intended to be 
read in conjunction with the academic paper which describes the method. The 
clarity of C++ makes the code very readable, and easy to associate with the 
mathematical description.

NOTE: This method is patented! Do not deploy before checking with the patent 
holders. This is just a demonstration of the method, and lacks some
functionality in its current state.

Tested with MS C++, Borland C++ and the DJGPP port of gcc


Function: SETUP

Source File: ipk_set.cpp

This program generates suitable random global domain parameters, and stores 
them in the file common.ipk. The Master key is stored in master.ipk

Compile as (for example with MS C++)

cl /O2 ipk_set.cpp big.cpp miracl.lib



Function: EXTRACT

Source File: ipk_ext.cpp

This program extracts a private (secret) key from the proffered identity 
string, and stores it in the file private.ipk

Compile as 

cl /O2 ipk_ext.cpp big.cpp crt.cpp miracl.lib



Function: ENCRYPT

Source File: ipk_enc.cpp

This program accepts the identity of the recipient (which is his public key), 
and encrypts a file.

Compile as 

cl /O2 ipk_enc.cpp big.cpp miracl.lib



Function: DECRYPT

Source File: ipk_dec.cpp

This program decrypts a file using the private key from private.ipk

Compile as (for example with MS C++)

cl /O2 ipk_dec.cpp big.cpp miracl.lib


Run the four programs in the order above, and encrypt a file to yourself!