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README.md

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BCR code

Install GMP

  1. Download GMP from https://gmplib.org
  2. In Terminal, cd to the gmp folder
  3. ./configure
  4. make
  5. sudo make install

Install GMP-ECM

  1. Download GMP ECM from http://gforge.inria.fr/projects/ecm/
  2. In Terminal, cd to the ecm folder
  3. ./configure
  4. make ecm-params
  5. make
  6. sudo make install

In the Terminal session, where you will build and execute the BCR code,

  1. export C_INCLUDE_PATH=/usr/local/include
  2. export LIBRARY_PATH=/usr/local/lib
  3. export LD_LIBRARY_PATH=/usr/local/lib
  4. export LD_RUN_PATH=/usr/local/lib

To build BCR decryption code and execute,

  1. cd /Project_1
  2. gcc bcr.c -lgmp
  3. ./a.out

The code takes 30 minutes to execute because of the prime factorization step. The final message is printed on the output screen.