README.md

Parallelization-of-DES-Algorithm-Using-Open-MP

1. Parallel Implementation of DES Algorithm

For the parallel Implementation of DES Algorithm, plain text is read from the plaintext.txt file and stored in a string. The string is divided into strings with length=8 each and stored in string array. Then, the divided strings stored in arrays are parallely encrypted and decrypted. Vectors are also used for making the process easy.

Why length=8 is taken for splitting the string?

The ASCII value is taken into consideration and an alphabet corresponds to 8 bit binary when ASCII is taken into consideration.

2. S Box Parallelism

S box is separately parallelized and the implementation code is available in Codes folder. S Box parallelism consumed more time than Technique 1. This might be due to thread overhead.

3. Nested Parallelism

For Nested Parallelism, Technique 1 and 2 are combined. Nested Parallelism also consumed more time than technique 1. This also might be due to thread overhead.

4. Serial Implementation of DES Algorithm

The serial implementation of DES Algorithm is also done and the code is available in Codes folder of the repository.

Note: Don't forget to create plaintext.txt file and the text to be encrypted and decrypted should be there inside the file. Also, don't forget to download matrices.h and numberConversions.h header files.