Generic Approach for Encryption using Reverse Context Free Grammar Productions
Aishwarya R. Parab · International Journal for Research in Applied Science and Engineering Technology · 2018
The paper introduces a new symmetric key cryptosystem. This technique makes use of context free grammar as it presents an incredible cryptographic property that it is easy to generate and validate strings from a given grammar; however it is hard to identify a grammar given only the strings generated by it. The proposed idea consists of four modules: Encode, Encrypt, Decrypt and Decode. Firstly the file is encoded using the encoding techniques to obtain an intermediate text.The intermediate text is then encrypted to get the cipher text file using context free grammar along with the secret key.The secret key generated using random number generation algorithm.At the receiver side, the cipher text file is then decrypted using context free grammar followed by decoding techniques to obtain the original file.