The research of OFB-DES mode in the encrypt of data
Cong Jiu Zhong · Journal of Shenyang Institute of Aeronautcal Engineering · 2005
The transmission of data is requested grimly more and more for the progress of the technique of the computer and communicate .The secrecy and safety of data is very necessary . The operator schema of OFB arithmetic is one of four kinds of all-purpose encryption standard of DES. This article introduces the principle of encryption and decipherment and the operation process of this arithmetic. MI is from LFSR register. The cryptograph is from the operation of plaintext and MI after being operated by DES.The decryption is an athwart course.In order to strengthen cryptogrammic security, the article adopts the model of 64-bit OFB. It is more fit for the encryption of digital audio frequency and video frequency based on without error diffusion.