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Design a New Stream Cipher | ||
| Journal of College of Education | ||
| Article 1, Volume 0, Issue 1, 2017, Pages 358-374 | ||
| Authors | ||
| Zuheir H. Ali; Ali Shakir Mahmood; Salim Ali Al-Ageelee | ||
| Abstract | ||
| Recently, stream cipher systems are widely used in cryptographic applications, one reasons for their dominance in this area is the fact that they do not propagate errors, other reasons include ease of implementation and speed of operation. There are many different considerations must be kept in mind when generate a suitable encryption key. These criteria must be provide some of the necessary conditions for the security of the encryption key and satisfy all these conditions that are still be vulnerable to some attack. The object of this paper is to design a new stream cipher encryption system, based on using finite number of linear feedback shift registers (LFSR) and number of tables which differ in size and purposes. The new key generation design consists of a combination of five linear feedback shift registers, seven police circuits and two tables TAB1 (32*8 bit) and TAB2 (256*1 bit). The generating encryption keys must pass five standard statistical tests for randomness to be acceptable and used as encryption key, the accepted generated key is mixed with the plaintext bits by using XOR Boolean function to generate stream of binary ciphertext. | ||
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