1. 名: 流密( Stream Cipher)、魔方(Magic Square)、存取(Random Access File)
A Study on the Stream Cipher Embedded Magic Square of Random Access FilesMagic square and stream cipher issue are very interest well-tried topic. In this paper, we are proposed a new scheme which stream cipher application for random access file that based on magic square method. By the way, there are two thresholds to secure ours data, if decrypts only by the stream cipher. It isn’t to recovery original source. In other hand, we improve the model of cipher stream to strong the defense efficiently, it also own high speed calculate to most parts of key stream generator.
Keywords: Stream Cipher, Magic Square, Key Stream Generator, Quadratic Residue
1. IntroductionSymmetric key cryptosystems are an important type of modern cryptosystem [1, 2, 4, 5, 8, 11, 13]. Symmetric key systems are cryptosystems where the same key is used for both encryption and decryption. This class of cryptosystem is important in modern cryptography because, in general, symmetric key cryptosystems are much faster than public key cryptosystems. Stream ciphers, on the other hand, process plaintext in small blocks (sometimes as small as a single bit). In contrast to block ciphers, stream ciphers keep some sort of memory, or state, as it processes the plaintext and uses this state as an input to the cipher algorithm [14-15]. In this paper, we are proposed a new scheme stream cipher contain magic matrix [3, 6, 7, 9, 10], to strong a random access file that you already to protect it. Section 2 will describe what kind of cipher schema did we concept in practice. Section 3 is discussing magic square that it will apply in random access file while encryption already implements early. Part 4, it is analysis the reliability with decrypt and encrypt; Conclusion and future research will be mention in final section.