Research On Multiple Cryptographic Sequences On Variant Maps

In the modern network environment,everyone produces,stores and transmits a large variety of multimedia data in the network environment:documents,voice,and video.But are processed,transmitted and stored in an insecure network environment.An effective technique for dealing with this type of risk is data encryption.In the era of big data,cyberspace security needs to be built under a suitable encryption system to ensure data confidentiality during transmission and storage.The stream cipher algorithm can provide effective security in the transmission of multimedia data.Shannon proposed to maintain statistical independence~1 between plaintext and ciphertext to achieve statistical security.The random sequence generated by the random number generator is used to encrypt the plaintext to achieve statistical independence between the plaintext and ciphertext.It is extremely difficult to prove the random quality of the sequence produced by the random number generator by theoretical methods.It is generally of equal importance to study the random sequence generator and random sequence evaluation methods~2.Statistical method as a basic and effective analysis tool~3 is very effective for stream cipher and pseudo-random sequence.Variant measurement is a kind of analysis method suitable for time series.Based on the variant measurement parameters,this paper discusses the statistical graphs of six kinds of variable value measurement for 01 encrypted sequence:one-dimensional p-statistical graph,two-dimensional p-statistical graph,one dimensional p-statistical graph,two-dimensional q-statistical graph,two-dimensional pq-statistical graph,and peak stability graphs.Based on the variant measurement method,6 methods in the NIST statistical measurement method were visually analyzed and compared.Using the variant diagram,the quantum sequence,aes-256-cbc/RC4 encryption algorithm and its variants encryption sequence stream are graphically analyzed.Through comparative analysis,it is verified that the variant graphing method proposed in this paper can get the features that the p-value method could not find and provide abundant information from a new perspective.The peak stability plot shows a clear distinction among quantum sequence,aes-256-cbc and RC4 sequence.