Dual-chaotic system dynamic key and RSA jointed streaming media secret communication method
A system dynamic and secure communication technology, applied in transmission systems, digital transmission systems, secure communication devices, etc., can solve problems such as poor confidentiality, inability to use streaming media communication in the system, and potential safety hazards
Active Publication Date: 2015-05-13
HARBIN UNIV OF SCI & TECH
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Problems solved by technology
[0004] In order to solve the problem that the key sequence generated by the ultra-chaotic system in the existing secure communication method based on chaos is slow, the system cannot be applied to streaming media communications with large data volume and high real-time performance; at the same time, the key sequence generated by a single chaotic system The complexity is low, the root key is not effectively protected during network transmission, there are certain security risks, and the problem of poor confidentiality
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specific Embodiment approach 1
[0061] Embodiment 1: This embodiment describes in detail the streaming media secure communication method combined with the dynamic key of the dual chaotic system and RSA:
[0062] 1. RSA encryption algorithm and hyperchaotic system
[0063] 1.1 Principle of RSA Algorithm
[0064] The RSA algorithm is divided into two processes: key generation and encryption and decryption, which are as follows:
[0065] Step 1 Key generation:
[0066] 1) Randomly generate two large prime numbers p and q;
[0067] 2) Calculate n=p×q and Euler function Φ(n)=(p-1)(q-1);
[0068] 3) Select e that satisfies gcd(e,Ф(n))=1, where e is 0
[0069] 4) Calculate the d value that satisfies d×e≡1(mod,Ф(n)), and the decryption key is (d,n).
[0070] Step 2 Encryption and decryption process:
[0071] 1) Encryption operation: perform c=m on plaintext m e (mod n) operation to obtain the ciphertext c;
[0072] 2) Decryption operation: perform m=c on ...
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A dual-chaotic system dynamic key and RSA jointed streaming media secret communication method relates to the technical field of communication encryption and solve the problem of certain potential safety hazards and poor secrecy of streaming media communication due to the fact that the root key is not effectively protected in the network transmission process of streaming media communication. Chaotic system parameters, iterative step length generated in a chaotic sequence and the preset iteration times serve as dynamic parameters, values meeting the conditions are generated randomly before each communication and form the root key, and the root key is subject to secrecy synchronization through the RSA algorithm. Difference of root keys makes the chaotic key sequences used for each encryption and deception are different. Meanwhile, the chaotic key sequences are formed by interweaving combination of two hyper-chaotic sequences so the chaotic key sequences are more complicated. The dual-chaotic system dynamic key and RSA jointed streaming media secret communication method reduces the generating time of the chaotic key sequences and improves the encryption speed. Testing of software written through C programming language in the local area network proves that the dual-chaotic system dynamic key and RSA jointed streaming media secret communication method can meet requirements of streaming media communication for safety and timeliness.
Description
technical field [0001] The invention relates to a streaming media secure communication method, and relates to the technical field of communication encryption. Background technique [0002] With the rapid development of network and streaming media technology, users can watch live online, video chat and other functions through the network. At the same time, the stealing technology of the network is also constantly escalating. This requires that the information in the network be encrypted to ensure its security [1] . Sequence cipher encryption has the characteristics of high efficiency, scrambled plaintext statistics, error-free transmission, etc., and has become one of the most widely used cipher systems at present. [2] . Chaos is a kind of random motion, which is a deterministic, abstract random-like process that appears in nonlinear systems. It is extremely sensitive to initial values and system parameters, which makes it suitable for use in cryptography. [3] . The R...
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Inventor 康守强王玉静谢金宝纪彬兰朝凤高华强
Owner HARBIN UNIV OF SCI & TECH
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