Abstract: Aiming at the problems of data security and privacy protection in big data environment, a hyperchaotic data encryption algorithm based on Hadoop big data platform is proposed. The dynamic behavior of hyperchaotic Lorenz system is more complex and the generated sequence has better characteristics of randomness, combined with MapReduce parallel programming model, an cipher algorithm with higher efficient and safety is designed. Experimental results show that compared with the AES algorithm, the efficiency of the proposed algorithm is improved by nearly 40%. In security aspect, the algorithm has the characteristics of large key space and good key sensitivity.

Key words: big data security, chaotic cryptography, hyperchaos, Hadoop