A Wrapping Encryption Based on Double Randomness Mechanism  

作　　者：Yi-Li Huang Fang-Yie Leu Ruey-Kai Sheu Jung-Chun Liu Chi-Jan Huang 

机构地区：[1]Department of Computer Science,Tunghai University,Taichung,40764,Taiwan [2]Emergency Response Management Center,Ming Chung University,Taipei,11103,Taiwan [3]General Education Center,Ming Chuan University,Taipei,11103,Taiwan

出　　处：《Computers, Materials & Continua》2023年第10期1143-1164,共22页计算机、材料和连续体（英文）

基　　金：supported in part by Ministry of Science and Technology(MOST),Taiwan under the Grant MOST 109-2221-E-029-017-MY2.

摘　　要：Currently,data security mainly relies on password(PW)or system channel key(SKCH)to encrypt data before they are sent,no matter whether in broadband networks,the 5th generation(5G)mobile communications,satellite communications,and so on.In these environments,a fixed password or channel key(e.g.,PW/SKCH)is often adopted to encrypt different data,resulting in security risks since thisPW/SKCH may be solved after hackers collect a huge amount of encrypted data.Actually,the most popularly used security mechanism Advanced Encryption Standard(AES)has its own problems,e.g.,several rounds have been solved.On the other hand,if data protected by the same PW/SKCH at different time points can derive different data encryption parameters,the system’s security level will be then greatly enhanced.Therefore,in this study,a security scheme,named Wrapping Encryption Based on Double Randomness Mechanism(WEBDR),is proposed by integrating a password key(or a system channel key)and an Initialization Vector(IV)to generate an Initial Encryption Key(IEK).Also,an Accumulated Shifting Substitution(ASS)function and a three-dimensional encryption method are adopted to produce a set of keys.Two randomness encryption mechanisms are developed.The first generates system sub-keys and calculates the length of the first pseudo-random numbers by employing IEK for providing subsequent encryption/decryption.The second produces a random encryption key and a sequence of internal feedback codes and computes the length of the second pseudo-random numbers for encrypting delivered messages.A wrapped mechanism is further utilized to pack a ciphertext file so that a wrapped ciphertext file,rather than the ciphertext,will be produced and then transmitted to its destination.The findings are as follows.Our theoretic analyses and simulations demonstrate that the security of the WEBDR in cloud communication has achieved its practical security.Also,AES requires 176 times exclusive OR(XOR)operations for both encryption and decryption,while the WEBDR consumes only 3 o

关 键 词：Initial encryption key accumulated shifting substitution three-dimensional operation wrapped ciphertext file 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]