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Research on Power Analysis and Experimental Verification of Two Common Cryptosystems

Author: ChengWei
Tutor: GuDaWu
School: Shanghai Jiaotong University
Course: Computer System Architecture
Keywords: Bypass attack Power Analysis Attacks Protect RSA COMP128
CLC: TP309
Type: Master's thesis
Year: 2011
Downloads: 24
Quote: 0
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Abstract


Password technology is the core technology of information security, its security is usually determined by the consideration for the mathematical analysis of the algorithm. However, in practical applications, cryptographic algorithms, often through various passwords chip to implement, its security is not only associated with using the cryptographic algorithm, and also relates to a program implementation and hardware design. Bypass attacks as an important branch of the password works, it combines the algorithm internal characteristics and algorithms the bypass information leaked out of the execution, by reducing the key search space even direct access to the correct key to attack. Bypass attacks, power analysis attacks most threatening is the easiest to implement, so much attention of cryptography researchers. RSA is widely recognized as the most mature and perfect in the theoretical and practical application of public key cryptography algorithm, one can not only be encrypted, and can also be used for digital signatures and authentication, and subject to a wide range of applications in the field of payment and certification. The COMP128 algorithm are the GSM protocols between the SIM card and a base station in the algorithm used by the authentication and key negotiation and the domestic GSM systems mostly use the algorithm. Expand the focus of this paper, two commonly used cryptographic system, the proposed power analysis attack, and experimental verification, based on the protection program. Work and innovation of the main points are as follows: 1, to build experimental hardware and software platforms, defined experimental platform for the design of the structure and function of each part, the use of experimental verification of this experimental platform of attack methods and protective. The platform can be extended according to the need for a follow-up study. RSA algorithm and its various implementations, the study on the basis of existing attacks, to improve the existing power analysis method, and propose a new method of attack. Previous work has shown that RSA and can not resist the power analysis is not high, but the efficiency of these methods of attack. Improved attack methods to improve the efficiency of the attack to reduce the number of attacks the power required curve, new methods of attack from a different angle algorithm attacks, increase the difficulty of the protection. 3 COMP128 algorithm for power analysis are given for the attacks of COMP128 algorithm. Experiment, and the SIM card used in the daily life, the successful realization of the COMP128 algorithm power analysis attacks, the experimental results show that the algorithm in there are significant security vulnerabilities. 4, by a pair RSA and COMP128 of, power analysis research, we found that the vulnerability of its existence, the proposed protective mask, so that power consumption is difficult to be exploited by attackers.

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > General issues > Security and confidentiality
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