improvement and analysis of vdp method in time/memory tradeoff applications

ISCAS OpenIR

	improvement and analysis of vdp method in time/memory tradeoff applications
	Wang Wenhao; Lin Dongdai; Li Zhenqi; Wang Tianze
	2011
会议名称	13th International Conference on Information and Communications Security, ICICS 2011
会议录名称	Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
页码	282-296
会议日期	November 2
会议地点	Beijing, China
收录类别	EI ; SPRINGER
ISSN	0302-9743
ISBN	9783642252426
部门归属	(1) SKLOIS Institute of Software Chinese Academy of Sciences Beijing China; (2) Graduate University Chinese Academy of Sciences Beijing China
摘要	In many cases, cryptanalysis of a cryptographic system can be interpreted as the process of inverting a one-way function. TMTO is designed to be a generic approach that can be used on any one-way function independent of the structure of the specific target system. It was first introduced to attack block ciphers by Hellman in 1980. The distinguished point (DP) method is a technique that reduces the number of table look-ups performed by Hellman's algorithm. A variant of the DP (VDP) method is introduced to reduce the amount of memory required to store the pre-computed tables while maintaining the same success rate and online time. Both the DP method and VDP method can be applied to Hellman tradeoff or rainbow tradeoff. We carefully examine the technical details of the VDP method and find that it is possible to construct functions for which the original method fails. Based on the analysis, we propose a modification of the VDP method. Furthermore, we present an accurate version of the tradeoff curve that does not ignore the effect of false alarms and takes storage reduction techniques into consideration. We find optimal parameter sets of this new method by minimizing the tradeoff coefficient. A more exact and fair comparison between tradeoff algorithms is also given, which shows that our method applied to the Hellman tradeoff performs best among them. © 2011 Springer-Verlag.; In many cases, cryptanalysis of a cryptographic system can be interpreted as the process of inverting a one-way function. TMTO is designed to be a generic approach that can be used on any one-way function independent of the structure of the specific target system. It was first introduced to attack block ciphers by Hellman in 1980. The distinguished point (DP) method is a technique that reduces the number of table look-ups performed by Hellman's algorithm. A variant of the DP (VDP) method is introduced to reduce the amount of memory required to store the pre-computed tables while maintaining the same success rate and online time. Both the DP method and VDP method can be applied to Hellman tradeoff or rainbow tradeoff. We carefully examine the technical details of the VDP method and find that it is possible to construct functions for which the original method fails. Based on the analysis, we propose a modification of the VDP method. Furthermore, we present an accurate version of the tradeoff curve that does not ignore the effect of false alarms and takes storage reduction techniques into consideration. We find optimal parameter sets of this new method by minimizing the tradeoff coefficient. A more exact and fair comparison between tradeoff algorithms is also given, which shows that our method applied to the Hellman tradeoff performs best among them. © 2011 Springer-Verlag.
关键词	Algorithms Cryptography
主办者	National Natural Science Foundation of China (NNSFC); The Microsoft Corporation; Beijing Tip Technology Corporation; Trusted Computing Group (TCG)
语种	英语
内容类型	会议论文
URI标识	http://ir.iscas.ac.cn/handle/311060/16208
专题	中国科学院软件研究所
推荐引用方式 GB/T 7714	Wang Wenhao,Lin Dongdai,Li Zhenqi,et al. improvement and analysis of vdp method in time/memory tradeoff applications[C],2011:282-296.