With the scale of programs becoming increasingly bigger, and the complexity degree higher, how to select program fragments for slicing has become an important research topic. A new type of criterion called interesting...With the scale of programs becoming increasingly bigger, and the complexity degree higher, how to select program fragments for slicing has become an important research topic. A new type of criterion called interesting index is proposed for selecting parts of procedures or procedure fragments to do program slicing. This new criterion considers not only the subjective aspects in users, namely users' emphasis on the time efficiency, storage capacity or readability, but also the objective aspect in large procedures. It also represents the benefit of the users, while displaying the many-faceted roles that program slicing plays. In this way users call proceed with program slicing to large systems or unfinished systems.展开更多
CLEFIA(named after the French word "Clef" meaning "Key") is an efficient,highly secure block cipher proposed by SONY Corporation in the 14 th International Workshop on Fast Software Encryption(FSE-...CLEFIA(named after the French word "Clef" meaning "Key") is an efficient,highly secure block cipher proposed by SONY Corporation in the 14 th International Workshop on Fast Software Encryption(FSE-2007) and many cryptanalyses have been used to analyze it.According to the property of CLEFIA,a new technique Sandwich-Boomerang cryptanalysis is used on it.An 8-round Sandwich-Boomerang distinguisher of CLEFIA is constructed using the best differential characteristic of CLEFIA.And then,based on the distinguisher,an attack against 10-round CLEFIA is proposed.The number of chosen plaintexts required is 2^(119)(or 2^(120)) and the time complexity is 2^(120)(or 2^(121)).Compared with a 7-round impossible Boomerang distinguisher presented by Choy in the 4th International Workshop on Security(IWSEC-2009),the differential characteristics used in the attack are all the best ones,so it is believed that the attack is the best result that the Boomerang attacks can get on CLEFIA at present.展开更多
文摘With the scale of programs becoming increasingly bigger, and the complexity degree higher, how to select program fragments for slicing has become an important research topic. A new type of criterion called interesting index is proposed for selecting parts of procedures or procedure fragments to do program slicing. This new criterion considers not only the subjective aspects in users, namely users' emphasis on the time efficiency, storage capacity or readability, but also the objective aspect in large procedures. It also represents the benefit of the users, while displaying the many-faceted roles that program slicing plays. In this way users call proceed with program slicing to large systems or unfinished systems.
基金Supported by the National Science Foundation of China(No.60973161)the Doctoral Fund of Ministry of Education of China(No.200806140010)the National High Technology Research and Development Program of China(No.2009AA01Z422)
文摘CLEFIA(named after the French word "Clef" meaning "Key") is an efficient,highly secure block cipher proposed by SONY Corporation in the 14 th International Workshop on Fast Software Encryption(FSE-2007) and many cryptanalyses have been used to analyze it.According to the property of CLEFIA,a new technique Sandwich-Boomerang cryptanalysis is used on it.An 8-round Sandwich-Boomerang distinguisher of CLEFIA is constructed using the best differential characteristic of CLEFIA.And then,based on the distinguisher,an attack against 10-round CLEFIA is proposed.The number of chosen plaintexts required is 2^(119)(or 2^(120)) and the time complexity is 2^(120)(or 2^(121)).Compared with a 7-round impossible Boomerang distinguisher presented by Choy in the 4th International Workshop on Security(IWSEC-2009),the differential characteristics used in the attack are all the best ones,so it is believed that the attack is the best result that the Boomerang attacks can get on CLEFIA at present.
