By Masaya Sato, Toshihiro Yamauchi (auth.), Kazuo Sakiyama, Masayuki Terada (eds.)
This e-book constitutes the refereed complaints of the eighth overseas Workshop on safety, IWSEC 2013, held in Okinawa, Japan, in November 2013. The 20 revised chosen papers offered during this quantity have been conscientiously reviewed and chosen from sixty three submissions. they're equipped in topical sections named: software program and approach safety, cryptanalysis, privateness and cloud computing, public key cryptosystems, and safety protocols.
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Extra info for Advances in Information and Computer Security: 8th International Workshop on Security, IWSEC 2013, Okinawa, Japan, November 18-20, 2013, Proceedings
Since we analyze at binary level, P is binary program and i is assembly instruction. Potential Integer Overﬂow Points Searching. We consider arithmetics as potential integer overﬂow points. A potential integer overﬂow point p is denoted by a tuple (i, r, o), where i is program point which contain arithmetic, r is the arithmetic result which could overﬂow and o is the operand of the arithmetic. , where pc is the potential integer overﬂow point pj ’s propagation count before reaching the variable.
5 Experiments We carried out four experiments to evaluate our solver’s performance as well as assess the security of audio reCAPTCHA. We evaluated the performance of our solver in the former version of audio reCAPTCHA in the first experiment, and that of the current version in the second experiment. In the third experiment, we investigated how uncertainty in the number of digits in each cluster contributed to the security of reCAPTCHA where we evaluated accuracy by giving the ground truth number of digits in a cluster.
According to NVD, more than a half of integer overﬂow vulnerabilities belong to this type. Therefore, we give the MemoryAlloc type high weight. – Overﬂowed value using as memory index will cause arbitrary memory access, but it is few in existing integer overﬂow vulnerabilities, so it has low weight. – When overﬂowed value used as condition statement, the security checking may be bypassed, there are some existing integer overﬂow vulnerabilities belongs to this type, so we give it middle weight. – If programmers have checked whether arithmetic is overﬂowed, then the arithmetic is very likely not to cause integer overﬂow vulnerability, so it has a large negative weight.