By Bart De Decker, André Zúquete
This ebook constitutes the refereed court cases of the fifteenth IFIP TC 6/TC eleven foreign convention on Communications and Multimedia safety, CMS 2014, held in Aveiro, Portugal, in September 2014.
The four revised complete papers provided including 6 brief papers, three prolonged abstracts describing the posters that have been mentioned on the convention, and a pair of keynote talks have been conscientiously reviewed and chosen from 22 submissions. The papers are equipped in topical sections on vulnerabilities and threats, identity and authentification, utilized safety.
Read Online or Download Communications and Multimedia Security: 15th IFIP TC 6/TC 11 International Conference, CMS 2014, Aveiro, Portugal, September 25-26, 2014. Proceedings PDF
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Extra info for Communications and Multimedia Security: 15th IFIP TC 6/TC 11 International Conference, CMS 2014, Aveiro, Portugal, September 25-26, 2014. Proceedings
Instead of ignoring it, we should decrease his importance. Fig. 5. Features weights study Finally, the transient study was repeated but this time taking into account the previous best conﬁgurations (the best acceptance neighbourhood parameters and the best weights previously presented). Fig. 6 shows S(AS(l)) for diﬀerent values of l. As we can see, the value stays stable during all the reduction process (starting with l = 750). After 20 reductions, the value shows no relevant ﬂuctuations. This means a reduction of 80%, equivalent to a reduction of around 600 keys.
The classical example for transients is the harmonic oscillator. In our mechanism, we have S(AS(l))l→∞ −→ a with a representing the characteristic value for the user (in theory close to 1). Here, the transients are the values we get when l is too small and, consequently, are not user representative. Identifying the minimum l for which we do not have any more transients means identifying the minimum size of the sample to get a reasonable value for a. Fig. 3 shows the transients study using 3 samples with 750 keys each from 3 diﬀerent users.
We can thus send AT commands to make phone calls or send SMS to premium cost numbers. This way making the attacker earn money, or more accurately stealing it. Complementing this, some manufacturers extend this list, adding some proprietary commands, with the purpose of enabling control and capabilities that they want to have on the system. These commands are private and manufacturers do not publish them. But without the use of some form of encryption, anyone is able to eavesdrop the communication channel and try to understand, what lies under the system.