By Feng Hao, Dylan Clarke (auth.), Feng Bao, Pierangela Samarati, Jianying Zhou (eds.)
This ebook constitutes the refereed lawsuits of the tenth overseas convention on utilized Cryptography and community safeguard, ACNS 2012, held in Singapore, in June 2012.
The 33 revised complete papers integrated during this quantity have been conscientiously reviewed and chosen from 192 submissions. they're prepared in topical periods on authentication, key administration, block ciphers, identity-based cryptography, cryptographic primitives, cryptanalysis, aspect channel assaults, community defense, internet safeguard, protection and privateness in social networks, safeguard and privateness in RFID platforms, safeguard and privateness in cloud structures, and defense and privateness in clever grids.
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Extra info for Applied Cryptography and Network Security: 10th International Conference, ACNS 2012, Singapore, June 26-29, 2012. Proceedings
Ben-David et al. then the robustness of the XOTP notion and how it can be used in conjunction with additional techniques (which are realizable on smartphones and are implementable as support and extensions of OTP software) to deal with extended set of attackers exploiting typical weaknesses of web technologies. 3 Possible Contextual Factors We present several candidates for a contextual factor and the protection each of them gives against Man-In-The-Network (MITN) attacks, still relating to the client as a single entity.
13(c). Therefore, to improve the security of an animated CAPTCHA scheme, it is advisable to use a variable number of frames with information randomly distributed over the frames, even if this means increasing the complexity of generating the animated CAPTCHAs. The frame delay. If care is not taken, the frame delay can also be exploited to break animated CAPTCHAs. For example, in the Swapper/Default HelloCaptcha type, the correct solution is contained in the frame which has the longest delay time.
C computes XOT P = P RF (keyS,C , ChalS,C ||ID||nonce||XFSess ) and sends the computed XOT P to S. 2. S veriﬁes the received XOT P by applying the same computation. Correctness: In, both, the current protocol and the contextual factor protocol the challenge CHALS,C , the ID, the nonce and the contextual factor XFSess (in the contextual-factor protocol) are known to both parties: The challenge has been assumed to be synchronized, the ID can be inferred from the claimed user name, the nonce if exists is sent over, and the contextual factor is assumed to be known to both parties.