Applied Cryptography and Network Security: 14th by Mark Manulis, Ahmad-Reza Sadeghi, Steve Schneider

By Mark Manulis, Ahmad-Reza Sadeghi, Steve Schneider

This ebook constitutes the refereed complaints of the 14th overseas convention on utilized Cryptography and community safety, ACNS 2016, held in Guildford, united kingdom. in June 2016. five. The 35 revised complete papers incorporated during this quantity and provided including 2 invited talks, have been rigorously reviewed and chosen from 183 submissions.ACNS is an annual convention concentrating on cutting edge learn and present advancements that strengthen the parts of utilized cryptography, cyber safety and privateness.

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Extra info for Applied Cryptography and Network Security: 14th International Conference, ACNS 2016, Guildford, UK, June 19-22, 2016. Proceedings

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We then explain what additional security benefits we provide with our work. The Pico is a security token containing hundreds of login credentials, stored in encrypted form in the token’s permanent memory. 1 Without the master key, which is not stored in the Pico, the encrypted credentials are unreadable. The intention is that, if adversaries capture the Pico, they will not be able to read its secrets, not even if they also capture a few Picosiblings. No protection is offered by the scheme, though, if the adversary manages to capture the Pico and at least k Picosiblings.

Clients minimize the risk of compromising the shared key by only storing a (one-way) function of that, and the client key, never the operator key in clear. The design of the AKA protocol is influenced by three important constraints. One is that (current and older) SIM cards, cannot generate (pseudo)random numbers. Thus, freshness has to be guaranteed without client randomness. The second constraint is that the (necessary) communication3 between servers and operators in the roaming scenario is usually expensive.

These properties are: 1. Key-indistinguishability: the derived session keys are indistinguishable from random by a MiM attacker placed between the client and a server with black-box access to all operators. 2. Client- and server-impersonation: a MiM attacker cannot impersonate honest servers (to the client), or clients (to an honest server). Due to the identification phase, AKA resists client impersonations better than server impersonations. 22 S. Alt et al. 3. State-confidentiality: (malicious) servers cannot learn: the client’s secret key, the operator’s secret key, nor their state.

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