New PDF release: Communications and Multimedia Security. Advanced Techniques

By Alwyn Goh, David C. L. Ngo (auth.), Antonio Lioy, Daniele Mazzocchi (eds.)

This booklet constitutes the refereed court cases of the seventh IFIP foreign convention on Communications and Multimedia safety, CMS 2003, held in Torino, Italy in October 2003.

The 21 revised complete papers awarded have been rigorously reviewed and chosen for presentation. The papers are geared up in topical sections on cryptography, community safety, cellular and instant community safety, belief and privateness, software safeguard, and multimedia safeguard.

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Read or Download Communications and Multimedia Security. Advanced Techniques for Network and Data Protection: 7th IFIP-TC6 TC11 International Conference, CMS 2003, Torino, Italy, October 2-3, 2003. Proceedings PDF

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Extra info for Communications and Multimedia Security. Advanced Techniques for Network and Data Protection: 7th IFIP-TC6 TC11 International Conference, CMS 2003, Torino, Italy, October 2-3, 2003. Proceedings

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V messages/sec a. b.  .   .  v messages/sec a. Tmes in seconds Tmes in seconds Fig. 6. Tmes versus v for L = 1 Mbits and TAES = 1 Gbps: a. C = 10 Gbps b. C = 1 Gbps  .   .  v messages/sec b. Fig. 7. Tmes versus v for L = 1 Mbits and TAES = 1 Mbps: a. C = 10 Gbps b. C = 1 Gbps 5 Conclusions In the present paper, a new protocol for authentication and key distribution called the AUTHMAC_DH is proposed. In order to provide authentication of the exchanged messages during authentication and key distribution, the AUTHMAC_DH protocol uses the Message Authentication Codes (MAC) to exchange the Diffie-Hellman components.

ZNR multi-unsigncryption i∈R Compute Ei ↓ Ei C Compute ∀ε i and E Recover 〈µ, ν〉 = F(E) Recover m = Dµ(c) Use ν to confirm r with Schnorr-Zheng/NR differentiation only in the final confirmation ie h ν(m) = r and ν = r + h(m) respectively. This formulation can be used in conjunction with single/multi-sender signcryption protocols of Tables 1(b), 6 and 10; the last of which prevents protocol-sabotage via malformed signcryption-shares. This ZNR extension is also more compute-efficient on the combiner-side—by 2M, due to non-computation of k—compared with the equivalent TNR operation.

Individual users—of which there are n, indexed i ∈ U—would then be assigned polynomial-associated private key-shares a i = e(i) mod q , which are essentially a k-th share of a if e is secret. This arises from the necessity of at least k datapoints of form 〈i, e(i)〉 for finite-field Lagrange interpolation ie  x − j  (mod q) . Evaluation of this expression results in e(x) = ∑ e(i)  ∏   i − j i ∈S  j ∈ S − {i}  j e(0) = a = ∑ εia i (mod q) with index-coefficient εi = (mod q) for ∏ i ∈S j ∈ S − {i} j − i any k-sized subset S ⊂ U.

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