By Fuchun Guo, Yi Mu, Willy Susilo, Vijay Varadharajan (auth.), Mark D. Ryan, Ben Smyth, Guilin Wang (eds.)
This ebook constitutes the refereed lawsuits of the eighth foreign convention on details protection perform and event, ISPEC 2012, held in Hangzhou, China, in April 2012. The 20 revised complete papers offered including 7 work-in-progress papers have been conscientiously reviewed and chosen from 109 submissions. The papers are geared up in topical sections on electronic signatures, public key cryptography, cryptanalysis, differential assaults, oblivious move, net safeguard, key administration, utilized cryptography, pins, basics, fault assaults, and key recovery.
Read or Download Information Security Practice and Experience: 8th International Conference, ISPEC 2012, Hangzhou, China, April 9-12, 2012. Proceedings PDF
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Extra resources for Information Security Practice and Experience: 8th International Conference, ISPEC 2012, Hangzhou, China, April 9-12, 2012. Proceedings
This is similar to the standard indistinguishability notion for encryption schemes. We say that a RSS for documents is private, iﬀ for any eﬃcient (PPT) adversary A the probability that the game depicted in Fig. 5 returns 1, is negligibly close to 12 (as a function of λ). ,sk,b) (pk) where oracle LoRRedact for input m0 , m1 , mod0 , mod1 : if mod0 (m0 ) = mod1 (m1 ), return ⊥ (m, σ) ← Sign(sk, mb ) return (m , σ ) ← Redact(pk, m, σ, modb ). return 1 iﬀ b = d Experiment Unforgeability RSS A (λ) (pk, sk) ← KeyGen(1λ ) ∗ ∗ Sign(sk,·) (m , σ ) ← A (pk) let i = 1, 2, .
Springer, Heidelberg (2003) 4. : Redactable Signatures for Tree-Structured Data: Deﬁnitions and Constructions. , Yung, M. ) ACNS 2010. LNCS, vol. 6123, pp. 87–104. Springer, Heidelberg (2010) 5. : Security of Sanitizable Signatures Revisited. , Tsudik, G. ) PKC 2009. LNCS, vol. 5443, pp. 317–336. Springer, Heidelberg (2009) 6. : Unlinkability of Sanitizable Signatures. , Pointcheval, D. ) PKC 2010. LNCS, vol. 6056, pp. 444–461. Springer, Heidelberg (2010) 7. : On Extended Sanitizable Signature Schemes.
Our main idea is to avoid the computation of exponent inversion by hiding g μ l instead of g μt into S. Concretely, the ciphertext is (R = g μ2 K , S = |X μt Y μ |), the l encapsulated key is K = BBSN (g μ ), where h ∈ QRN , g = h2 , X = g x2 K , Y = lK g y2 h, (x, y) ∈ [(N − 1)/4] is the private key. Thus, the decapsulation computes g μ = S 2 /R2(xt+y) directly. The main diﬃculty is the security proof of this new variant. To construct lK lK ∗ the challenge ciphertext, the simulator may set X = g x2 h−1 , Y = g y2 ht ∗ (to construct S ∗ without hμ ).