Information Security and Privacy: 21st Australasian by Joseph K. Liu, Ron Steinfeld

By Joseph K. Liu, Ron Steinfeld

The two-volume set LNCS 9722 and LNCS 9723 constitutes the refereed court cases of the twenty first Australasian convention on info safety and privateness, ACISP 2016, held in Melbourne, VIC, Australia, in July 2016.

The fifty two revised complete and eight brief papers offered including 6 invited papers during this double quantity have been rigorously reviewed and chosen from 176 submissions. The papers of half I (LNCS 9722) are prepared in topical sections on nationwide defense Infrastructure; Social community safeguard; Bitcoin defense; Statistical privateness; community safeguard; shrewdpermanent urban safety; electronic Forensics; light-weight safeguard; safe Batch Processing; Pseudo Random/One-Way functionality; Cloud garage safety; Password/QR Code safeguard; and useful Encryption and Attribute-Based Cryptosystem. half II (LNCS 9723) includes themes corresponding to Signature and Key administration; Public Key and Identity-Based Encryption; Searchable Encryption; Broadcast Encryption; Mathematical Primitives; Symmetric Cipher; Public Key and Identity-Based Encryption; Biometric safety; electronic Forensics; nationwide defense Infrastructure; cellular protection; community defense; and Pseudo Random / One-Way Function.

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Extra info for Information Security and Privacy: 21st Australasian Conference, ACISP 2016, Melbourne, VIC, Australia, July 4-6, 2016, Proceedings, Part II (Lecture Notes in Computer Science)

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Signature Ssk (m): it produces a signature σ ← Ssk (m) for a message m using the secret key sk. Verification Vpk (m, σ): it tests whether σ is a valid signature for message m using the public key pk. The algorithm outputs either 1 (valid) or 0 (invalid). 4 Security Model for Existential Unforgeability The de facto security notion is existential unforgeability under adaptive chosen message attacks [6] which is defined using the following game. Setup: The challenger runs G. It gives the adversary the resulting public key pk and keeps the private key sk to itself.

C simulates as defined above. – Output. Finally, A outputs b as its guess on b. 0 ( ). One can note the We define the advantage of A in game G0 as AdvGA,OSBE definition of game G0 is exactly the original model of semantic security and thus 0 ( ) = AdvSS we have AdvGA,OSBE A,OSBE ( ). Game G1 . Let game G1 be the same game as G0 , except that in the challenge $ $ stage, instead of choosing W2∗ ← LM ∗ , C chooses W2∗ ← XM ∗ \LM ∗ and computes ∗ ∗ ∗ ∗ V as V = ProjHash(hp, W1 , w1 ) ⊕ IB-Hash(hkM ∗ , W2∗ ).

A database DIVS records all the signing queries. Output: Finally, the adversary outputs (w∗ , pk ∗ , M ∗ , t∗ , Rt∗ , σ ∗ ). The adversary wins if pk ∗ ∈ Rt∗ , (w∗ , pk ∗ , M ∗ , t∗ , Rt∗ ) has not been queried to Sign oracle, and (Y, t∗ , pk ∗ , pko , M ∗ , σ ∗ ) can pass the verification. Definition 7. A proxy signature scheme is (t, qD , qR , qS , )-strongly existentially unforgeable under an adaptive chosen message attack if no t-time adversary AIV making at most qD delegation queries, qR revocation queries and qS signing queries has advantage at least in the above game.

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