By Ernest Foo, Douglas Stebila

This publication constitutes the refereed convention complaints of the 20 th Australasian convention on details defense and privateness, ACISP 2015, held in Brisbane, QLD, Australia, in June/July 2015.

The 28 revised complete papers awarded during this quantity have been rigorously revised and chosen from 112 submissions. The papers are prepared in topical sections on symmetric cryptanalysis; public key cryptography; identity-based encryption; electronic signatures; defense protocols; privateness protocols; symmetric structures; homomorphic encryption and obfuscation.

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Extra resources for Information Security and Privacy: 20th Australasian Conference, ACISP 2015, Brisbane, QLD, Australia, June 29 -- July 1, 2015, Proceedings

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3. The attack complexities can be denoted as follows: T = 2n (2−Dr + 2Dg −Db + 2Dg −Dm ), M = min{2Dr +Dg , 2Db }. (1) We can derive the optimal attack parameters by enumerating all possible values of (b, r, c, g). Complexity Analysis. Fig. 3 gives the optimal chunk separation for the pseudo preimage attack on the compression function, and it requires 2480 time and 2128 memory. In order to balance the overall complexities, we generate 216 pseudo preimages in the first phase. In the second phase of the attack, we compute 2496 ht+1 s, and find a match with the pseudo preimages generated in the first phase with a high probability.

Near Collision ♥ SFS. Collision ♥ 512 2 2512 2512 2256 We do not consider the attacks starting from a middle round. Limited-birthday distinguisher on the hash function. Semi-free-start (near) collision on the compression function. Free-start near collision (896 colliding bits out of 1024 bits) on the compression function with truncation. Multiple limited-birthday distinguisher on the permutation. Structure. The remainder of this paper is organized as follows: Section 2 provides a brief description of the Whirlwind hash function, and the techniques utilized in this paper.

Near Collision ♥ SFS. Collision ♥ 512 2 2512 2512 2256 We do not consider the attacks starting from a middle round. Limited-birthday distinguisher on the hash function. Semi-free-start (near) collision on the compression function. Free-start near collision (896 colliding bits out of 1024 bits) on the compression function with truncation. Multiple limited-birthday distinguisher on the permutation. Structure. The remainder of this paper is organized as follows: Section 2 provides a brief description of the Whirlwind hash function, and the techniques utilized in this paper.

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