Computer Security - ESORICS 2014: 19th European Symposium on by Miroslaw Kutylowski, Jaideep Vaidya

By Miroslaw Kutylowski, Jaideep Vaidya

The two-volume set, LNCS 8712 and LNCS 8713 constitutes the refereed lawsuits of the nineteenth ecu Symposium on study in machine protection, ESORICS 2014, held in Wroclaw, Poland, in September 2014 The fifty eight revised complete papers provided have been rigorously reviewed and chosen from 234 submissions. The papers handle concerns similar to cryptography, formal tools and idea of safeguard, safeguard prone, intrusion/anomaly detection and malware mitigation, defense in undefined, structures safeguard, community protection, database and garage protection, software program and alertness protection, human and societal features of safety and privacy.

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Additional info for Computer Security - ESORICS 2014: 19th European Symposium on Research in Computer Security, Wroclaw, Poland, September 7-11, 2014. Proceedings, Part II

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The number of steps depends on whether H, P , or T are empty or not, and whether D = 1 or not. NORX skips processing phases of empty message parts. For example, in the simplest case when |H| = |T | = 0, |P | > 0, and D = 1, message processing is done in one step, since only the payload P needs to be encrypted and authenticated. Below, we first describe the padding and domain separation rules, then each of the aforementioned phases. Padding. NORX uses the multi-rate padding [2], a padding rule defined by padr : X −→ X 10q 1 with bitstrings X and 10q 1, and q = (−|X| − 2) mod r.

If |H| = 0, this step is skipped, otherwise let ··· HmH −1 denote the padded header data, with rpadr (H) = H0 bit sized header blocks Hl = hl,0 · · · hl,9 and 0 ≤ l ≤ mH − 1. Then Hl is processed by: sj ←− sj ⊕ hl,j , s15 ←− s15 ⊕ v for 0≤j≤9 S ←− FR (S) 2. Branching. This step is only performed if D = 1 and |P | > 0. In that case, NORX encrypts payload data on parallel lanes Li , with 0 ≤ i ≤ D − 1 if D > 1, or 0 ≤ i ≤ |P | / r − 1 if D = 0. For each lane Li , a copy Si = si,0 · · · si,15 of the state S is created.

Pt Abstract. This paper introduces NORX, a novel authenticated encryption scheme supporting arbitrary parallelism degree and based on ARX primitives, yet not using modular additions. NORX has a unique parallel architecture based on the monkeyDuplex construction, with an original domain separation scheme for a simple processing of header, payload and trailer data. Furthermore, NORX specifies a dedicated datagram to facilitate interoperability and avoid users the trouble of defining custom encoding and signalling.

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