ARMADILLO: A Multi-purpose Cryptographic Primitive Dedicated to Hardware

This paper describes and analyzes the security of a general-purpose cryptographic function design, with application in RFID tags and sensor networks. Based on these analyzes, we suggest minimum parameter values for the main components of this cryptographic function, called ARMADILLO. With fully serial architecture we obtain that 2 923 GE could perform one compression function computation within 176 clock cycles, consuming 44 μW at 1 MHz clock frequency. This could either authenticate a peer or hash 48 bits, or encrypt 128 bits on RFID tags. A better tradeoff would use 4 030 GE, 77 μW of power and 44 cycles for the same, to hash (resp. encrypt) at a rate of 1.1 Mbps (resp. 2.9 Mbps). As other tradeoffs are proposed, we show that ARMADILLO offers competitive performances for hashing relative to a fair Figure Of Merit (FOM)

Planck early results V : The Low Frequency Instrument data processing

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Response of a pipeline to nearby deep trenching in boulder clay

SIGLELD:9057.24(TRRL-LR--109) / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Children's cultural background knowledge and story telling performance

Contains fulltext : 62989.pdf (publisher's version ) (Closed access)The cultural context in which a child is raised influences her cognitive system and language behavior. In this paper, we explored the influence of cultural back ground knowledge on story telling performance of two groups of children living in the Netherlands: (1) bilingual ethnic minority children from immigrant families of Islamic background(2) monolingual Dutch children. Using a within-subject design, all children retold, continued, and finished three story beginnings: One story dealt with a topic related to the ethnic minority children's cultural background(Ramadan), one story dealt with a topic related to the Dutch children's cultural background(Carnival), and one story dealt with a topic both groups of children were familiar with (playing at the schoolyard). All children spoke in Dutch, which implies that the ethnic minority children performed all tasks in a language other than their family language, whereas the Dutch children performed the same tasks in their native language. It appeared that both quantitative and qualitative characteristics of the stories were influenced by the children's cultural background knowledge. Measurements of story length showed that ethnic minority children's Ramadan stories were longer than their Carnival stories, whereas Dutch children's Carnival stories were longer than their Ramadan stories. Likewise, the ethnic minority children's Ramadan stories containedmore connective ties(as indexed by the number of conjunctions used) than their Carnival stories, whereas the reverse pattern was observed in Dutch children. These findings indicate that cultural familiarity with a topic influences story telling performance in terms of story length and coherence.21 p

Multipurpose Cryptographic Primitive

Abstract. This paper describes a new design of the multipurpose cryptographic primitive ARMADILLO3 and analyses its security. The AR-MADILLO3 family is oriented on small hardware such as smart cards and RFID chips. The original design ARMADILLO and its variants were analyzed by Sepehrdad et al. at CARDIS’11, the recommended variant ARMADILLO2 was analyzed by Plasencia et al. at FSE’12 and by Abdelraheem et al. at ASIACRYPT’11. The ARMADILLO3 design takes the original approach of combining a substitution and a permutation layer. The new family ARMADILLO3 introduces a reduced-size substitution layer with 3 × 3and4 × 4 S-boxes, which covers the substitution layer from 25 % to 100 % of state bits, depending on the security requirements. We propose an instance ARMADILLO3-A1/4 with a pair of permutations and S-boxes applied on 25 % of state bits at each stage.