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At CRYPTO 2017, Rosca et al. introduce a new variant of the Learning With Errors (LWE) problem, called the Middle-Product LWE (MP-LWE). The hardness of this new assumption is based on the hardness of ...
Homomorphic Encryption (HE) is an emerging technnology that enables computing on data while the data is encrypted. A major challenge with homomorphic encryption is that it takes extensive expert knowl...
Substantial work on trapdoor functions (TDFs) has led to many powerful notions and applications. However, despite tremendous work and progress, all known constructions have prohibitively large public ...
Proof-of-stake (PoS) blockchain protocols are emerging as one of the most promising alternative to the energy-consuming proof-of-work protocols. However, one particularly critical threat in the PoS se...
Hardware reverse engineering is a powerful and universal tool for both security engineers and adversaries. From a defensive perspective, it allows for detection of intellectual property infringements ...
Re-randomizable RCCA-secure public key encryption (Rand-RCCA PKE) schemes reconcile the property of re-randomizability of the ciphertexts with the need of security against chosen-ciphertexts attacks.
Privacy protection has been extensively studied in the current blockchain research field. As representations, Monero and Zerocash have realized completely anonymous and amount-hiding transactions. How...
The Naor-Yung paradigm is a well-known technique that constructs IND-CCA2-secure encryption schemes by means of non-interactive zero-knowledge proofs satisfying a notion of simulation-soundness. Until...
Invariant subspaces (Crypto'11) and subspace trails (FSE'17) are two related recent cryptanalytic approaches that led to new results on, e. g. PRINTCipher and AES. We extend the invariant subspace app...
This paper deals with (1) asymptotics of ``strongly-multiplicative'' arithmetic secret sharing over an arbitrary fixed ring Rℓ:=Z/pℓZ (p>0 prime, ℓ>0 an integer) and supporting an un...
We design an efficient method for sampling a large batch of dd independent coins with a given bias p∈[0,1]p∈[0,1]. The folklore secure computation method for doing so requires O(λ+logd)O(λ+log⁡d...
Consider the representative task of designing a distributed coin-tossing protocol for nn processors such that the probability of heads is X0∈[0,1]X0∈[0,1], and an adversary can reset one processor to ...
We provide new zero-knowledge argument of knowledge systems that work directly for a wide class of language, namely, ones involving the satisfiability of matrix-vector relations and integer relations ...
The tower field implementation of the F28F28 inverter is not only the key technique for compact implementations of the S-boxes of several internationally standardized block ciphers such as AES, Camell...
Homomorphic encryption (HE) is often viewed as impractical, both in communication and computation. Here we provide an additively homomorphic encryption scheme based on (ring) LWE with nearly optimal r...

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