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Scientists discover a new way of sharing genetic information in a common ocean microbe（图）
海洋微生物 共享 遗传信息 原绿球菌 光合生物 基因转移
2023/6/21
From the tropics to the poles, from the sea surface to hundreds of feet below, the world’s oceans are teeming with one of the tiniest of organisms: a type of bacteria called Prochlorococcus, which des...
首届国际组织胜任力大赛(IO SDG KNOWLEDGE SHARING)参赛方案与报名通道
国际组织 胜任力 参赛方案 报名通道 IO SDG KNOWLEDGE SHARING
2023/3/19
为深化国际组织和全球治理相关领域的研究，推动国际组织人才培养，提高学生对国际组织问题的兴趣和关注度，增加学生对国际组织有关知识的了解，为关注全球治理、未来有志参与国际组织工作的学生提供学习交流的平台，培养分析和解决问题的能力，促进其理论素养和实践能力的提升，北京外国语大学定于2022年12月至2023年4月发起并举办首届国际组织胜任力大赛。
Sharing the LUOV: Threshold Post-Quantum Signatures
cryptographic protocols linear secret shared schemes
2019/9/19
We examine all of the signature submissions to Round-2 of the NIST PQC ``competition'' in the context of whether one can transform them into threshold signature schemes in a relatively straight forwar...
Asymptotically-Good Arithmetic Secret Sharing over Z/(p^\ell Z) with Strong Multiplication and Its Applications to Efficient MPC
multiparty computation amortization information-theoretical security
2019/7/18
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...
Improved Building Blocks for Secure Multi-Party Computation based on Secret Sharing with Honest Majority
cryptographic protocols secret sharing
2019/6/19
Secure multi-party computation permits evaluation of any desired functionality on private data without disclosing the data to the participants and is gaining its popularity due to increasing collectio...
On the Local Leakage Resilience of Linear Secret Sharing Schemes
Secret Sharing leakage resilience information theory
2019/6/5
We consider the following basic question: to what extent are standard secret sharing schemes and protocols for secure multiparty computation that build on them resilient to leakage? We focus on a simp...
Information ratio of an access structure is an important measure for efficiency of the best secret sharing scheme realizing it. The most common notion of secret sharing security is that of total (perf...
Continuously Non-Malleable Secret Sharing for General Access Structures
Secret sharing Non-malleability Leakage resilience
2019/6/3
We study leakage-resilient continuously non-malleable secret sharing, as recently intro- duced by Faonio and Venturi (CRYPTO 2019). In this setting, an attacker can continuously tamper and leak from a...
Information ratio of an access structure is an important measure for efficiency of the best secret sharing scheme realizing it. The most common notion of secret sharing security is that of total (perf...
2-threshold Ideal Secret Sharing Schemes Can Be Uniquely Modeled by Latin Squares
secret sharing ideal secret sharing 2-threshold secret sharing
2019/5/31
In a secret sharing scheme, a secret value is encrypted into several shares, which are distributed among corresponding participants. It requires that only predefined subsets of participants can recons...
On Abelian Secret Sharing: duality and separation
Access structure Duality Characteristic-dependent information ratio
2019/5/29
Unlike linear secret sharing, very little is known about abelian secret sharing. In this paper, we present two results on abelian secret sharing. First, we show that the information ratio of access st...
Group-homomorphic Secret Sharing Schemes Are Group-characterizable with Normal Subgroups
homomorphic secret sharing schemes group-characterizable distribution quasi-uniform distribution
2019/5/29
A group-characterizable random variable [Chan and Yeung 2002] is induced by a joint distribution on the (left) cosets of some subgroups of a main group. A homomorphic secret sharing scheme [Benaloh 19...
Secret-Sharing from Robust Conditional Disclosure of Secrets
cryptographic protocols secret sharing
2019/5/21
A secret-sharing scheme is a method by which a dealer, holding a secret string, distributes shares to parties such that only authorized subsets of parties can reconstruct the secret. The collection of...
Sharing of Encrypted files in Blockchain Made Simpler
blockchain proxy re-encryption self-encryption
2019/4/25
Recently, blockchain technology has attracted much attention of the research community in several domains requiring transparency of data accountability, due to the removal of intermediate trust assump...
Nearly all secret sharing schemes studied so far are linear or multi-linear schemes. Although these schemes allow to implement any monotone access structure, the share complexity may be suboptimal -- ...