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Information Conservational Security with “Black Hole” Keypad Compression and Scalable One-Time Pad — A Quantum Intelligence Approach to Pre- and Post-Quantum Cryptography
Pre- and Post-Quantum Cryptography Scalable One-Time Pad (S-OTP) Information Conservational Security (ICS)
2019/8/14
Whereas it is widely deemed impossible to overcome the optimality of the one-time pad (OTP) cipher in pre- and post-quantum cryptography, this work shows that the optimality of information theoretic s...
Efficient Information-Theoretic Secure Multiparty Computation over Z/pkZ via Galois Rings
MPC Galois Rings
2019/7/30
At CRYPTO 2018, Cramer et al. introduced a secret-sharing based protocol called SPDZ2kZ2k that allows for secure multiparty computation (MPC) in the dishonest majority setting over the ring of integer...
A Candidate Access Structure for Super-polynomial Lower Bound on Information Ratio
secret sharing general access structures information ratio
2019/6/3
The contribution vector (convec) of a secret sharing scheme is the vector of all share sizes divided by the secret size. A measure on the convec (e.g., its maximum or average) is considered as a crite...
Best Information is Most Successful
Side-Channel Analysis Information Theory Guessing Entropy
2019/5/21
Using information-theoretic tools, this paper establishes a mathematical link between the probability of success of a side-channel attack and the minimum number of queries to reach a given success rat...
Backward Private DSSE: Alternative Formulations of Information Leakage and Efficient Constructions
Dynamic Searchable Symmetric Encryption Backward Privacy Forward Privacy
2019/5/9
Dynamic Searchable Symmetric Encryption (DSSEDSSE), apart from providing support for search operation, allows a client to perform update operations on outsourced database efficiently. Two security pro...
On Quantum Advantage in Information Theoretic Single-Server PIR
quantum complexity private information retrieval specious security
2019/3/4
In (single-server) Private Information Retrieval (PIR), a server holds a large database DBDB of size nn, and a client holds an index i∈[n]i∈[n] and wishes to retrieve DB[i]DB[i] without revealing ii t...
An Information Obfuscation Calculus for Encrypted Computing
Applications foundations information theory
2019/1/29
Relative cryptographic semantic security for encrypted words of user data at runtime holds in the emerging field of encrypted computing, in conjunction with an appropriate instruction set and compiler...
Efficient Information Theoretic Multi-Party Computation from Oblivious Linear Evaluation
information theoretic multi-party computation oblivious linear evaluation
2019/1/2
Oblivious linear evaluation (OLE) is a two party protocol that allows a receiver to compute an evaluation of a sender's private, degree 11 polynomial, without letting the sender learn the evaluation p...
Low Randomness Masking and Shuffling: An Evaluation Using Mutual Information
masking shuffling RNG
2018/11/19
Side-channel countermeasure designers often face severe performance overheads when trying to protect a device. Widely applied countermeasures such as masking and shuffling entail generating a large am...
Information-Theoretic Broadcast with Dishonest Majority for Long Messages
Byzantine broadcast information-theoretic security dishonest majority
2018/11/16
Byzantine broadcast is a fundamental primitive for secure computation. In a setting with nn parties in the presence of an adversary controlling at most tt parties, while a lot of progress in optimizin...
Scalable One-Time Pad --- From Information Theoretic Security to Information Conservational Security
Information Conservational Security Data Compression Quantum-Fuzzy Collective Precision
2018/11/16
Whereas it is widely deemed an impossible task to scale One-Time Pad (OTP) without sacrificing information theoretic security or network traffic, this paper presents a paradigm of Scalable OneTime Pad...
Two Round Information-Theoretic MPC with Malicious Security
MPC Round-optimal Information-theoretic
2018/11/12
We provide the first constructions of two round information-theoretic (IT) secure multiparty computation (MPC) protocols in the plain model that tolerate any t malicious corruptions. Our prot...
Private Stateful Information Retrieval
cryptographic protocols Private information retrieval
2018/11/12
Private information retrieval (PIR) is a fundamental tool for preserving query privacy when accessing outsourced data. All previous PIR constructions have significant costs preventing widespread use. ...
We continue the study of protocols for secure multiparty computation (MPC) that require only two rounds of interaction. The recent works of Garg and Srinivasan (Eurocrypt 2018) and Benhamouda and Lin ...
We reconsider the security guarantee that can be achieved by general protocols for secure multiparty computation in the most basic of settings: information-theoretic security against a semi-honest adv...