Efficient Code Based Hybrid and Deterministic Encryptions in the Standard Model
TL;DR: The proposed constructions are the first of its kind under coding-based assumption in the standard model that do not use the \(\kappa \)-repetition paradigm initiated by Rosen and Segev at Theory of Cryptography Conference (TCC), 2009.
Abstract: In this paper, we propose an IND-CCA2 secure Key-Encapsulation (KEM) in the standard model using the Niederreiter Encryption scheme. Also, we propose a PRIV-1CCA secure deterministic variant of the Niederreiter encryption scheme in the standard model. The security of these constructions are reduced to the hardness of the Syndrome Decoding problem and the Goppa Code Distinguishability problem. To the best of our knowledge, the proposed constructions are the first of its kind under coding-based assumption in the standard model that do not use the \(\kappa \)-repetition paradigm initiated by Rosen and Segev at Theory of Cryptography Conference (TCC), 2009.
01 Jan 2010
TL;DR: Cryptosystems I and II: Cryptography between Wonderland and Underland as discussed by the authors, a simple BGN-type Cryptosystem from LWE, or Bonsai Trees, or how to delegate a Lattice Basis.
Abstract: Cryptosystems I.- On Ideal Lattices and Learning with Errors over Rings.- Fully Homomorphic Encryption over the Integers.- Converting Pairing-Based Cryptosystems from Composite-Order Groups to Prime-Order Groups.- Fully Secure Functional Encryption: Attribute-Based Encryption and (Hierarchical) Inner Product Encryption.- Obfuscation and Side Channel Security.- Secure Obfuscation for Encrypted Signatures.- Public-Key Encryption in the Bounded-Retrieval Model.- Protecting Circuits from Leakage: the Computationally-Bounded and Noisy Cases.- 2-Party Protocols.- Partial Fairness in Secure Two-Party Computation.- Secure Message Transmission with Small Public Discussion.- On the Impossibility of Three-Move Blind Signature Schemes.- Efficient Device-Independent Quantum Key Distribution.- Cryptanalysis.- New Generic Algorithms for Hard Knapsacks.- Lattice Enumeration Using Extreme Pruning.- Algebraic Cryptanalysis of McEliece Variants with Compact Keys.- Key Recovery Attacks of Practical Complexity on AES-256 Variants with up to 10 Rounds.- IACR Distinguished Lecture.- Cryptography between Wonderland and Underland.- Automated Tools and Formal Methods.- Automatic Search for Related-Key Differential Characteristics in Byte-Oriented Block Ciphers: Application to AES, Camellia, Khazad and Others.- Plaintext-Dependent Decryption: A Formal Security Treatment of SSH-CTR.- Computational Soundness, Co-induction, and Encryption Cycles.- Models and Proofs.- Encryption Schemes Secure against Chosen-Ciphertext Selective Opening Attacks.- Cryptographic Agility and Its Relation to Circular Encryption.- Bounded Key-Dependent Message Security.- Multiparty Protocols.- Perfectly Secure Multiparty Computation and the Computational Overhead of Cryptography.- Adaptively Secure Broadcast.- Universally Composable Quantum Multi-party Computation.- Cryptosystems II.- A Simple BGN-Type Cryptosystem from LWE.- Bonsai Trees, or How to Delegate a Lattice Basis.- Efficient Lattice (H)IBE in the Standard Model.- Hash and MAC.- Multi-property-preserving Domain Extension Using Polynomial-Based Modes of Operation.- Stam's Collision Resistance Conjecture.- Universal One-Way Hash Functions via Inaccessible Entropy.- Foundational Primitives.- Constant-Round Non-malleable Commitments from Sub-exponential One-Way Functions.- Constructing Verifiable Random Functions with Large Input Spaces.- Adaptive Trapdoor Functions and Chosen-Ciphertext Security.
08 Oct 2008
TL;DR: A Privacy Protection Scheme for a Scalable Control Method in Context-Dependent Services is proposed in this paper, where the GPS Identification Scheme using Frobenius Expansions and Searching for Messages Conforming to Arbitrary Sets of Conditions in SHA-256 are discussed.
Abstract: A Privacy Protection Scheme for a Scalable Control Method in Context-Dependent Services.- The GPS Identification Scheme Using Frobenius Expansions.- Searching for Messages Conforming to Arbitrary Sets of Conditions in SHA-256.- Efficient Hash Collision Search Strategies on Special-Purpose Hardware.- Cryptography Based on Quadratic Forms: Complexity Considerations.- Towards a Concrete Security Proof of Courtois, Finiasz and Sendrier Signature Scheme.- Cryptanalysis of MOR and Discrete Logarithms in Inner Automorphism Groups.- Preimages for Reduced-Round Tiger.- Specific S-Box Criteria in Algebraic Attacks on Block Ciphers with Several Known Plaintexts.- Combiner Driven Management Models and Their Applications.- New Attacks on the Stream Cipher TPy6 and Design of New Ciphers the TPy6-A and the TPy6-B.- Cryptanalysis of Achterbahn-128/80 with a New Keystream Limitation.
01 Jan 1999
01 Jan 1978
TL;DR: In this article, the authors provide formal definitions and efficient secure techniques for turning noisy information into keys usable for any cryptographic application, and, in particular, reliably and securely authenticating biometric data.
Abstract: We provide formal definitions and efficient secure techniques for turning noisy information into keys usable for any cryptographic application, and, in particular, reliably and securely authenticating biometric data. Our techniques apply not just to biometric information, but to any keying material that, unlike traditional cryptographic keys, is (1) not reproducible precisely and (2) not distributed uniformly. We propose two primitives: a fuzzy extractor reliably extracts nearly uniform randomness $R$ from its input; the extraction is error-tolerant in the sense that $R$ will be the same even if the input changes, as long as it remains reasonably close to the original. Thus, $R$ can be used as a key in a cryptographic application. A secure sketch produces public information about its input $w$ that does not reveal $w$ and yet allows exact recovery of $w$ given another value that is close to $w$. Thus, it can be used to reliably reproduce error-prone biometric inputs without incurring the security risk inherent in storing them. We define the primitives to be both formally secure and versatile, generalizing much prior work. In addition, we provide nearly optimal constructions of both primitives for various measures of “closeness” of input data, such as Hamming distance, edit distance, and set difference.
••01 Feb 1989
TL;DR: A Universal One-Way Hash Function family is defined, a new primitive which enables the compression of elements in the function domain and it is proved constructively that universal one- way hash functions exist if any 1-1 one-way functions exist.
Abstract: We define a Universal One-Way Hash Function family, a new primitive which enables the compression of elements in the function domain. The main property of this primitive is that given an element x. We prove constructively that universal one-way hash functions exist if any 1-1 one-way functions exist.Among the various applications of the primitive is a One-Way based Secure Digital Signature Scheme, a system which is based on the existence of any 1-1 One-Way Functions and is secure against the most general attack known. Previously, all provably secure signature schemes were based on the stronger mathematical assumption that trapdoor one-way functions exist.
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