tailieunhanh - Random Oracles are Practical: A Paradigm for Designing Efficient Protocols

There are many contents in this document: abstract, random oracle paradigm, notations, encryption, polynomial security, chosen ciphertext security, non-malleability, results, signatures, instantiation tips, wrap-up. | Random Oracles are Practical A Paradigm for Designing Efficient Protocols Mihir Bellare Phillip Rogaway ACM Computer Comm. Security 1993 presented by Eun-kyung Kim Agenda Definitions Random Oracle Model Notations Encryption Polynomial Security Chosen Cipher-text Security Non-Malleability Signatures Instantiation Abstract Random Oracle Model ROM an ideal mathematical model for a hash function The ROM that they claim more accurately models the real world while simultaneously making proofs easier Motivation Large gap between the theoreticians and practitioners works and views theoretical work gains security at cost of efficiency theorists build PRFs from one-way functions while in practice oneway functions are built from PRFs PRF Pseudo Random .

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