Percorrer por autor "Nakai, Eduardo Yuzo"
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- Evaluation and implementation of the Ed25519 digital signature algorithm in rustPublication . Nakai, Eduardo Yuzo; Exposto, José; Pedrosa, Tiago; Campiolo, RodrigoCryptography can be classified as secret-key and public-key cryptography. Both have distinct features and differs in performance, complexity, flexibility and security. Secret-key cryptography, considering its simplicity and performance, is commonly used for securing communications. The invention of public-key cryptography made it possible to develop more flexible cryptographic schemes and algorithms, such as key exchanges and digital signatures, hence extending the possibilities and the field of cryptography. Cryptographic implementations are primordial for securing the Internet, and as a consequence, correctness, security and efficiency are more emphasized. In this sense, this work addresses the evaluation and the implementation of Ed25519, an instance of the Edwards-curve Digital Signature Algorithm for digital messages authentication. The implementation lies on Rust: a safe, modern, high-level and strongly-typed programming language. This work has two contributions: (i) an Ed25519 implementation in Rust that considers readability, modularity and ease of use, and (ii) an evaluation of the Ed25519 implementation from a security/performance perspective. The implementation was comprised by three modules: field arithmetic, curve arithmetic and the interface. The security perspective presented essential qualities of cryptographic implementations, such as functional correctness, memory safety, constant-time operations and usability. The performance evaluation showed low execution times and proved to be as fast as implementations written in C; Rust’s RAM consumption showed similar results in comparison to implementations written in C.