The RSA cryptosystem is a public-key encryption method used for secure data exchange and digital signatures. This asymmetric cryptographic algorithm relies on the computational difficulty of factoring large prime numbers to secure communications. It employs a pair of keys, one public for encryption and verification, and one private for decryption and signing. While not typically used for on-chain transaction signing in most modern blockchains due to computational overhead, RSA remains a foundational element for securing internet communications and digital certificates, which underpin many interactions with digital asset platforms.
Context
While newer cryptographic schemes, like elliptic curve cryptography, have gained prominence in blockchain for their efficiency, the RSA cryptosystem continues to serve as a benchmark for public-key security. Discussions in news often reference RSA in broader cybersecurity contexts, including its use in securing web traffic to cryptocurrency exchanges or for digital identity verification. Its long-standing security properties are continuously evaluated against advancements in computational power.
This research introduces an RSA-based aggregate signature scheme, fundamentally reducing blockchain storage and network traffic by consolidating multiple signatures into one.
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