Abstract

Digitalization has attracted the world to collect increasing data.

Background: Proxy signature is a digital alternative for signing documents in the absence of the original signer.

Methods: In this paper, we have used the mathematical methods and concepts of Chaotic maps (CMs) and elliptic curve cryptography.

Results: We have proposed a new proxy signature scheme (PSS). Security of our PSS relies on "elliptic curve discrete logarithm (ECDL) and integer factorization (FAC) problems". It requires only low-complexity computation, which increases efficiency.

Conclusion: It is the first PSS in such a security setting and can also be assumed to be secure in the post-quantum cryptographic world. It can be highly used digitally during thePandemic conditions like COVID-19.

Keywords: Proxy signature, ID-based public key cryptography, chaotic maps, elliptic curve cryptography, digital signature, data, elliptic curve discrete logarithm.