Salma Ezziri
ABSTRACT
A proxy signature scheme permits a specific selected person, named a proxy signer, to sign messages on behalf of the original signer. It is a useful mechanism in several fields. For example, a director of a company can delegate his signing power to a proxy agent when he goes to travel.
In 2002, Shum and Wei proposed a proxy signature scheme [19] which it was elaborated to protect the proxy signer's identity using an alias. However, the insecurity of the protocol was remarked by Sun and Hsieh [24].
To avoid the mentioned weakness, in this work we suggest an amelioration of Shum and Wei proxy signature using RSA encryption [16], and we present a numerical simulation to evaluate its efficiency. Also, we study its security and complexity.
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Index Terms
- Amelioration of a proxy signature using RSA encryption
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