Method and system for authentication and electronic signature
First Claim
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1. A method for authentication and electronic signature, comprising:
- generating a casual initial signal, comprising acquiring a random signal;
generating an authentication and electronic signature signal by using a first private key, the casual initial signal, and a first chaotic signal generator and generating a first chaotic signal by activating the first chaotic signal generator for a development time related to the random signal;
generating a comparison signal by using the casual initial signal, a second private key equal to the first private, and a second chaotic signal generator identical to the first chaotic generator and generating a second chaotic signal; and
comparing said authentication and electronic signature signal with said comparison signal.
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Abstract
The method for authentication and electronic signature is of the private-key, challenge and response type between a user requesting an authorization, via, for example, a smart card and a controller—check terminal—supplying the authorization. To increase security of the authorization or authentication operations, the smart card comprises a chaotic generator generating user'"'"'s acknowledgement code, which is compared with a comparison code generated by the check terminal using a chaotic generator which is the same.
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Citations
4 Claims
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1. A method for authentication and electronic signature, comprising:
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generating a casual initial signal, comprising acquiring a random signal;
generating an authentication and electronic signature signal by using a first private key, the casual initial signal, and a first chaotic signal generator and generating a first chaotic signal by activating the first chaotic signal generator for a development time related to the random signal;
generating a comparison signal by using the casual initial signal, a second private key equal to the first private, and a second chaotic signal generator identical to the first chaotic generator and generating a second chaotic signal; and
comparing said authentication and electronic signature signal with said comparison signal. - View Dependent Claims (2, 3)
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4. A method for authentication and electronic signature, comprising:
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generating a casual initial signal, comprising acquiring a respective random signal for a plurality of message blocks, each message block comprising a first message block, a successive message block, and a final message block;
generating an authentication and electronic signature signal by using a first private key, the casual initial signal, and a first chaotic signal generator and generating a first chaotic signal, which further comprises;
a) acquiring the first message block;
b) generating a chaotic output signal from said first message block by activating the first chaotic generator for a development time correlated to the respective random signal;
c) combining said chaotic output signal with the successive message block to obtain a combined block;
d) generating a new chaotic output signal from said combined block by activating the first chaotic generator for a development time correlated to the respective random signal;
e) repeating said steps c) and d) as far as the last message block; and
f) supplying said chaotic output signal as the signature of said message;
generating a comparison signal by using the casual initial signal, a second private key equal to the first private key, and a second chaotic signal generator identical to the first chaotic generator and generating a second chaotic signal; and
comparing said authentication and electronic signature signal with said comparison signal.
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Specification