| 摘要 |
A method of decrypting a cipher polynomial (e) using a private key (f) comprises: (a) Computing a trial polynominal (a), where a = f* e (mod q) and (q) is an integer; (b) Determining, on the basis of the trial polynomial (a) , whether the polynomial (e) has decoded correctly, and if not: (i) determinin g which coefficient or coefficients of the trial polynomial (a) are likely to have caused the failure to decode; (ii) adjusting the said coefficient or coefficients to define a new trial polynomial; and (iii) attempting to decod e the cipher polynomial (e) using the new trial polynomial. The method is particularly applicable to public key cryptosystems and, more particularly, to polynomial-based systems.
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