Printing equipment and consumable encryption and decryption algorithm anti-counterfeiting method and system

Abstract

The invention discloses an anti-counterfeiting method and system for encryption and decryption algorithms of printing equipment and consumables. The method comprises the steps that an encryption mechanism reads information to be verified and inputs an encryption selection program; the encryption selection program receives the to-be-verified information and generates encryption selection information i so as to select an encryption algorithm from an encryption algorithm group; encrypting the to-be-verified information by using the selected encryption algorithm to form a ciphertext, and sending the ciphertext to a decryption mechanism; after receiving the ciphertext, the decryption mechanism traverses decryption algorithms in a decryption algorithm group and records the number of the decryption algorithms which can be successfully decrypted, if the number of the decryption algorithms is not equal to 2, verification fails, and if the number of the decryption algorithms is equal to 2, the next step is executed; and reading decryption selection information j and k corresponding to a decryption algorithm capable of successfully decrypting the ciphertext, if j and k meet a preset judgment condition, determining that verification succeeds, otherwise, determining that verification fails. According to the method, the identifiable information is verified, selection and matching records of encryption and decryption algorithms can be verified, and the cracking difficulty is high.

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