Method of encryption, method for decrypting, devices and programs

    公开(公告)号:US10666421B2

    公开(公告)日:2020-05-26

    申请号:US15579820

    申请日:2016-06-06

    Applicant: INGENICO GROUP

    Inventor: Eric Brier

    Abstract: A method is provided for encrypting a code of a computer program using an encryption key selected from among at least two encryption keys. Such a method includes: obtaining a descriptive grammar of the language of the code to be encrypted; encoding the code by using the descriptive grammar delivering a character string within which at least one start instruction of the code is encoded as a representation in the character string; encryption of the character string by using the encryption key belonging to the set of encryption keys, delivering an encrypted string. A method of decryption includes the inverse steps and also makes use of the descriptive grammar of the code.

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