Deniable editing encryption method for sensitive keywords

The invention discloses a deniable editing encryption method for sensitive keywords. The deniable editing encryption method mainly solves the problem that an existing editing encryption method cannotcontinue to protect document content security after decrypting the sensitive keywords. According to the scheme, the method comprises the steps that encryption parameters are initialized to generate amultiplication group; in a sensitive keyword editing stage, true keywords and pseudo keywords are mapped into a true plaintext and a pseudo plaintext respectively; after the method enters an encryption stage, a true key and a pseudo key which are obtained according to the true plaintext and the pseudo plaintext are stored securely, and true sensitive keywords are encrypted and stored as ciphertext; and a key holder can select a corresponding key for decryption according to his/her own intention, it is guaranteed that the key holder is forced to decrypt the keywords under the non-voluntary condition, and it can still be