| 摘要 |
PROBLEM TO BE SOLVED: To disclose a method for encrypting and decrypting a file using a telephone number for enabling a recipient to decrypt an encrypted file only by carrying only his or her own personal terminal without knowing a decryption key when receiving the encrypted file.SOLUTION: When a file is encrypted by a sender computer 10, the telephone number of a personal terminal 30 owned by a recipient is used as an encryption key, and the encrypted file including the encryption key is transmitted to a recipient computer 20. When the encrypted file is executed by the recipient computer 20, a decryption module included in the encrypted file is executed, and a push message is transferred to the personal terminal 30 by using the telephone number included in the encryption key included in the encrypted file, and personal terminal authentication is performed by using an authentication key sent from the personal terminal 30, and when the personal terminal authentication succeeds, the encrypted file is decrypted by the decryption module. |
