Digital data file encryption apparatus and method

Details Digital data file encryption apparatus and method Digital data file encryption apparatus and method

2008-01-29

2008-01-29

Bayat, Bradley (Department: 3621)

Data processing: financial, business practice, management, or co

Business processing using cryptography

Usage protection of distributed data files

C705S001100, C705S054000, C705S056000, C380S202000, C380S203000, C380S204000, C380S227000, C380S228000, C380S229000, C380S230000

Reexamination Certificate

active

09499633

ABSTRACT:
A digital data file encryption apparatus and method, where a digital data server identifies the user and supplies an encrypted digital data file to the user in accordance with the identified result. A personal computer decrypts the encrypted digital data file supplied from the digital data server and reproduces the decrypted digital data file or re-encrypts it using an encryption key. The encryption key is generated on the basis of an identification number of a data storage medium or digital data playing device. A digital data playing device stores the re-encrypted digital data file downloaded from the personal computer in the data storage medium and decrypts the stored digital data file using the encryption key to reproduce it. A first internal key is added to the identification number to convert the identification number into the encryption key, which is then encrypted according to an encryption algorithm based on a second internal key. The digital data file is the encrypted using the encrypted encryption key.

REFERENCES:
patent: 5784464 (1998-07-01), Akiyama et al.
patent: 5933498 (1999-08-01), Schneck et al.
patent: 6868404 (2005-03-01), Ono et al.
patent: 7058819 (2006-06-01), Okaue
patent: 8-69419 (1996-03-01), None
patent: 10-191036 (1998-07-01), None
patent: 10-260902 (1998-09-01), None
patent: 874300 (1998-10-01), None
patent: WO 01/93002 (2001-12-01), None
MEnezes, Alfred J, et al. “Handbook of Applied Cryptography” (c) 1997 CRC Press. pp. 568-570.
T. Yamamoto et al., Technical Report of IEICE, ISEC 93-29, vol. 93, No. 208, (1993), pp. 65-75.

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