Recording device and recording and reproducing device

• US 7,562,201 B2
• Filed: 01/25/2007
• Issued: 07/14/2009
• Est. Priority Date: 03/17/2004
• Status: Active Grant

• Current Assignee: Maxell, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Yamamoto, Takayuki
• Primary Examiner(s): Ellis; Kevin L
• Assistant Examiner(s): Faal; Baboucarr
• Application Number:
  US11/657,560
• Publication Number:
  US 20070186038A1
• Time in Patent Office: 901 Days
• Field of Search: 711/112, 711/163, 711/164, 713/178
• US Class Current: 711/163
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 2221/2137 Time limited access, e.g. to a computer or data
• CPC Class Codes: G06F 3/0622 in relation to access
• CPC Class Codes: G06F 3/0637 Permissions
• CPC Class Codes: G06F 3/0674 Disk device
• CPC Class Codes: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/0084 wherein the usage restriction can be expressed as a specific time or date

Abstract

To make content irreproducible in a recording device after a set expiration time, the recording device has a read/write unit for reading and writing data on a recording unit, the read/write unit having electric power supplied from an external power source, a clock containing a built-in battery, an input/output interface for inputting data from outside and outputting data to outside, and a controller for controlling the read/write unit and the input/output interface. The recording medium includes an ordinary data area for writing ordinary data and an expiration time data area for writing an expiration time of ordinary data. The controller prevents ordinary data written in the ordinary data area from being output to outside when the expiration time written in the expiration time area has passed a time limit calculated by the clock.

Claims

1. A recording device for recording data on a recording medium, comprising:

a read/write module which reads and writes data on a recording medium, said read/write module having electric power being supplied by an external power source;

a battery-built-in clock which has a built-in battery and a clock function;

an input/output interface for inputting data from outside and outputting data to outside; and

a controller for controlling said read/write module and said input/output interface, wherein;

said recording medium includes an ordinary data area for writing ordinary data and an expiration time data area for writing an expiration time of said ordinary data, and

said controller performs control to alter ordinary data read from said recording medium into invalid data and output said invalid data, when said ordinary data is read and said expiration time written in said expiration time data area has passed based on a time calculated by the clock function of said battery-built-in clock, and

said controller performs control to delete said ordinary data on said recording medium at arbitrary timing later than said expiration time.

2. A recording device according to claim 1 wherein:

it is possible to set an expiration time mode, and

when the expiration time mode has been set, an expiration time is written, or when an expiration time has not been set, no expiration time is written.

3. A recording device for recording data on a recording medium, comprising:

a read/write module which reads and writes data on a recording medium, wherein said recording medium includes an ordinary data area for writing ordinary data and an expiration time data area for writing an expiration time of said ordinary data, said read/write module having electric power being supplied by an external power source;

a battery-built-in clock which has a built-in battery and a clock function;

an input/output interface for inputting data from outside and outputting data to outside; and

a controller for controlling said read/write module and said input/output interface, wherein said controller performs control to;

(1) alter valid ordinary data read from said recording medium into invalid data and output said invalid data, when said ordinary data is read at a time when the expiration time written in said expiration time data area has passed based on a time calculated by the clock function of said battery-built-in clock, and

(2) delete the valid ordinary data from said recording medium at later timing than an expiration time.

4. A recording device according to claim 3 wherein:

it is possible to set an expiration time mode, and

when the expiration time mode has been set, an expiration time is written, or when an expiration time has not been set, no expiration time is written.