Using data stored in a destructive-read memory

Details Using data stored in a destructive-read memory Using data stored in a destructive-read memory

2007-08-21

2007-08-21

Sough, Hyung (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

C705S051000, C705S057000, C713S193000

Reexamination Certificate

active

09948462

ABSTRACT:
A destructive-read memory is one that the process of reading the memory causes the contents of the memory to be destroyed. Such a memory may be used in devices that are intended to acquire data that may have associated usage restrictions, such as an expiration date, usage count limit, or data access fee for the acquired data. Typically, to enforce usage restrictions, and protect against theft, complex and often costly security techniques are applied to acquired data. With destructive-read memory, complex and costly security is not required for stored data. In one embodiment, a write-back mechanism, which may employ security, is responsible for enforcing usage restrictions. If the write-back mechanism determines continued access to acquired data is allowed, then it writes back the data as it is destructively read from the memory.

REFERENCES:
patent: 6178479 (2001-01-01), Vishin
patent: 2 305 339 (1997-04-01), None
Microsoft Computer Dictionary, 4th Edition, Microsoft Press, 1999, pp. 36 and 464.

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