Limited use data storing device
First Claim
Patent Images
1. A memory device comprising:
- a substrate;
a data storage medium on the substrate; and
machine readable data stored in the data storage medium and having a first readability that is readable by a first type of data read system, the machine readable data including;
at least one first portion having a readability modifiable by a limited expected lifetime to a second readability that is not readable by the first type of data read system;
at least one second portion having a readability not modifiable by the limited expected lifetime; and
at least one third portion having a readability not modifiable by the limited expected lifetime;
wherein the at least one first portion contains read-control information that causes data to be read from the at least one second portion when the at least one first portion has the first readability, and causes data to be read from the at least one third portion when the at least one first portion has the second readability.
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Abstract
Embodiments of methods and systems for controlling access to information stored on memory or data storage devices are disclosed. In various embodiments, methods of retrieving information from a data storage device previously deactivated by modification or degradation of at least a portion of the data storage device are disclosed.
199 Citations
14 Claims
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1. A memory device comprising:
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a substrate; a data storage medium on the substrate; and machine readable data stored in the data storage medium and having a first readability that is readable by a first type of data read system, the machine readable data including; at least one first portion having a readability modifiable by a limited expected lifetime to a second readability that is not readable by the first type of data read system; at least one second portion having a readability not modifiable by the limited expected lifetime; and at least one third portion having a readability not modifiable by the limited expected lifetime; wherein the at least one first portion contains read-control information that causes data to be read from the at least one second portion when the at least one first portion has the first readability, and causes data to be read from the at least one third portion when the at least one first portion has the second readability. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A memory device comprising:
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a substrate; a data storage medium on the substrate; and machine readable data stored in the data storage medium and having a first readability, at least a portion of the machine readable data having a readability that is modifiable to a second readability by a limited expected lifetime through degradation of at least one of the substrate or the data storage medium by at least one of light, heat, moisture, chemicals, an electrical field, or a magnetic field; wherein machine readable data having the first readability is readable by a first type of data read system and wherein machine readable data having the second readability is not readable by the first type of data read system. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification