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US 9,317,981 B2Granted
Method and device for protecting products against counterfeiting
AssigneeAtmel Corporation
InventorUlrich Friedrich
Life of this patent
Estimating the term…
Abstract
A method for protecting a product against counterfeiting is provided that has a transponder associated with the product, upon which at least one unique identifier is stored, wherein a flag in a set or cleared state is associated with the identifier, and when the flag is set, read access to the identifier by a reader is only permitted after authentication. The invention further relates to a transponder for protecting a product against counterfeiting.
Claims27
A method comprising:
- receiving a request to access a first unique identifier stored in a shadow memory area of a transponder, read access to the first identifier being based on a state of a flag and on knowledge of secret shadow memory access information, the transponder having a second unique identifier stored in a second memory area;
- requiring authentication prior to permitting read access to the first identifier in response to the state of the flag having a first value;
- and
- permitting read access to the first identifier when the request includes the secret shadow memory access information.
1 more element
A transponder comprising:
- a shadow memory area storing a first unique identifier, read access to the first identifier being based on a state of a flag and on knowledge of secret shadow memory access information;
- a second memory area storing a second unique identifier;
- and
- one or more computer-readable non-transitory storage media coupled to the memory areas that embody logic that is operable when executed to:
- receive a request to access the first identifier stored in the shadow memory area;
- require authentication prior to permitting read access to the first identifier in response to the state of the flag having a first value;
- and
- permit read access to the first identifier when the request includes the secret shadow memory access information.
5 more elements
One or more non-transitory computer-readable storage media that embody logic that is operable when executed to:
- receive a request to access a first unique identifier stored in a shadow memory area of a transponder, read access to the at least one unique identifier being based on a state of a flag and on knowledge of secret shadow memory access information, the transponder having a second unique identifier stored in a second memory area;
- require authentication prior to permitting read access to the first identifier in response to the state of the flag having a first value;
- and
- permit read access to the first identifier when the request includes the secret shadow memory access information.
1 more element
Dependencies are inferred from the claim text.