Tag authentication method using rotation, and tag and reader performing the method
First Claim
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1. A tag authentication method of a reader, the method comprising:
- generating a first random number and transmitting the first random number to a tag;
receiving a second random number and a first verification value from the tag;
generating a rotation factor using the second random number and a first secret value;
computing a second verification value based on the first random number, a second secret value, and the rotation factor; and
comparing the first verification value and the second verification value.
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Abstract
A tag authentication method, and a tag and reader performing the method are provided. The tag authentication method, including: a reader generating a first random number and transmitting the first random number to a tag; the reader receiving a second random number and a first verification value from the tag; the reader computing a second verification value based on the first random number and the second random number; and the reader comparing the first verification value and the second verification value.
9 Citations
18 Claims
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1. A tag authentication method of a reader, the method comprising:
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generating a first random number and transmitting the first random number to a tag; receiving a second random number and a first verification value from the tag; generating a rotation factor using the second random number and a first secret value; computing a second verification value based on the first random number, a second secret value, and the rotation factor; and comparing the first verification value and the second verification value. - View Dependent Claims (2, 3, 4, 5)
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6. A tag authentication method of a tag, the method comprising:
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generating a second random number; receiving a first random number from a reader; generating a rotation factor using the second random number and a first secret value; computing a first verification value based on the first random number, a second secret value, and the rotation factor; and transmitting the second random number and the first verification value to the reader. - View Dependent Claims (7, 8, 9, 10)
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11. A reader for authenticating a tag, the reader comprising:
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a first random number unit to generate a first random number and to transmit the first random number to the tag; a receiving unit to receive a second random number and a first verification value from the tag; a second verification value computation unit to generate a rotation factor using the second random number and a first secret value, and to compute a second verification value based on the first random number, a second secret value, and the rotation factor; and a comparison unit to compare the first verification value and the second verification value. - View Dependent Claims (12, 13, 14)
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15. A tag to be authenticated by a reader, the tag comprising:
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a second random number generation unit to generate a second random number; a first random number receiving unit to receive a first random number from the reader; a first verification value computation unit to generate a rotation factor using the second random number and a first secret value, and to compute a first verification value based on the first random number, a second secret value, and the rotation factor; and a transmission unit to transmit the second random number and the first verification value to the reader. - View Dependent Claims (16, 17, 18)
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Specification