Method of using a mobile device to authenticate a printed token and output an image associated with the token
First Claim
1. A method of using a mobile device to authenticate a printed token and output an image associated with the token, the token having a two dimensional pattern of coded data, the coded data having a plurality of coded data portions that each encode an identity and a different signature fragment of a digital signature, the signature fragment being only a part of the digital signature, the mobile device comprising a transmitter, a receiver, a sensor and processing means, the method comprising the steps of:
- using the sensor to sense at least one of the coded data portions within the two dimensional pattern of coded data;
using the processing means to determine the identity and the signature fragment encoded in the coded data portion sensed by the sensor;
using the transmitter to send first data to a remote computer system, the first data being indicative of the identity and the signature fragment being only part of the digital signature;
comparing the identity against valid identities;
verifying the signature fragment is a fragment of the digital signature associated with the identity;
authenticating the token in response to the signature fragment being a fragment of the digital signature and the identity matching one of the valid identities;
using the receiver to receive second data from the remote computer system in reply to the first data, the second data being indicative of whether the token is authentic;
determining an image associated with the token, using the unique identity; and
outputting the image from the mobile device in a visible form.
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Accused Products
Abstract
A method of using a mobile device to authenticate a printed token and output an image associated with the token, the mobile device comprising a sensor and processing means, the method comprising the steps of: using the sensor to sense coded data on the printed token; using the processing means to determine, from the sensed coded data, at least an identity of the token; authenticating the token using the identity; based on at least the identity, determining an image associated with the token; and outputting the image from the mobile device in a visible form.
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Citations
19 Claims
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1. A method of using a mobile device to authenticate a printed token and output an image associated with the token, the token having a two dimensional pattern of coded data, the coded data having a plurality of coded data portions that each encode an identity and a different signature fragment of a digital signature, the signature fragment being only a part of the digital signature, the mobile device comprising a transmitter, a receiver, a sensor and processing means, the method comprising the steps of:
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using the sensor to sense at least one of the coded data portions within the two dimensional pattern of coded data; using the processing means to determine the identity and the signature fragment encoded in the coded data portion sensed by the sensor; using the transmitter to send first data to a remote computer system, the first data being indicative of the identity and the signature fragment being only part of the digital signature; comparing the identity against valid identities; verifying the signature fragment is a fragment of the digital signature associated with the identity; authenticating the token in response to the signature fragment being a fragment of the digital signature and the identity matching one of the valid identities; using the receiver to receive second data from the remote computer system in reply to the first data, the second data being indicative of whether the token is authentic; determining an image associated with the token, using the unique identity; and outputting the image from the mobile device in a visible form. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification