Method for personalizing an authentication token
First Claim
1. A system for generating secure passwords for use by at least one authentication server in authenticating a user of a smart card and a smart card-interface device, in response to the user seeking access to protected computer resources of at least one server, comprising:
- said smart card interface device operable to interact with said smart card to generate said secure passwords;
said smart card interface device including at least a dynamic variable generator;
said smart card including at least a key generation algorithm, and a password application, and said smart card storing at least;
(i) a secret key, (ii) a changing register value, and (iii) a seed value;
said password application generating said secure passwords by;
(i) combining said changing register value with a dynamic variable generated by said dynamic variable generator to produce a payload, (ii) encrypting said payload with said secret key to produce an encrypted payload and, (iii) combining least significant bits of said encrypted payload with least significant bits of said dynamic variable to produce a new secure password; and
said key generation algorithm;
(i) generating a new secret key and a new seed value following the generation of a first of said secure passwords and of said new secure password, said new secret key and said new seed value being derived from said secret key, said changing register value, and said seed value (ii) replacing said secret key and said seed value with said new secret key and said new seed value in storage of said smart card, and (iii) changing said changing register value by a change value to result in a new changing register value;
wherein, after generation of said first of said secure passwords and of said new secure password, said dynamic variable is changed to a new dynamic variable by said dynamic variable generator.
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Accused Products
Abstract
An authentication token using a smart card that an organization would issue to its customer, the smart card having a processor for executing a software application that is responsive to a user input to generate a one-time password as an output. The smart card co-operates with an interface device for inputting the user input and displaying the one-time password. The authentication token may be used in combination with a remote authentication server for validation of the password and hence authentication of the user.
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Citations
18 Claims
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1. A system for generating secure passwords for use by at least one authentication server in authenticating a user of a smart card and a smart card-interface device, in response to the user seeking access to protected computer resources of at least one server, comprising:
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said smart card interface device operable to interact with said smart card to generate said secure passwords; said smart card interface device including at least a dynamic variable generator; said smart card including at least a key generation algorithm, and a password application, and said smart card storing at least;
(i) a secret key, (ii) a changing register value, and (iii) a seed value;said password application generating said secure passwords by;
(i) combining said changing register value with a dynamic variable generated by said dynamic variable generator to produce a payload, (ii) encrypting said payload with said secret key to produce an encrypted payload and, (iii) combining least significant bits of said encrypted payload with least significant bits of said dynamic variable to produce a new secure password; andsaid key generation algorithm;
(i) generating a new secret key and a new seed value following the generation of a first of said secure passwords and of said new secure password, said new secret key and said new seed value being derived from said secret key, said changing register value, and said seed value (ii) replacing said secret key and said seed value with said new secret key and said new seed value in storage of said smart card, and (iii) changing said changing register value by a change value to result in a new changing register value;wherein, after generation of said first of said secure passwords and of said new secure password, said dynamic variable is changed to a new dynamic variable by said dynamic variable generator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of generating secure passwords for use by at least one authentication server in authenticating a user of an smart card and an smart card interface device, in response to the user seeking access to protected computer resources of at least one server, the method comprising:
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storing, by the smart card;
(i) a changing register value, (ii) a secret key, and (iii) a seed value;generating, by the smart card interface device, a dynamic variable; forwarding, by the smart card interface device, the dynamic variable to the smart card; combining, by the smartcard, the dynamic variable with the changing register value to produce a payload; encrypting, by the smart card, the payload using the secret key to produce an encrypted payload; combining, by the smart card, least significant bits of the encrypted payload with least significant bits of the dynamic variable to produce a new secure password; executing, by the smart card, a key generating algorithm to;
(i) produce a new secret key and a new seed value derived from said the changing register value, the secret key, and the seed value, (ii) replace the secret key and the seed value with the new secret key and the new seed value stored in the smart card and, (iii) change the changing register value by a change value to result in a new changing register value; andchanging the dynamic variable to a new dynamic variable. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification