| 摘要 |
A method for enabling limitation of service access, wherein a service provider offers at least one service and a user possesses multiple different digital identities that can be used to invoke or register with the service, access to the service requiring an account at a third party entity, the user registers his digital identities with the account and agrees on a secret with the third party entity, the method including: the user assigning to his different digital identities counter values, the user requesting the service employing a specific digital identity and calculating a verification value—first verification value v1—by applying an encryption algorithm on the secret and the counter value assigned to the digital identity employed for the service request, the third party entity receiving the first verification value, applying the encryption algorithm to reconstruct the employed counter value and providing information on whether the reconstructed counter value exceeds a limit.
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