SECURE SERIAL NUMBER

摘要

A serial number for a software product is secured with an authenticator value. The authenticator value and the serial number are evaluated entirely by a remote authentication server such that no cryptographic authentication occurs on a local computer on which the software product is being installed. An abbreviated portion of the authenticator value is used for offline authentication.

主权项

1. A method performed on a computing device, the method comprising:
receiving a product key comprising a serial number, an authenticator value that is based on the serial number and a secret, and a checksum, where the authenticator value includes an offline authenticator value, and where the received product key is configured for online and offline authorization; providing the serial number and either the authenticator value or the offline authenticator value for authentication; and receiving, based on the authentication, an indication that the received product key is valid or invalid.