Patent ID: 8453250
Filing Date: 2013-05-28
Classification: G06F

Abstract:
1. An option management system for a digital device comprising: a user terminal; a client terminal; and a digital device connected via a network to the user terminal and the client terminal, which performs a control process for validation or invalidation if a license key purchased by the user for an optional function of each software for monitoring, controlling and maintaining the device itself is inputted from the client terminal, wherein the digital device acquires a new optional function from a sever, the new optional function enabled by performing the control process, the digital device comprises a receiving unit that receives the license key, a decoding unit, a determining unit that determines the validity, a storing unit, a decrypting unit, a performing unit that performs validation or invalidation of a designated function, and a sending unit that sends a response to the user terminal, and the client terminal holds the license valid for each optional function of software, reads the license key information to the digital device at the same time, totals the number of the licenses, compares the total value with the number of licenses valid for each optional function of software held in the client terminal, and displays a warning notification if unmatched.