Device for generating an encrypted key and method for providing an encrypted key to a receiver

摘要

A device for generating an encrypted master key. The device comprises at least one input interface configured to receive a receiver identifier, a service provider identifier and a master key for the service provider; a memory configured to store a secret of the device; a processor configured to: process the receiver identifier using the secret to obtain a root key, process the service provider identifier using the root key to obtain a top key and process the master key using the top key to obtain an encrypted master key; and an output interface configured to output the encrypted master key. Also provided is a method for providing an encrypted master key to a receiver. An advantage is that the device can enable a new service provider to provide services to a receiver using an already deployed smartcard.

主权项

1. A device for generating an encrypted master key, the device comprising:
at least one input interface configured to receive a receiver identifier, a service provider identifier associated with a service provider and a master key for the service provider, the service provider being a secondary service provider; a memory configured to store a secret information of the device; a processor configured to:
process the receiver identifier using the secret information to obtain a root key;process the service provider identifier using the root key to obtain a top key; andprocess the master key using the top key to obtain an encrypted master key; andan output interface configured to output the encrypted master key.