Device pairing
First Claim
1. A security module for use with a first device to be paired with a second device, the security module having a processor and a memory adapted to store a device state that indicates whether the first decoder shall be a master or a slave decoder, wherein the device state is changeable.
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Abstract
The invention relates to pairing a slave device with a master device, for example decoders in a conditional access system. There is provided a security module that stores a device state that indicates whether a decoder shall be a master or a slave decoder. There is also provided a method in a conditional access system of providing a device with a device state stored on a security module. It is detected that the security module is in connection with the device and the device state is transferred from the security module to the device. There is further provided a method of pairing a slave device with a master device. The slave device asks the master device to identify itself, the master device returns an identification, and if the slave device has not yet been paired with a master device, it checks the identity of the master device and, if the identity is verified pairs with the master device. There is also provided a first, slave, device for pairing with a second, master, device. The first device comprises an interface for sending an identification command to and receiving an identification message from the master device, and a processor for checking the identity of the second device and pairing the first device with the second device.
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Citations
10 Claims
- 1. A security module for use with a first device to be paired with a second device, the security module having a processor and a memory adapted to store a device state that indicates whether the first decoder shall be a master or a slave decoder, wherein the device state is changeable.
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4. A method in a conditional access system of providing a device with a device state, the device state being stored on a security module and informing the device whether it should act as a master device or a slave device, the method comprising the steps of:
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detecting that the security module is in connection with the device; and
transferring the device state from the security module to the device. - View Dependent Claims (5, 6)
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7. A method of pairing a slave device with a master device, the method comprising the following steps:
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sending a command from the slave device asking the master device to identify itself;
sending from the master device to the slave device, a message identifying the master device;
the method being characterised in that wherein;
if the slave device has not yet been paired with a master device;
checking by the slave device the identity of the master device, using the received message; and
, if the identity is verifiedpairing the slave device with the master device. - View Dependent Claims (8, 9)
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10. A first device for pairing with a second device, the first device acting as a slave device and the second device acting as a master device, the first device comprising:
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an interface for;
sending a command asking the second device to identify itself; and
receiving from the second device a message identifying the second device;
wherein the first device further comprises;
a processor for checking, if the first device has not yet been paired with a master device, the identity of the second device; and
, if the identity is verifiedpairing the first device with the second device.
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Specification