METHOD AND APPARATUS FOR SECURITY IN A DATA PROCESSING SYSTEM
First Claim
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1. A remote station supporting broadcast services, comprising:
- receive circuitry for receiving an encrypted packet of broadcast data;
a User Identification Module (UIM) coupled to the receive circuitry, comprising;
a secure memory storage unit, adapted for storing a broadcast access key; and
a processor adapted to decrypt the encrypted packet of broadcast data using the broadcast access key.
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Abstract
Method and apparatus for secure transmissions. Each user is provided a registration key. A long-time updated broadcast key is encrypted using the registration key and provided periodically to a user. A short-time updated key is encrypted using the broadcast key and provided periodically to a user. Broadcasts are then encrypted using the short-time key, wherein the user decrypts the broadcast message using the short-time key. One embodiment provides link layer content encryption. Another embodiment provides end-to-end encryption.
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Citations
42 Claims
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1. A remote station supporting broadcast services, comprising:
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receive circuitry for receiving an encrypted packet of broadcast data;
a User Identification Module (UIM) coupled to the receive circuitry, comprising;
a secure memory storage unit, adapted for storing a broadcast access key; and
a processor adapted to decrypt the encrypted packet of broadcast data using the broadcast access key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A method for a remote station to extract data from at least one encrypted packet of data provided by a broadcast service, comprising:
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receiving a broadcast access key for the broadcast service;
receiving an encrypted packet of data from a plurality of encrypted packets of data, wherein the each encrypted packet of data is associated with one short-term key from a plurality of short-term keys, wherein each short-term key is associated with a first number;
receiving the first number corresponding to the short-term key associated with the encrypted packet of data;
generating the short-term key using the broadcast access key and the first number; and
extracting a packet of data from the encrypted packet of data using the short-term key. - View Dependent Claims (18, 19, 20, 21, 22)
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23. A method for encryption key management in a communication system supporting broadcast services, comprising:
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generating a short-term key using a broadcast access key; and
encrypting a packet of data using the short-term key;
broadcasting the encrypted packet of data. - View Dependent Claims (24, 25, 26, 27, 28, 29, 30)
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31. A remote station adapted to extract data from at least one encrypted packet of data provided by a broadcast service, comprising:
receiver adapted for;
receiving a broadcast access key for the broadcast service;
receiving an encrypted packet of data from a plurality of encrypted packets of data, wherein the each encrypted packet of data is associated with one short-term key from a plurality of short-term keys, wherein each short-term key is associated with a first number;
receiving the first number corresponding to the short-term key associated with the encrypted packet of data;
generator adapted for generating the short-term key using the broadcast access key and the first number and means for extracting a packet of data from the encrypted packet of data using the short-term key. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A wireless apparatus adapted for encryption key management in a communication system supporting broadcast services, comprising:
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means for generating a short-term key using a broadcast access key;
means for encrypting a packet of data using the short-term key; and
means for broadcasting the encrypted packet of data. - View Dependent Claims (40, 41, 42)
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Specification