Method and apparatus for security in a data processing system
OwnerPhilip Hawkes, Nikolai K. N. Leung +1inventors
InventorsPhilip Hawkes, Nikolai K. N. Leung, Gregory G. Rose
Life of this patent
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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. The short-time key is available with each broadcast message, wherein sufficient information to calculate the short-time key is provided in an Internet protocol header preceding the broadcast content. Broadcasts are then encrypted using the short-time key, wherein the user decrypts the broadcast message using the short-time key.
Claims24
A method for secure transmissions, the method comprising:
- determining a short term key for a message for transmission, the short term key having a short term key identifier;
- determining an access key for the message, the access key having an access key identifier;
- encrypting the message with the access key;
- forming an Internet protocol header comprising the short term key identifier;
- and
- transmitting the encrypted message with the Internet protocol header.
A method for secure reception of a transmission, the method comprising:
- receiving a short term key identifier specific to a transmission, the short term key identifier corresponding to a short term key;
- determining an access key based on the short term key identifier;
- encrypting the short tern key identifier with the access key to recover the short term key;
- and
- decrypting the transmission using the short term key.
In a wireless communication system supporting a broadcast service option, an infrastructure element comprising:
- a receive circuitry;
- a user identification unit, operative to recover a short-time key for decrypting a broadcast message, comprising:
- processing unit operative to decrypt key information;
- and
- a mobile equipment unit adapted to apply the short-time key for decrypting the broadcast message, comprising:
- memory storage unit for storing a plurality of short term keys and short term key identifiers.
An infrastructure element for a wireless communication system, comprising:
- means for receiving a short term key identifier specific to a transmission, the short term key identifier corresponding to a short term key;
- means for determining an access key based on the short term key identifier;
- means for encrypting the short term key identifier with the access key to recover the short term key;
- and
- means for decrypting the transmission using the short term key.
A digital signal storage device, comprising:
- first set of instructions for receiving a short term key identifier specific to a transmission, the short term key identifier corresponding to a short term key;
- second set of instructions for determining an access key based on the short term key identifier;
- third set of instructions for encrypting the short term key identifier with the access key to recover the short term key;
- and
- fourth set of instructions for decrypting the transmission using the short term key.
A storage device having stored a communication signal transmitted on a carrier wave, wherein the communication signal comprising:
- a first portion corresponding to a short term key identifier, the short term key identifier having a corresponding short term key;
- and
- a second portion corresponding to a transmission payload encrypted using the short term key.
Dependencies are inferred from the claim text.