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  Method and apparatus for security in a data processing systemUSPTO Application #: 20070116282Title: Method and apparatus for security in a data processing system 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. (end of abstract) Agent: Qualcomm Incorporated - San Diego, CA, US Inventors: Philip Michael Hawkes, Raymond T. Hsu, Ramin Rezaiifar, Gregory G. Rose, Paul E. Bender, Jun Wang, Roy Franklin Quick, Arungundram C. Mahendran, Parag A. Agashe USPTO Applicaton #: 20070116282 - Class: 380239000 (USPTO) Related Patent Categories: Cryptography, Video Cryptography, Video Electric Signal Modification (e.g., Scrambling), Encrypted Code Control Signal The Patent Description & Claims data below is from USPTO Patent Application 20070116282. Brief Patent Description - Full Patent Description - Patent Application Claims
CLAIM OF PRIORITY UNDER 35 U.S.C. .sctn.120 [0001] The present Application for Patent is a Continuation and claims priority to patent application Ser. No. 10/233,188, entitled "Method and Apparatus for Security in a Data Processing System" filed Aug. 28, 2002, now allowed, which is a Continuation in Part and claims priority to patent application Ser. No. 09/933,972 entitled "METHOD AND APPARATUS FOR SECURITY IN A DATA PROCESSING SYSTEM" filed Aug. 20, 2001, and assigned to the assignee hereof and hereby expressly incorporated by reference herein. BACKGROUND [0002] 1. Field [0003] The present invention relates to data processing systems generally and specifically, to methods and apparatus for security in a data processing system. [0004] 2. Background [0005] Security in data processing and information systems, including communications systems, contributes to accountability, fairness, accuracy, confidentiality, operability, as well as a plethora of other desired criteria. Encryption, or the general field of cryptography, is used in electronic commerce, wireless communications, broadcasting, and has an unlimited range of applications. In electronic commerce, encryption is used to prevent fraud in and verify financial transactions. In data processing systems, encryption is used to verify a participant's identity. Encryption is also used to prevent hacking, protect Web pages, and prevent access to confidential documents. [0006] Asymmetric encryption system, often referred to as a cryptosystem, uses a same key (i.e., the secret key) to encrypt and decrypt a message. Whereas an asymmetric encryption system uses a first key (i.e., the public key) to encrypt a message and uses a different key (i.e., the private key) to decrypt it. Asymmetric cryptosystems are also called public key cryptosystems. A problem exists in symmetric cryptosystems in the secure provision of the secret key from a sender to a recipient. Further, a problem exists when keys or other encryption mechanisms are updated frequently. In a data processing system methods of securely updating keys incur processing time, memory storage and other processing overhead. In a wireless communication system, updating keys uses valuable bandwidth used for transmission. [0007] The prior art does not provide a method for updating keys to a large group of mobile stations in order that they may access an encrypted broadcast. There is a need, therefore, for a secure and efficient method of updating keys in a data processing system. Further, there is a need for a secure and efficient method of updating keys in a wireless communication system. SUMMARY [0008] Embodiments disclosed herein address the above stated needs by providing a method for security in a data processing system. [0009] In one aspect a method for secure transmissions includes determining a registration key specific to a participant in a transmission, determining a first key, encrypting the first key with the registration key, determining a second key, encrypting the second key with the first key and updating the first and second keys. [0010] In another aspect, a method for secure reception of a transmission includes receiving a registration key specific to a participant in a transmission, receiving a first key, decrypting the first key with the registration key, receiving a second key, decrypting the second key with the first key, receiving a broadcast stream of information, and decrypting the broadcast stream of information using the second key. [0011] In still another aspect a wireless communication system supporting a broadcast service option has an infrastructure element including a receive circuitry, a user identification unit, operative to recover a short-time key for decrypting a broadcast message, and a mobile equipment unit adapted to apply the short-time key for decrypting the broadcast message. The user identification unit includes a processing unit operative to decrypt key information, and a memory storage unit for storing a registration key. BRIEF DESCRIPTION OF THE DRAWINGS [0012] FIG. 1A is a diagram of a cryptosystem. [0013] FIG. 1B is a diagram of a symmetric cryptosystem. [0014] FIG. 1C is a diagram of an asymmetric cryptosystem. [0015] FIG. 1D is a diagram of a PGP encryption system. [0016] FIG. 1E is a diagram of a PGP decryption system. [0017] FIG. 2 is a diagram of a spread spectrum communication system that supports a number of users. [0018] FIG. 3 is a block diagram of the communication system supporting broadcast transmissions. [0019] FIG. 4 is a block diagram of a mobile station in a wireless communication system. [0020] FIG. 5 is a model describing the updating of keys within a mobile station used for controlling broadcast access. Continue reading... Full patent description for Method and apparatus for security in a data processing system Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Method and apparatus for security in a data processing system patent application. ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. 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