Method of local data distribution preserving rights of a remote party

• US 20020083346A1
• Filed: 12/03/2001
• Published: 06/27/2002
• Est. Priority Date: 12/21/2000
• Status: Abandoned Application

• Current Assignee: Texas Instruments, Inc.
• Original Assignee: Texas Instruments, Inc.
• Inventors: Rowlands, Jonathan L.
• Application Number:
  US09/998,234
• Publication Number:
  US 20020083346A1
• Time in Patent Office: Days
• US Class Current: 713/201
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/335 for accessing specific resources, e.g. using Kerberos tickets
• CPC Class Codes: G06Q 20/382 insuring higher security of transaction
• CPC Class Codes: G06Q 30/02 Marketing; Price estimation or determination; Fundraising
• CPC Class Codes: H04L 2209/56 Financial cryptography, e.g. electronic payment or e-cash
• CPC Class Codes: H04L 2209/603 Digital right managament [DRM]
• CPC Class Codes: H04L 9/083 involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]

Abstract

A method and system of data distribution of musical data preserving the rights of a remote party employing cryptographic keys both a public key and a private key whereby a recipient must know a secret key in order to read some protected data. The sender must know a key to send the data which key being a shared secret of the sender and receiver in the private key case. This private key cryptography enables a secure two-way dialog between certain parties, while public key cryptography enables secure one way communication from anyone to a certain recipient.

Claims

1. A method of data distribution preserving rights of a remote party comprising the steps of:

an authorized user locally transmitting data to new user; and

authorizing the receiver'"'"'s use of the data by a trusted agent.

2. A method of data distribution preserving rights of a remote party comprising the steps of:

an authorized user locally transmitting the data to an unauthorized receiver and the unauthorized receiver contacting a trusted authorizing agent before the full utility of the data is made available to the receiver.

3. A method of data distribution preserving rights of a remote party comprising the steps of:

the sender choosing an encryption key for the receiver'"'"'s use;

the sender encrypting the data using the key;

the sender encrypting the encryption key using a public encryption key of a trusted agent;

the sender locally transmitting both the encrypted data and the encrypted key to the receiver;

the receiver and the trusted agent negotiating licensing and payment for the data;

the receiver transmitting the encrypted key to the trusted agent;

the trusted agent decrypting the encryption key; and

the trusted agent sending the decrypted encryption key to the receiver to receive the full data.

4. The method of claim 3 including the further step of the receiver choosing a new encryption key unknown to the sender and encrypting the data with the new encryption key.

5. A method of data distribution preserving rights of a remote party comprising the steps of:

the receiver negotiating licensing and payment with a trusted agent;

the agent transmitting a ticket to a receiver;

the sender interrogating the receiver to determine if the ticket is valid and halts if not;

the sender transmitting the un-encrypted data to the receiver.

6. The method of claim 5 including the step of the receiver chooses a key and encrypts the data.