Opportunistic use of null packets during encryption/decryption

a technology of null packets and encryption, applied in the field of data encryption and decryption, can solve the problems of loss of substantial revenues of pay-per-view programming, and unauthorised copying of data

Active Publication Date: 2007-03-15
ZENITH F ECTRONICS LLC
View PDF49 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This approach effectively thwarts unauthorized copying by ensuring secure encryption and decryption processes, maintaining content security and reducing revenue losses for pay-per-view providers.

Problems solved by technology

There are many systems in which the unauthorized copying of data has undesired consequences.
For example, in pay-per-view systems such as those offered by hotels, motels, and cable systems, the suppliers offering pay-per-view programming lose substantial revenues if their programs are pirated.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Opportunistic use of null packets during encryption/decryption
  • Opportunistic use of null packets during encryption/decryption
  • Opportunistic use of null packets during encryption/decryption

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] In FIG. 1, an example encryption encoder 8 of a copy protection transmitter includes a PID filter 10 that receives an MPEG transport stream and that determines which packets in the. MPEG transport stream contain data to be encrypted. As discussed below, the PID filter 10 also identifies null packets that are to be replaced with message segments MS that give the receiver sufficient information for decrypting the encrypted program data in the received signal, and the PID filter 10 further identifies packets containing information that is not to be encrypted.

[0032] A dynamic program key and modification key generator 12 dynamically generates program keys PK that are applied by a first encryption engine 14 in order to encrypt the program data in the MPEG transport stream that has been selected for encryption. The first encryption engine 14, for example, may be a single wrap encryption engine, and may be arranged to apply the single wrap encryption process specified in the Advanc...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The use of keys to encrypt data in a transmitter and to decrypt encrypted data in a receiver are synchronized in accordance with a synchronization signal that opportunistically replaces a null packet in an MPEG transport stream. Additionally or alternatively, key related information is transmitted and / or received in place of a null packet in the MPEG transport stream and is used to encrypt and / or decrypt data transmitted and / or received in the MPEG transport stream.

Description

RELATED APPLICATIONS [0001] This application is a division of U.S. patent application Ser. No. 11 / 137,272, filed on May 25, 2005.TECHNICAL FIELD OF THE INVENTION [0002] The present invention relates to the encryption and decryption of data transmitted between a transmitter and a receiver and, more particularly, to the encryption and decryption of both data and the encryption keys used to encrypt the data. BACKGROUND OF THE INVENTION [0003] There are many systems in which the unauthorized copying of data has undesired consequences. For example, in pay-per-view systems such as those offered by hotels, motels, and cable systems, the suppliers offering pay-per-view programming lose substantial revenues if their programs are pirated. [0004] Many tools are commonly available at hardware stores, hobby shops, university laboratories, and are provided by hackers and experts to enable the reverse-engineering of all aspects of data transmission systems, including pay-per-view systems. Accordin...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & AuthorityApplications(United States)
IPC IPC(8): H04L9/00
CPCG06F21/10H04L2209/605H04L63/0428H04L2463/062H04N7/1675H04N21/235H04N21/2362H04N21/23895H04N21/435H04N21/43853H04N21/47211H04L9/0662H04L9/0869H04L2209/12G06F2221/2107
InventorHAUGE, RAYMOND C.LEWIS
OwnerZENITH F ECTRONICS LLC