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A data stream encryption method and system

An encryption method and data stream technology, applied in the field of data stream encryption methods and systems, can solve problems such as high cost, high development difficulty, and complicated implementation, and achieve the effects of reducing process cost, reducing development difficulty, and simplifying implementation methods.

Active Publication Date: 2019-03-26
LONTIUM SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when encrypting HDMI2.0 signals, HDCP2.2 requires the clock of the digital circuit to run at 600MHz, and if according to the architecture and algorithm of HDMI2.0 and HDCP2.2, to make the clock of the digital circuit run at 600MHz, you must Tape-out on a deep sub-micron process, which is costly, complex to implement, and difficult to develop

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  • A data stream encryption method and system
  • A data stream encryption method and system
  • A data stream encryption method and system

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Embodiment Construction

[0040] In order to make the purpose, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0041] The technical scheme of the present application is described in detail below in conjunction with accompanying drawing:

[0042] figure 1 It is a schematic flowchart of an embodiment of a data stream encryption method provided by the present invention.

[0043] refer to figure 1 As shown, the data stream encryption method...

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Abstract

The application discloses a method and system for encrypting a data stream, receiving a multimedia data stream; the multimedia data stream contains a plurality of pixels; according to the sequence of each pixel in the multimedia data stream, the multimedia data stream is decomposed into M One pixel data stream, the clock cycle of each pixel data stream is synchronized, and the clock cycle of the pixel data stream is M times the clock cycle of the multimedia data stream; M is a positive integer greater than 1; according to the preset time interval Generate a key, and use the key to encrypt the pixels in the M pixel data streams; the time interval is N times the clock cycle of the pixel data stream, and N is a positive integer. This solution can use a clock frequency lower than the clock frequency of the multimedia data stream to encrypt the pixels, which can realize the necessary functions in a lower process, reduce the process cost of using HDCP2.2 to encrypt HDMI2.0 signals, and can simplify the implementation way to reduce the difficulty of development.

Description

technical field [0001] The invention relates to the technical field of data communication, in particular to a method and system for encrypting data streams. Background technique [0002] HDMI (High Definition Multimedia Interface) is the abbreviation of high-definition multimedia interface. It can provide high bandwidth and transmit digital video and audio signals at the same time without loss. It is widely used in various consumer electronic devices, and its version has been upgraded at present. To the HDMI2.0 specification. [0003] In order to ensure that the high-definition signal transmitted by HDMI will not be illegally recorded, HDCP (High-bandwidth Digital Content Protection) technology has appeared. HDCP is the abbreviation of high-bandwidth digital content protection technology. It is used to encrypt the output signal of HDMI. When the HDMI output image is illegally copied, HDCP technology will interfere and reduce the quality of the copied image, thereby protecti...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L29/06H04L12/851
CPCH04L47/24H04L63/0428H04L63/1408H04L9/0637H04L63/0457H04N21/2347H04N21/2541H04N21/4627H04N21/242H04N21/4302
Inventor 孙超苏进夏洪锋
Owner LONTIUM SEMICON CORP