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LSI design method and verification method

Inactive Publication Date: 2007-01-11
PANASONIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005] It is an object of the present invention to improve confidentiality of the circuit design data over conventional examples by employing encryption in the LSI design.

Problems solved by technology

Accordingly, designing the LSI by a limited designer(s) and / or at a limited location(s) is not always enough to maintain confidentiality of the circuit.

Method used

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  • LSI design method and verification method
  • LSI design method and verification method
  • LSI design method and verification method

Examples

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Embodiment Construction

[0037]FIG. 1 is a diagram showing a circuit design style proposed by the inventor of the present application. In the design style shown in FIG. 1, an encryption process SA and a decoding process SC of the design data are conducted so that a design / verification process SB can be conducted even if the contents of the confidential design data are not seen.

[0038] In the encryption process SA, confidential circuit design data 11 is encrypted to produce encrypted design data 12 and a cipher key 13. The encrypted design data 12 is provided to the user who conducts the design / verification process SB. The key 13 is also provided as required by the design / verification process SB.

[0039] In the design / verification process SB, the encrypted design data 12 is subjected to various processes without disclosing the contents of the original circuit. In the decoding process SC, encrypted design data 14 subjected to the design / verification process SB is decoded with a key 15 to produce original circu...

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PUM

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Abstract

An encryption process is employed in the LSI design so as to improve confidentiality of the circuit design data over conventional examples. In the encryption process, confidential circuit design data is encrypted to produce encrypted design data and a cipher key. The encrypted design data is provided to the user who conducts a design / verification process. The key is also provided as required. In the design / verification process, the encrypted design data is subjected to various processes without disclosing the contents of the original circuit. In a decoding process, the encrypted design data subjected to the design / verification process is decoded to produce original circuit design data.

Description

BACKGROUND OF THE INVENTION [0001] The present invention generally relates to design and verification of LSIs (large-scale integrated circuits). More particularly, the present invention relates to a technology for maintaining confidentiality of design data. [0002] In the LSI design, confidentiality of the contents of the circuit should sometimes be maintained. For example, in the LSI involved in data encryption, the encryption logic may possibly be decrypted if the contents of the circuit are known. [0003] Conventionally, an LSI requiring such preservation of confidentiality has been designed by a limited person(s) and / or at a specific location(s) so as to prevent the contents of the circuit from being known to other people. [0004] With recent increased complication and scale of the LSIs, many designers are engaged in the design of a single LSI. Accordingly, designing the LSI by a limited designer(s) and / or at a limited location(s) is not always enough to maintain confidentiality of...

Claims

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Application Information

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IPC IPC(8): G06F12/14G01R31/28G06F17/50G06F21/60G06F21/62G09C1/00H01L21/82H01L29/00
CPCG06F17/5022G06F21/75G06F21/6209G06F30/33
Inventor SHIOMI, KENTAROMOTOHARA, AKIRAFUJIWARA, MAKOTOYOKOYAMA, TOSHIYUKIFUJIMURA, KATSUYA
Owner PANASONIC CORP