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Enhanced circuit structure for realizing physically unclonable function

A circuit structure and enhanced technology, applied in the protection of internal/peripheral computer components, etc., can solve problems such as easy detection and tampering

Inactive Publication Date: 2018-04-17
BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although the fuse PUF technology solves the problem of PUF stability and anti-bus detection, because the fuse structure is placed in the scribe groove, it is easy to be found and tampered with. This is a new problem presented by fuse PUF in practical applications.

Method used

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  • Enhanced circuit structure for realizing physically unclonable function
  • Enhanced circuit structure for realizing physically unclonable function
  • Enhanced circuit structure for realizing physically unclonable function

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Embodiment Construction

[0020] According to the present invention, if figure 2 , providing an enhanced circuit structure (200) with physically unclonable functions, including a fuse structure (210) and a signal processing unit (220). Utilizing the engineering deviation of the scribing position during scribing, the fuse structures (including fuse lines and fuse circuits) at different positions are in different physical states of "connection" and "disconnection"; and through the signal processing unit, different connection and disconnection states The fuse line and the signal transmitted by the corresponding fuse circuit are identified as digital logic signals of "0" or "1".

[0021] image 3 For illustrating an embodiment of the present invention, the connection relationship between the Fuse structure (210) in the scribe groove and the signal processing unit (220) inside the chip is described in detail.

[0022] Wherein, the fuse structure (210) includes fuse lines and fuse circuits. The input par...

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Abstract

The invention provides an enhanced circuit structure for realizing a physically unclonable function (PUF). The enhanced circuit structure is used for realizing the PUF. By utilizing a principle that adeviation exists when a scribing blade passes through a central line of a scribing slot in a chip scribing process, fuses arranged in different positions of the scribing slot are broken by scribing probabilistically. A circuit connected with the fuses exists in the scribing slot, so that signals transmitted in the fuses broken and unbroken by scribing present different signal states; the states are identified through a signal processing unit; and a data result of the fuse PUF is output. Compared with an existing general circuit structure for realizing the PUF, the enhanced circuit structure is higher in security, and PUF data is not easy to steal and clone.

Description

technical field [0001] The invention relates to physical unclonable technology and information security technology, in particular to an enhanced circuit structure for realizing the physical unclonable function. Background technique [0002] In recent years, physically unclonable function (PUF), as a method of trusted identification of chips, has been widely used in the fields of chip identification and encryption operations, and has played a vital role in improving chip security. effect. Because PUF needs to use the random elements in the physical system of the chip that are only related to the process deviation, solidify to form a unique physical characteristic of a certain chip, and realize the unique and non-replicable identity information of the chip. Such as using device characteristic deviation (such as based on coating capacitance deviation, threshold voltage deviation, resistance deviation, etc.); using analog circuit characteristic deviation (such as based on offse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F21/71
CPCG06F21/71
Inventor 廖昱旻刘戬
Owner BEIJING CEC HUADA ELECTRONIC DESIGN CO LTD
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