Chip and inner module encryption system thereof

An encryption system and chip technology, applied in instruments, electrical digital data processing, computer security devices, etc., can solve the problems of high cost of changing decryption units, poor flexibility, etc., to improve the difficulty of cracking, improve reliability, and enhance flexibility. Effect
CN102779254AActive Publication Date: 2012-11-14SHENZHEN RENERGY TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHENZHEN RENERGY TECH
Publication Date
2012-11-14

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Abstract

The invention belongs to the technical field of a chip design and provides a chip and inner module an encryption system thereof. The system comprises a nonvolatile storage module and a processing and controlling circuit, wherein the nonvolatile storage module is used for storing an encryption protection policy and a decipherment algorithm; and the processing and controlling circuit is used for reading and analyzing the encryption protection policy stored in the nonvolatile storage module when peripheral equipment is connected with an invasion interface of the chip, and protecting a protected inner module of the chip according to the analyzed encryption protection policy. According to the chip and the inner module encryption system thereof, the decipherment algorithm in a software form and the processing and controlling circuit in a hardware manner are separately realized, so that when the decipherment algorithm needs to be changed, a user can directly change the decipherment algorithm stored in the nonvolatile storage module; the chip does not need to be taped out again, so that the changing cost is extremely reduced and the utilization flexibility is enhanced; and the user can customize the decipherment algorithm and the cracking difficulty is improved, so that the reliability of the chip is improved.
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Description

technical field

[0001] The invention belongs to the technical field of chip design, in particular to a chip and its internal module encryption system. Background technique

[0002] With the development of integrated circuits, the design of electronic products is developing in an open direction, and more hardware solutions have been made public. In order to facilitate programming and debugging, chips generally provide corresponding programming interfaces, debugging interfaces or other external connections. The interface of the device.

[0003] The open interface will make the functional modules inside the chip vulnerable to illegal intrusion from the outside, and the operating mechanism inside the chip is easy to be cracked. For this reason, the existing technology provides the following two ways to protect the internal modules of the chip:

[0004] 1. Complete protection mode. Such as figure 1 As shown, in this way, the user writes an unencrypted program to the non-volati...

Claims

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