Linux virtual file system-based tamper-proof method and system
A virtual file system and anti-tampering technology, applied in instruments, electrical digital data processing, digital data protection, etc., can solve problems such as access errors and low file security
Active Publication Date: 2016-05-04
山东中创软件商用中间件股份有限公司
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[0003] However, current file anti-tampering technologies are usually developed and applied based on the technical concept of post-event recovery. Once malicious tampering events against the Linux virtual file system occur, specific files will often be tampered within a period of time. When the legitimate user needs to access the specific file, then obviously there will be an access error. It can be seen that in the prior art, when attacked by malicious tampering behavior, the probability of the legitimate user's access result being wrong is quite high. , file security is low
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[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. 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.
[0036] The embodiment of the present invention discloses a tamper-proof method based on a Linux virtual file system. The Linux virtual file system includes a file operation table and an index node operation table; see figure 1 As shown, the above-mentioned anti-tampering methods include:
[0037] Step S11: when the file needs to be protected against tampering, call a pre-stored interrupt service routine containing the file's tamper-resistant code;
[0038] St...
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The invention discloses a Linux virtual file system-based tamper-proof method and system. The method comprises the following steps: when tamper-proof protection is required for files, calling a pre-stored interrupt service routine which comprising a file tamper-proof code; utilizing the address information of the interrupt service routine to respectively modify the routine address information currently stored in a file operation table and the routine address information currently stored in an index node operation table so as to ensure that the routine address information in the file operation table and the routine address information in the index node operation table are consistent to the address information of the interrupt service routine; and after modifying the routine address information, utilizing the interrupt service routine to carry out corresponding tamper-proof processing on all the file operation requests received in a Linux virtual file system. The method and system disclosed in the invention are capable of preventing the access results of legal users from errors when the file system is attacked by malicious tamper behaviors, so that the safety of file access is improved.
Description
technical field [0001] The invention relates to the technical field of file protection, in particular to an anti-tampering method and system based on a Linux virtual file system. Background technique [0002] Anti-tampering technology is a key technical content in the fields of file protection, system security, intrusion detection, etc. Its function is to protect the consistency of specific files or file directories. Anti-tampering technology is widely used in various file systems. With the development of virtual file system, anti-tampering technology has also begun to be applied in Linux virtual file system. [0003] However, current file anti-tampering technologies are usually developed and applied based on the technical concept of post-event recovery. Once malicious tampering events against the Linux virtual file system occur, specific files will often be tampered within a period of time. When the legitimate user needs to access the specific file, then obviously there wi...
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IPC IPC(8): G06F21/62
CPCG06F21/6218
Inventor 唐林林刘金鑫王立建张涛
Owner 山东中创软件商用中间件股份有限公司