Time termination high-performance grading data erasing method for synthetic aviation electronic system
An avionics system and data erasing technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc. The superiority of hierarchical security management and other issues to achieve good security and timeliness, balance security and timeliness, and solve high time-consuming effects
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[0029] 1. Explanation of the parameter symbols used in the invention
[0030] F: file name;
[0031] L: file size, in megabytes;
[0032] E: Whether the file is encrypted, E=0 the file is not encrypted, E=1 the file is encrypted;
[0033] T: Erase allowed time, assigned by the system, the maximum time allowed by the system when erasing specified files;
[0034] R i : File security level, the total number of levels is freely set by the system according to needs, and the ASAAC specification defaults to level 4 (Top Secret R 1 , Confidential R 2 , Secret R 3 , Unrated R 4 , R i is an integer, arranged from small to large, and the security level shown decreases in order);
[0035] R: the average value of all security levels of the current system, the present invention assumes that the current system has n security levels, then , R∈{R 1 , R 2 ,...,R i ,...,R n};
[0036] M: Master algorithm for data erasure;
[0037] h: cluster group length;
[0038] m: the number ...
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