Safety requirement as follows:

Physical secrecy: can not additions/deletions or replace the hardware/software unless with special stills and methods; only using special techniques could input, storage, visit and modify to the sensitive data; any part of the breakage could not cause the sensitive data leakage.

Logic secrecy: when it in the sensitive condition, is not allowed two or more principal to take part in; the input passwords must be protected by the same way of other sensitive data.

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