A. digital timestamps are provided by financial institutions.

B. the realization of digital timestamp requires digital signature.

C. the realization of digital timestamp does not need encryption technology.

D the time of digital timestamp can be set at will.

Look at the answers and analyze the correct answer B.

Time cutting is an encrypted voucher document, which includes three parts: the summary of the file that needs to be cut with time; Date and time when DTS received the file; Digital signature of DTS. Reference textbook P65.

Knowledge points of this topic: safety technology,

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