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Question

Which systems use a timestamp?

i) Public-Key Certificates
ii) Public announcements
iii) Publicly available directories
iv) Public-Key authority

a.

i) and ii)

b.

iii) and iv)

c.

i) and iv)

d.

iv) only

Answer: (c).i) and iv)

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Q. Which systems use a timestamp? i) Public-Key Certificates ii) Public announcements iii) Publicly available directories iv) Public-Key authority

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