Format Of X.509 Certificate And Avoiding Public Key Cryptography For Pair-wise Exchange of Symmetric Keys

Question

1.    The format of an X.509 certificate is described in

a.    XML
b.    ASCII
c.    ANS.1
d.    HTML

2.    Public key cryptography is used to avoid the pair wise exchange of symmetric keys between users. If there is a set of N users, then the number of possible pair wise keys is approximately

a.    N
b.    N log N
c.    N2
d.    2N

Summary

These multiple choice questions belong to Computer Science. The 1st question discusses about the format of X.509 certificate. The 2nd question is about public key cryptography used to avoid pair wise exchange of symmetric keys between users.

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