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Which systems use a timestamp?i) Public-Key Certificatesii) Public announcementsiii) Publicly available directoriesiv) Public-Key authority(a) i) and ii)(b) iii) and iv)(c) i) and iv)(d) iv) onlyI got this question in an interview for job.The question is from Public Keys and X.509 Certificates-I topic in section Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

Answer»

Right ANSWER is (c) i) and IV)

Explanation: Public ANNOUNCEMENTS and Public CERTIFICATES involve the use of timestamps.



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