How can signatures remain valid beyond the expiration dates of their keys, or, How do you verify a 20-year-old signature?
TCS,
473Post New Cryptography General Questions
How do digital timestamps support digital signatures?
What is the discrete log problem?
Explain the meaning of Cryptography.
What is NIST ?
What is SecurID ?
What is RSAREF?
Who issues certificates and how?
What is shamirs secret sharing scheme?
What are the most important attacks on MACs ?
Is DSS secure?
What is a one-way function ?
What is primality testing ?
What is the quantum cryptography?
What is the legal status of documents signed with digital signatures?
What is authenticated diffie-hellman key agreement?