How can signatures remain valid beyond the expiration dates of their keys, or, How do you verify a 20-year-old signature?
TCS,
846Post New Cryptography General Questions
What is a CSU, or, How do certifying authorities store their private keys?
What is authenticated diffie-hellman key agreement?
What is SET ?
Can users of rsa run out of distinct primes?
What is shamirs secret sharing scheme?
What is DNA computing ?
What is primality testing ?
What is a digital time-stamping service?
Which cryptographic mechanism provides non-repudiation?
What role does the NSA play in commercial cryptography?
What is SHS?
Are elliptic curve cryptosystems widely used ?
Who needs a key?
What are some other hard problems ?
What other stream ciphers are there?