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Asymmetric cryptography, or public-key cryptography, is the foundation of security protocols that do not require shared secrets.

5
votes
I think if you continue down this line of thinking you will end up inventing Certificate Authorities. Yes, any key should be able to revoke itself (ie sign a message saying "Don't trust any future me …
answered Aug 23 '16 by Mike Ounsworth
4
votes
Why do apps encourage you to use separate key-pairs for encryption and for signing? You are correct that there is no technical reason why you can't use one RSA key-pair for both encryption/decryption …
answered Jul 7 '15 by Mike Ounsworth
2
votes
As pointed out by @王庭茂 and @LieRyan, you need some way to prove that the public key that gets uploaded with the license file actually came from your company and wasn't planted there by an attacker (in …
answered Jan 29 '16 by Mike Ounsworth
6
votes
On first inspection, I don't see anything egregiously wrong with your scheme, however I question why it's necessary and whether it's actually adding any value. To summarize @schroeder and @Nat's comm …
answered Jan 27 by Mike Ounsworth
4
votes
This in an interesting problem; with only symmetric encryption, how do you secure a communication channel (ensuring both privacy and authentication)? Researchers have been working on the problem for c …
answered May 15 '15 by Mike Ounsworth
4
votes
which is harder: finding the private key from the public key, or decrypting the 40 character string? How different would this be if the SSH key were 4096 bits? I believe you are asking the wrong …
answered Feb 13 '18 by Mike Ounsworth