Difficult:
I would like some clarification on the RSA blind signature method. I'm not exactly sure why the random number k is important in the process. I'm also not sure why talked about birthday attacks on signatures when it still seems fairly difficult and easily defeated.
Reflective:
I think it's interesting how signatures could be created from pretty much any encryption method that uses public key cryptography. Essentially it seems that it's just the signing with the private key and then verifying the signature with the public key. Since only one person has the private key we can verify it came from them.
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