luibPc eKy fsueIrtcrnartu oeJ dlofrdO E5 7E9 0M 2r0 6a Public Key Infrastructure Joe Oldford EE 579 02 Mar 06 Spartans vs. Persians Overview Introduction Classical (symmetric) Cryptography Public Key (asymmetric) Cryptography Digital Signatures Public Key Infrastructures
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0M 2r0 6a
02 Mar 06
Shared Secret Key
Separate Unrelated Keys
Your encryption algorithm
Your encryption key
Your decryption keyWhat goes public and what doesn’t??
What if I encrypt a message using my secret key??
Could the NSA break them…..
Not quite, how do we ensure:
Need a Public Key Infrastructure
(ITU-T standard X.509)
-user’s public key
-specific use of the public key
-name of the CA
-certificate serial #