The main thing we didn't cover yesterday:
	How do we deliver the key?

Let's look at xor a minute:
	Since it's pretty central
	Does it matter what order we de-xor in?

Three-pass protocol
	I learned it under the name "Triple padlock exchange"
	Let's try with xor
	But what could Eve or Trudy do?
	There IS a way to make this work, but it's not common

RSA:
	Go through example

Now that that works:
	Cryptographic identity verification
		For login (ssh, etc)

One more idea before certificates:
	Cryptographic hash functions
	A little fancier than hash table functions
		Can run slower

Certificates and signing
	And SSH key validation
	Isoptera has a signed certificate for https, but not ssh
		Might work, though