Comparative remailer mix neworks, onion routing and pEp

This is not an exhautive comparative and might not be accurate.

It is base on the pages:

• Type I (Cypherpunks)

• Type II Mixmaster

• Type III Mixminion

• Onion routing

• Proposal 1 (P1) design

	Remailer	Mixnetwor ks		Onion Routing	pEp MixMailer
	Type I/Cypherp unks	Type II/Mixmas ter	Type III/Mixmi nion	Tor
transport	SMTP	SMTP	TLS + SMTP?	TLS	SMTP?
nodes key	NA	yes	yes	yes	yes (OpenPGP) ?
key rotation	NA	no	yes	yes	active/pa sive
nodes/key discovery	manual	pinger?	directory	dirauths	GNS?
types of nodes	NA	same?	several?	“G,M,E”	same?
packet format	?	?	Sphinx	specific	?
packet size	different	same?	same	same	different in future?
packet mixing	NA	yes	yes	no	yes in future?
cover traffic	NA	yes	yes?	no	?
directory server	no	no	central	decentral ized	GNS/trust ed nodes?
reply	no	no	SURB	“yes, circuit”	NA
spam	yes	yes	yes	NA	?
network diversity	no	no	no	yes	?
user friendly	no	no	no	yes	?
old crypto	yes	yes	yes	no	?