http://cacr.uwaterloo.ca/techreports/2014/cacr2014-10.pdf
This is apparently by the same people who came up with OTR. An interesting read (although a lot goes over my head 
).
http://cacr.uwaterloo.ca/techreports/2014/cacr2014-10.pdf
This is apparently by the same people who came up with OTR. An interesting read (although a lot goes over my head ).