1997-01-17 paulson 1997-01-17 Now with Andy Gordon's treatment of freshness to replace newN/K
1997-01-07 paulson 1997-01-07 Simplification of some proofs, especially by eliminating the equality in RA2
1997-01-07 paulson 1997-01-07 Now uses HPair
1996-12-19 paulson 1996-12-19 Extensive tidying and simplification, largely stemming from changing newN and newK to take an integer argument
1996-12-18 paulson 1996-12-18 Recursive Authentication Protocol