wM TS has come back by saying “You will not be able to use the same cryptix jar on both 6.0 and 6.1/6.5. IS 6.1/6.5 requires the use of signed security libraries. There should be one on the Cryptix site.”
Unfortunately, Cryptix V3 is no longer maintained. Looks like I have to look at other alternatives such as Bouncy Castle. Appreciate it if anyone has other suggestions.