Very nice. Very timely.
If it is possible and not a big task, I would like to suggest the following:
- A user cp option (checkbox) permitting the member to enable/disable this function;
- A message level option (checkbox) permitting the member to elect this option on a message by message basis;
- Admin level options enabling or disabling each of the above;
Why? As pointed out, there is a degree of risk in using the encryption mod, i.e. if the mod is for whatever reason disabled, removed, broken, whatever - encrypted PMs are effectively lost. Therefore, I would like to put the burden of responsibility for using encryption at the member level. Inform them of the trade-offs and that they use at their option and own risk.
Thanks for the work you have done on this. Installed.