This topic has come up a lot. Despite quite a bit of searching to research your question, I was unable to find a firm answer in an official Lotus publication. The best answer I could find, based on discussion at www.notes.net, is 64-bit RC4. Many people seemed to agree that this is the algorithm used. But I cannot promise that it is correct. Note that port encryption for Notes clients is different from securebrowser sessions with a Domino web server. The latter uses SSL.
Related Q&A from Chuck Connell
Is it possible to encrypt a user's name before sending an email? SearchDomino.com expert Chuck Connell weighs in.continue reading
Learn how to change authentication timeout interval for Domino Web Access logins.continue reading
SearchDomino.com expert Chuck Connell provides a resource for a Lotus Notes administrator who wants to filter out email containing the word "spam," ...continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.