The plaintext and options file for this are no longer on my computer system.

Perhaps my inability to figure out how one would decrypt Yull-encrypted files without all the parameters only shows my ignorance of cryptography. Perhaps but maybe perhaps not.

With Yull I have strived to make it easy to protect your data and nearly impossible (really, I believe impossible but I can't say that) for an adversary to retrieve it without your cooperation.

I think I have succeeded, but of course, I cannot prove a negative.

You can read the White Paper here on the web site to learn how Yull works. Perhaps that's some help.

PROVE ME WRONG! SHOW ME YULL IS A FAILURE!

I will answer questions (if they are useful for the rest of the community) about these files.