[pmwiki-users] unset password = history gone?

[Russ Fink]

Hello - I observed a behavior, and wondered if this is intentional.  If so, 
Very Cool!  Here is what happened.

I had a password-protected group and a HomePage in that group with some 
phone numbers on it.  I edited the page, erased the phone numbers, clicked 
on save, and then went to the group and set the read-only password to 
"clear."  I left the edit and attr passwords set, however.

I was concerned about people being able to access the freshly deleted phone 
numbers, so I went to the page and selected "history" to see if I could 
recall the sensitive information - but it came up blank.  Hooray!

Tell me, why is this?  Is it a fluke of my setup, intelligent design, or 
because I still had the edit password set on the page?

In general, if I really want to be sure about scrubbing sensitive 
information from history logs, particularly of those pages whose content I 
"declassify," what do I have to do?  I'm only concerned about "normal" 
preventive measures - don't send me tinfoil-hat replies saying I need to 
pulverize my hard drive and launch the pieces into space - I'm mainly 
concerned about "reasonable" precautions.  (And yes, I've heard of the 
wayback machine, but no, I don't think it applies because the site doesn't 
allow spiders and isn't linked to any other page.)

Thanks,
Russ Fink