how to make the contents of a file disappear after x numbers of days or at date

[Alan Pope]

On 10 Sep 2010, at 06:49, user1 <bqz69 at telia.com> wrote:

>> You're basically describing DRM, nothing more.
> 
> I was meaning text, html and jpeg files and NOT pdf files
> 

That was just an example to illustrate my point. The fact remains what you're describing is DRM. So you'd really need to wrap the files up in some other  format to enforce this.

Al.