[Standards] XHTML <img/> presence leak

Ian Paterson ian.paterson at clientside.co.uk
Tue Mar 6 03:19:10 UTC 2007

Peter Saint-Andre wrote:
> Does this text address the concern?
> "Because images served on the Internet may contain malicious 
> instructions or software code and may enable the entity serving the 
> image to determine the network availability of the requesting entity, 
> an implementation MAY choose not to show images but instead show only 
> the 'alt' text or to not fetch images offered by entities that are not 
> authorized to view the user's presence."


- Ian

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