On 07.01.2010 12:50, Gregory Biasky wrote:
> Hello. How you can encrypt a message using as a container HTML file,
> that is, the message must be recorded in the gaps that HTML ignores.

HTML has no "gaps", in the sense that content is ignored.

The only way to transfer a cyphertext in HTML would be the <meta /> tag, 
which is ignored if a *browser*, or rather HTML rendering engine, cannot 
make sense of it (it's still available if you look in the HTML source).

Content in the <body /> is displayed as best as possible by the 
rendering engine.

This is, however, not cryptography, but a very poor man's steganography, 
in the first place.

This is probably better placed on the security-basics mailing list[0], 
rather than ruby-talk, too.

[0] http://www.securityfocus.com/archive/105/description

--
Phillip Gawlowski