[Macpartners] [csail-related] Color Laser Printer Advice (Ricoh SP-C430dn?)

[David M. Templeton]

http://en.m.wikipedia.org/wiki/Printer_steganography

Yup, the dots typically encode a timestamp and the printer serial number, ostensibly to prevent currency counterfitting. You can see the dots with a loupe.

-Dave
(Sent via mobile)

On Sep 29, 2011, at 6:49, Richard Stallman <rms at gnu.org> wrote:

> According to the EFF, color laser printers write hard-to-see dots that
> identify what printer a document was made on.  This is a malicious
> surveillance feature.
> 
> I heard at one point that there are ink jet color printers which don't
> do this.  They might have somewhat less quality, but maybe they would
> still be good enough for most of our use.  I'm not sure of this, and
> if it was true, it may not be true now.  But could we please study and
> consider this option?  These printers might also be a lot cheaper.
> 
> -- 
> Dr Richard Stallman
> President, Free Software Foundation
> 51 Franklin St
> Boston MA 02110
> USA
> www.fsf.org  www.gnu.org
> Skype: No way! That's nonfree (freedom-denying) software.
>  Use free telephony http://directory.fsf.org/category/tel/
> 
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