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Re: Image encryption

  • Subject: Re: Image encryption
  • From: Roy Schestowitz <newsgroups@schestowitz.com>
  • Date: Wed, 15 Jun 2005 05:16:53 +0100
  • Newsgroups: sci.image.processing
  • References: <42af0fa9$0$3144$8fcfb975@news.wanadoo.fr> <1118802493.196273.189490@g44g2000cwa.googlegroups.com>
  • User-agent: KNode/0.7.2

> I have to send images by E-Mail. What is the best algorithm to encrypt 
> them ? I am searching for the corresponding source code.


> PGP/GnuPG public key encryption
> Zip with encryption
> for (i=0; i < num_pixels; i++) {
>   image[i] = image[i]>>7*rand();
> }
> Should encrypt them pretty well.
> Your question is vague.  It's like asking "I need to paint my house,
> what paint should I buy".  There are an infinite number of possible
> answers.. I could tell you to go and but a particular mix colour from a
> particular company at a certain store in a certain sized can but it
> probably wouldn't do what you wanted...
> In the future refer to
> http://www.catb.org/~esr/faqs/smart-questions.html :)

What is more deceiving is the purpose, which is unclear. If you want to send
images, why would you need to know the algorithm? Are you building a mail
client or encryption package for a mail client?

You can use PGP < http://www.pgpi.org/ > in your mail application or encrypt
just the file using PGP and then send an unencrypted E-mail message which
contains the file.


Roy S. Schestowitz

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