Firewall Wizards mailing list archives
Re: Screening Outgoing Mail for Content
From: Thomas Schiavinato <tschiavi () advsys com>
Date: Wed, 5 Aug 1998 11:26:07 -0400 (EDT)
According to Perry E. Metzger:
Users smart enough to use a scanner can send out GIF's of sensitive documents without you being able to detect it via automation.
"Sufficiently determined" detectors can decode common graphic formats and pump them through OCR software. Even designs typically have textual labels you can key on. However, you are right. "Smart" users can employ steganographic techniques to hide data in the images. Regards, Tom -- Tom Schiavinato Advanced Systems Consulting Inc. Senior Systems Consultant Marlton, N.J.
Current thread:
- Screening Outgoing Mail for Content Bruce B. Platt (Aug 04)
- Re: Screening Outgoing Mail for Content Marcus J. Ranum (Aug 04)
- Re: Screening Outgoing Mail for Content Perry E. Metzger (Aug 05)
- Re: Screening Outgoing Mail for Content Thomas Schiavinato (Aug 05)
- Re: Screening Outgoing Mail for Content6 Chad Schieken (Aug 05)
- Re: Screening Outgoing Mail for Content6 Joseph S. D. Yao (Aug 06)
- Re: Screening Outgoing Mail for Content Thomas Schiavinato (Aug 05)
- Re: Screening Outgoing Mail for Content Wilson Roberto Afonso (Aug 05)
- Re: Screening Outgoing Mail for Content Joseph S. D. Yao (Aug 05)
- Re: Screening Outgoing Mail for Content and other things cfb (Aug 06)
- Re: Screening Outgoing Mail for Content Perry E. Metzger (Aug 05)
- Re: Screening Outgoing Mail for Content Ted Doty (Aug 05)