10 Info Hiding Tpes and Applications

Prévia do material em texto

Prof. Dr. Anderson Rocha
anderson.rocha@ic.unicamp.br
http://www.ic.unicamp.br/~rocha
Reasoning for Complex Data (RECOD) Lab.
Institute of Computing, Unicamp
Av. Albert Einstein, 1251 - Cidade Universitária
CEP 13083-970 • Campinas/SP - Brasil 
Análise Forense de
Documentos Digitais
Organização
A. Rocha, 2012 – Análise Forense de Documentos Digitais
Avisos
‣ Aulas
• Slides em Inglês
• Apresentados previamente no IEEE CVPR 
Workshop on Vision of the Unseen (WVU), 
2008, Anchorage, Alaska
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Organização
‣ Mascaramento de Informações (Information 
Hiding)
‣ Esteganografia & Esteganálise (Steganography & 
Steganalysis)
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Information Hiding: 
types and applications
Institute of Computing
University of Campinas (Unicamp)
CEP 13084-851, Campinas, SP - Brazil
Anderson Rocha
anderson.rocha@ic.unicamp.br
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
‣ Introduction
‣ Terminology
‣ Historical remarks
‣ Social Impacts
‣ Scientific and commercial applications
Summary
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Introduction
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Introduction
‣ What is Information Hiding?
‣ Common use:
• Captioning
• Time-stamping & Tamper-proofing
• Watermarking
• Communications
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Terminology
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Terminology
‣ Information Hiding
‣ Cover object
‣ Stego object
‣ Stego key
‣ Attack
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Terminology
Capacity
Security Robustness
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Terminology
A data hiding example
Message to be hidden
The cover image
The produce stego image
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Terminology
Information Hiding
Covert channels Steganography Anonymity Copyright marking
Linguistic Technical Robust Fragile
Fingerprinting Watermarking
Perceptible Imperceptible
Information Hiding hierarchy
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Historical 
Remarks
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Historical remarks
‣ Harpagus and the hare
‣ Histaieus and his slave
‣ Demeratus and the 
wax tablets
‣ Drawings concealing 
information
Mona Lisa by Da Vinci
Creation of Adam by Michelangelo
Expulsion of Heliodorus from 
the Temple by Raphael
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Historical remarks
‣ Sympathetic inks
‣ Micro-dots technology
‣ Null-cyphers
‣ Hypteronomachia Poliphili
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Applications
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Advanced data structures
Scientific and commercial applications
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Medical Imagery
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Strong watermarks
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Military agencies
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Computer Forensics
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Document tracking and authentication
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
People communication
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A. Rocha, 2012 – Análise Forense de Documentos Digitais
Scientific and commercial applications
Transit radar systems
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Obrigado!