Cryptography and Steganography with watermarking
- 2. Evolution Cryptography Watermarking Steganography
- 3. Cryptography Cryptography derived its name from a Greek word called “Kryptos” which means “Hidden Secrets”. Cryptography is the practice and study of hiding information. It is the Art or Science of converting a plain text into a data which can’t be understood and again retransforming that message into its original form. It provides Confidentiality, Integrity, Accuracy.
- 4. Symmetric Cryptography Asymmetric Cryptography
- 5. Steganography Greek Words : STEGANOS – “Covered” GRAPHIA – “Writing” Steganography is the art and science of writing hidden messages in such a way that no one apart from the intended recipient knows of the existence of the message. Stegosaurus: a covered lizard
- 6. Types of Steganography Text audio image video protocol
- 7. Image steganography algorithm LSB - Example A sample raster data for 3 pixels (9 bytes) may be: Inserting the binary value for A (10000001) changes 4 bits 00100111 11101001 11001000 00100111 11001000 11101001 11001000 00100111 11101011 00100111 11101000 11001000 00100110 11001000 11101000 11001001 00100111 11101011
- 8. LSB - Uses Storing passwords and/or other confidential information Covert communication of sensitive data Speculated uses in terrorist activities Being widely used to hide and/or transfer illegal content
- 10. Watermarking A watermark is a recognizable image or pattern in paper that appears as various shades of lightness/darkness when viewed by transmitted light (or when viewed by reflected light, a top a dark background), caused by thickness variations in the paper.
- 11. Digital Watermarking A digital watermark is a digital signal or pattern inserted into a digital document such as text, graphics or multimedia, and carries information unique to the copyright owner, the creator of the document or the authorized consumer. VISIBLE WATERMARKING INVISIBLE WATERMARKING
- 13. EXAMPLE OF INVISIBLE WATERMARKING
- 14. EXAMPLE OF VISIBLE WATERMARKING + =
- 15. UV Watermarking
- 16. APPLICATION FIELD FOR WATERMARKING INTERNET TV IIII INTERNET RADIO E-Book INTERNET NEWSPAPER EDUCATION MATERIAL INTERNET MAGZINE DOCUMENTS CERTIFICATES AUDIO TEXT IMAGE VIDEO GRAPHICS WATERMARKING TECHNOLOGY
- 17. Watermarking Vs. Steganography Goal of Steganography Intruder Cannot detect message Primarily 1:1 communication Goal of Watermarking Intruder cannot remove or replace the message Primarily 1: many communication
- 18. Cryptography vs. Steganography Cryptography: although encypted and unreadable, the existence of data is not hidden WHEREAS Steganography: no knowledge of the existence of the data
- 19. REFERENCES http://www.garykessler.net/library/steganography.html http://www.fbi.gov/about-us/lab/forensic-sciencecommunications/ fsc/july2004/research/2004_03_research01.htm http://stegano.net/tutorial/steg-history.html http://www.strangehorizons.com/2001/20011008/steganography.shtml
- 20. QUERIES ?
- 21. “For every lock there is a Key… It is better to KEEP SAFE YOUR LOCK THAN THE KEY”