1. HIDING IN PLAIN SIGHT A QUICK INTRO TO STEGANOGRAPHY
Micah Fogel

2. Read the hidden messsage:
WhEn in the course of human events, it becomes necessary for one peopLe to dissolve the politiCal bands which have cOnnected theM with anothEr, and TO assume among the powers of the earth, the separate and equal statIon to which the laws of nature and of nature's god entitle theM, a decent reSpect to the opinions of mAnkind require...

3. Welcome To IMSA!
Of course, most messages won’t be so easy to spot—that’s the goal!
Steganos is Greek for “hidden” or “covered”
Similar to cryptography (from kruptos “secret”)
The difference is that steganography seeks to hide even the existence of a message from those other than the intended recipient
Both could be used together

4. Find the hidden message:
We believe each person learning the language of science can participate in or, at the least, think about essential societal decisions.

5. Well spotted!
We believe each person learning the language of science can participate in or, at the least, think about essential societal decisions.

6. Can you see this message?

7. Compare to the original

8. _ _ _ _ _ . _ = MORSE

9. Hear the hidden message?

10. Compare to the original sound

11. Can you see the hidden image?

12. Compare to the original

13. History Herodotus mentions two methods:
Under a wax tablet
Tattoo on scalp
Johanes Trimethius invented the “ave maria cipher”
A modern variation is “SpamMimic”
Invisible inks

14. History Riverbank Laboratories, Shakespeare, and Bacon
Microdots in WWII
Atlas and map makers
Digital watermarks

15. Some local color Col. George Fabyan founded Riverbank Laboratories
Interest in codes and ciphers
Elizabeth Wells Gallup
Bacon’s biliteral cipher
Elizabeth and William Friedman

16. Bacon’s biliteral cipher=
aaaaa H
aabbb O
abbba V
babab B
aaaab I
abaaa P
abbbb W
babba C
aaaba J
abaab Q
baaaa X
babbb D
aaabb K
ababa R
baaab Y
bbaaa E
aabaa L
ababb S
baaba Z
bbaab F
aabab M
abbaa T
baabb G
aabba N
abbab U
babaa

17. Message hidden using Bacon
To be, or not to be—that is the question. Whether ‘tis nobler in the mind…

18. Message hidden using Bacon
To be, or not to be—that is the question. Whether ‘tis nobler in the mind…