Steganography에 대해서 알고 계시나요?

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; this is in contrast to cryptography, where the existence of the message itself is not disguised, but the content is obscured.

spammimic은 메시지를 스팸메일로 인코딩해줍니다 허허.. 예를들어 ‘Wow, this is amazing!’은 다음과 같이 인코딩되죠.

Dear Friend ; Your email address has been submitted
to us indicating your interest in our newsletter .
If you no longer wish to receive our publications simply
reply with a Subject: of “REMOVE” and you will immediately
be removed from our mailing list . This mail is being
sent in compliance with Senate bill 2216 , Title 4
; Section 305 ! This is different than anything else
you’ve seen . Why work for somebody else when you can
become rich within 58 MONTHS . Have you ever noticed
people love convenience plus people will do almost
anything to avoid mailing their bills . Well, now is
your chance to capitalize on this . We will help you
decrease perceived waiting time by 130% and process
your orders within seconds . You can begin at absolutely
no cost to you . But don’t believe us ! Mr Simpson
who resides in Delaware tried us and says “I was skeptical
but it worked for me” ! We are a BBB member in good
standing ! You will blame yourself forever if you don’t
order now ! Sign up a friend and your friend will be
rich too . God Bless ! Dear Cybercitizen ; You made
the right decision when you signed up for our mailing
list ! If you no longer wish to receive our publications
simply reply with a Subject: of “REMOVE” and you will
immediately be removed from our mailing list ! This
mail is being sent in compliance with Senate bill 1618
; Title 3 , Section 309 ! THIS IS NOT MULTI-LEVEL MARKETING
! Why work for somebody else when you can become rich
as few as 54 DAYS ! Have you ever noticed more people
than ever are surfing the web and how long the line-ups
are at bank machines . Well, now is your chance to
capitalize on this . WE will help YOU increase customer
response by 150% plus use credit cards on your website
! You are guaranteed to succeed because we take all
the risk . But don’t believe us . Mr Jones of Georgia
tried us and says “Now I’m rich many more things are
possible” ! This offer is 100% legal ! So make yourself
rich now by ordering immediately ! Sign up a friend
and you’ll get a discount of 60% . Best regards !

놀라울 따름;;; Steganography는 여기에서 그 발음을 찾아볼 수 있습니다. Embedding Covert Channel into TCP/IP이후로 인상적입니다.