Invisible ink - Wikipedia
WEBInvisible ink, also known as security ink or sympathetic ink, is a substance used for writing, which is invisible either on application or soon thereafter, and can later be made visible by some means, such as heat or ultraviolet light.
Secret Writing | Encyclopedia.com
WEBMay 29, 2018 · Secret writing is any means of written communication whereby a spy conceals the actual written text, whether it is enciphered/encoded or not.
The Codebreakers - Wikipedia
WEBThe Codebreakers – The Story of Secret Writing (ISBN 0-684-83130-9) is a book by David Kahn, published in 1967, comprehensively chronicling the history of cryptography from ancient Egypt to the time of its writing.
Revealing all: A history of secret writing | New Scientist
WEBBy Caroline Morley. 9 July 2014. New York, 1942: checking mail for anything that might aid the enemy (Image: Bettmann/Corbis) A history of secret messages that runs from lemon juice to codes in...
Steganography - Wikipedia
WEBSteganography ( / ˌstɛɡəˈnɒɡrəfi / ⓘ STEG-ə-NOG-rə-fee) is the practice of representing information within another message or physical object, in such a manner that the presence of the information is not evident to human inspection.
Cryptography/Introduction - Wikibooks, open books for an open …
WEBFeb 13, 2023 · The secret knowledge is commonly called the key, though the secret knowledge may include the entire process or algorithm that is used in the encryption/decryption. The information in its useful form is called plaintext (or cleartext); in its encrypted form it is called ciphertext.
After 200 years, a glimpse into The Art of Secret Writing
WEBJun 14, 2011 · Secret writing is a simple method of writing in code. A skilled individual, using this technique, would create what appeared to be an unexceptional document. However, that document might well contain a secret message.
The ancient art of hidden writing - BBC News
WEBJul 2, 2010 · The ancient art of hidden writing. 2 July 2010. Trithemius wrote a long text about the art of hiding messages in text. By Mark Ward. Technology correspondent, BBC News. The arrest of 10 alleged...
The Spymaster's Toolkit - CIA
WEBSecret Writing. Revolutionary War: American agents serving abroad composed their intelligence reports using invisible ink. George Washington believed this would “not only render his communications less exposed to detection, but relieve the fears of such persons as may be entrusted in its conveyance.”
Deeper meaning: Ciphers reveal more than hidden messages
WEBMar 13, 2024 · An expert in the history of secret writing, Dr. Katherine Ellison unlocks literary history by deciphering the messages hidden in encrypted writing.
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