We only do those if specifically requested anymore because it is problematic to make one and get it through the email system. When we were back in the paper days sending the original field sheets, the diagram was on the sheet. But now all info is entered in to a process that checks for consistency errors and then produces a report, and photos are attached as.
Steganography has been widely used for centuries. Here are some examples: This particular form of steganography is called a null cipher. Messages written in Morse code on yarn and then knitted into a piece of clothing worn by a courier.
Messages written on envelopes in the area covered by postage stamps. In the early days of the printing press, it was common to mix different typefaces on a printed page because the printer did not have enough copies of some letters in one typeface.
Thus, a message could be hidden by using two or more different typefaces, such as normal or italic. During and after World War II, espionage agents used photographically-produced microdots to send information back and forth.
Microdots were typically minute less than the size of the period produced by a typewriter.
World War II microdots were embedded in the paper and covered with an adhesive, such as collodion. That was reflective and so was detectable by viewing against glancing light. Alternative techniques included inserting microdots into slits cut into the edge of postcards.
She was a dealer in dollsand her letters discussed the quantity and type of doll to ship. The stegotext was the doll orders, and the concealed "plaintext" was itself encoded and gave information about ship movements, etc.
Her case became somewhat famous and she became known as the Doll Woman. During World War II, photosensitive glass was declared secret, and used for transmitting information to Allied armies.
Jeremiah Denton repeatedly blinked his eyes in Morse code during the televised press conference that he was forced into as an American prisoner-of-war by his North Vietnamese captors, spelling out "T-O-R-T-U-R-E".
Increw members of the USS Pueblo intelligence ship, held as prisoners by North Koreacommunicated in sign language during staged photo opportunities, to inform the United States that they were not defectors but captives of the North Koreans.
In other photos presented to the US, crew members gave " the finger " to the unsuspecting North Koreans, in an attempt to discredit photos that showed them smiling and comfortable.
Digital messages[ edit ] Image of a tree with a steganographically hidden image. The hidden image is revealed by removing all but the two least significant bits of each color component and a subsequent normalization. The hidden image is shown below.Things to Write Journal This collection of outrageous and witty writing prompts will get the creative juices flowing in no time.
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Steganography (/ ˌ s t ɛ ɡ ə ˈ n ɒ ɡ r ə f i / () STEG-ə-NOG-rə-fee) is the practice of concealing a file, message, image, or video within another file, message, image, or ashio-midori.com word steganography combines the Greek words steganos (στεγανός), meaning "covered, concealed, or protected", and graphein (γράφειν) meaning "writing"..
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