Notes in Comput. Even if the recipients of those documents have no idea what content to expect, all subsequent communication would either give away the ruse or need to be intercepted and modified as well. Fearing that the position of the hands of the watches could be spelling out a secret message, they changed the position of the hands. Encrypting the compressed message before hiding is recommended and provides double protection. The field of steganography is very old.
Microdots are blocks of text or images scaled down to the size of a regular dot in a text.
Shifting words and changing spacing between lines in text documents or in images containing text can also be used for hiding bits of secret messages. No context found. No context found. 1174 of Lecture Notes in Computer Science, pp.