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Steganography app for mac5/26/2023 ![]() After entering a small amount of text - like an SMS message - any change, such as a spelling correction, caused the text box to float down (or up) and it became difficult to enter more. After selecting a picture and entering a password, I typed a message. The encryption section on the iPhone offers two sources: camera or library. There is also a version of this for OS X: StegoSecOsX ( ). It is no use encrypting images unless someone else can read the message. After its eerie opening screen, we are shown a panel for decryption. The iPhone app, StegoSec, is a $1.99 (65 baht) download. These hide data inside the file and should not be confused with watermarking, although there may be some similarities. I have downloaded six applications that can run on OS X, plus one for the iPhone. I am teaching a course in which some knowledge of such techniques appears. Several of the allegations involved "dead drops", personal Wi-Fi networks (so easy to do these days), and the use of steganography. The subject has recently come to the fore with the arrest in New York of several persons who had been spying for Russia. These were not just encryption of the type used in Enigma, nor the type developed into programs like PGP (Pretty Good Privacy), but a method to hide text inside images: Steganography, or hidden writing. During investigations, it was suggested that some of the communications were using secret codes. The destruction of the World Trade Center in New York is an event that continues to have repercussions today.
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