There are no punctuation marks in the telegram, so your teacher may need to help you in clarifying the message. As you locate each letter in the grid, you should write that letter above the pair of code letters to which it corresponds. The changes to the file should be invisible to any casual observer. Pictures and videos sent using SendBig have the same quality as the original ones, without reducing their quality. This form uses steganography techniques to hide a secret message (or even another file) in a JPEG image, or a WAV or AU audio file. com which allows you to send Unlimited pictures and files through email and completely Free. Some letter pairs will carry over from one line to the next. Answer (1 of 18): The best way is to use SendBig. The code letters are arbitrarily arranged in groups of five letters. To decode the fictitious message in the cryptogram, begin by grouping each set of two letters starting with the first two letters (FG) and continuing through the message. Trace them across the grid to their intersection at the letter 'A' in the plaintext. For example, if 'DG' were the first two letters to decipher in a cryptogram, you would find the letter 'D' on the vertical axis and the letter 'G' on the horizontal axis.

The first letter in the message is from the vertical axis of the grid, and the second letter is from its horizontal axis. Each letter in the grid is replaced by two letters in the coded message. In this code system, each letter of the alphabet and each of the numbers from 1 to 9 appears in the matrix of the grid. In substitution codes, the letters of the plaintext (message to be put into secret form) are replaced by other letters, numbers, or symbols. To extend the activity, ask students to write a message using the code, and then exchange the messages for decoding. It supports learning about the Zimmermann Telegram. In this exercise, students decode a fictitious message using a simple substitution code.

How to encode a message i a picture