The message is copied into the rows of such a table, where the Xs would be, skipping over the blanks. Numbers were sent by a numbers shift, followed by the actual plaintext digits in repeated pairs, followed by another shift. Ask Question Asked 4 years, 1 month ago. [1] The ultimate development along these lines was the VIC cipher, used in the 1950s by Reino Häyhänen. Above these letters are written the 10 digits of C (from the Intermediate Keys section above).

( It is of interest because it seems highly secure, despite being a pencil-and-paper cipher. So, if you can remember those three This grid makes it possible to generate associations between numbers (coordinate line, column) and characters, these associations are used for the encryption and the decryption. If the cipher were to be given a modern technical name, it would be known as a "straddling bipartite monoalphabetic substitution superenciphered by modified double transposition." Construct and apply the second (disrupted) transposition table in reverse. ) , 0 is N. 2 is a row heading, so we move to 20 which is G. Continuing in this way, we reveal the original message: The question mark at the end is from the final 4. The result is T. Use chain addition to expand T by 50 digits. Hill Cipher. The knowledge of the grid is almost indispensable, the number of grid possibilities is of the order of 10^30. ) The VIC cipher is regarded as the most complex modification of the Nihilist cipher family. Type text to be encoded/decoded by substitution cipher: Result. By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. Start with 1 and label letters/numbers in alphabetical/numeric order.

In a way, the VIC is a collection of Note: this section tracks the calculations by referring to [Line-X] or similar. because your message already fit into groups of five perfectly. Thus, we conclude that this is a null, and discard it. It needs to be between 0 and 16. If you want to know all about this amazing feat of code-making, here’s e 0.12702 t 0.09056 a 0.08167 o 0.07507 i 0.06966 n 0.06749 s 0.06327 h 0.06094 r 0.05987 d 0.04253 l 0.04025 c 0.02782 u 0.02758 m 0.02406 w 0.02360 Podcast 285: Turning your coding career into an RPG, Creating new Help Center documents for Review queues: Project overview, Feature Preview: New Review Suspensions Mod UX, Language of the month for November 2020: Forth, Bacon's cipher: An Intro to Steganography. The key (header row) for the checkerboard is based on [Line-S]. Vic encryption starts with the creation of a grid called Straddling Checkerboard generated from a deranged alphabet (see below on how to create it), Example: The following grid (with the numbers 2 and 6 and an upside-down deranged alphabet complemented by . The message is then transposed via Diagonal Transposition keyed by [Line-R] above. There is nothing concealed that will not be disclosed. Hash Generator. ) The top line of letters in the checkerboard is given as a part of the key; here I use the Russian word СНЕГОПАД and English phrase "A SIN TO ERR". With 110 digits and 12 columns, we have 9 full rows and 2 digits in a final row.

Sequentialize the first 19 digits to get the key for the first transposition (K1), and the following 20 for the key for the second (K2).

A very strong version was used by Max Clausen in Richard Sorge's network in Japan, and by Alexander Foote in the Lucy spy ring in Switzerland. Here is an example of width eight, with irrelevant information masked out: Notice the leftmost part of the first triangular blank (A) begins below "1" in the key, diminishing by one digit per line until the fifth line, which contains no blanks.

…Please make sure to answer the question and provide sufficient detail. The Vic cipher being of Russian origin, it is often associated with the nihilist cipher of which it is itself considered as a variant. Odd Bits . Our message is 130 digits, so we're okay. some extra characters at the end. Split the first 20 letters of the key phrase into two groups of 10 and sequentialize each individually, which we will call S1 and S2. As this is a row heading, there should be another number after this, but this is end of the message. You've received a coded message from your ally that you know is encoded with the VIC cipher. Example: The key 314 was used, the result of the subtraction is then 40247328417 via the calculation: Transcribe the numeric code into letters via the grid using the coordinates (line, column) to get the plain message. A message encrypted by Vic is either numeric or alphabetic (+ the two characters . For example: Chain Addition is akin to a Linear-feedback shift register, whereby a stream of number is generated as an output (and fed back in as an input) to a seed number. Should be fixed now. One should add one by one all digits of the changing message to all digits of the secret sequence. It’s just there so our numeric code is always

It was arguably the most complex hand-operated cipher ever seen, when it was first discovered. After the X spots are all filled, return to the top and copy the rest of the message into the rows of blanks. Construct and apply the first transposition table in reverse. The example below uses the English mnemonic 'AT ONE SIR', however the Cyrillic mnemonic used by Hayhanen was 'snegopad', the Russian word for snowfall. Cool, right? I filled the container with Xmas goodies, but they all got taken when the cache went missing

rich. Enigma. Awesome work.

The disruption pattern is determined by the width of the table and the key.



The VIC cipher is one of the most complicated pencil and paper ciphers ever devised. For instance, answers to code-golf challenges should attempt to be as short as possible.