Cipher Identifier (online tool) | Boxentriq (2023)

Stuck with a cipher or cryptogram? This tool will help you identify the type of cipher, as well as give you information about possibly useful tools to solve it.

This tool uses AI/Machine Learning technology to recognize over 25 common cipher types and encodings including: Caesar Cipher, Vigenère Cipher (including the autokey variant), Beaufort Cipher (including the autokey variant), Playfair Cipher, Two-Square/Double Playfair Cipher, Columnar Transposition Cipher, Bifid Cipher, Four-Square Cipher, Atbash Cipher, and many more!

You must enter the message.

Note: To get accurate results, your ciphertext should be at least 25 characters long.

Analysis Results

Your ciphertext is likely of this type:

Note: Your ciphertext is less than 25 characters long. Results are less reliable.

For further text analysis and statistics, click here.

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Caesar Cipher

The Caesar cipher, also known as a shift cipher is one of the oldest and most famous ciphers in history. While being deceptively simple, it has been used historically for important secrets and is still popular among puzzlers. In a Caesar cipher, each letter is shifted a fixed number of steps in the alphabet.

  • Caesar Cipher Tool

Monoalphabetic Substitution Cipher

The monoalphabetic substitution cipher is one of the most popular ciphers among puzzle makers. Each letter is substituted by another letter in the alphabet. If it contains word boundaries (spaces and punctuation), it is called an Aristocrat. The more difficult variant, without word boundaries, is called a Patristocrat.

  • Monoalphabetic Substitution Cipher Tool

Atbash Cipher

The Atbash Cipher is a really simple substitution cipher that is sometimes called mirror code. It is believed to be the first cipher ever used. To use Atbash, you simply reverse the alphabet, so A becomes Z, B becomes Y and so on.

  • Atbash Cipher Tool

Vigenère Cipher

The Vigenère cipher was invented in the mid-16th century and has ever since been popular in the cryptography and code-breaking community. Despite being called the Vigenère cipher in honor of Blaise de Vigenère, it was actually developed by Giovan Battista Bellaso. The Vigenère cipher is an improvement of the Caesar cipher, by using a sequence of shifts instead of applying the same shift to every letter.

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A variant of the Vigenère cipher, which uses numbers instead of letters to describe the sequence of shifts, is called a Gronsfeld cipher. Gronsfeld ciphers can be solved as well through the Vigenère tool.

  • Vigenère Cipher Tool

Vigenère Autokey Cipher

The Vigenère Autokey Cipher is a more secure variant of the ordinary Vigenère cipher. It encrypt the first letters in the same way as an ordinary Vigenère cipher, but after all letters in the key have been used it doesn't repeat the sequence. Instead it begins using letters from the plaintext as key.

  • Vigenère Cipher Tool

Beaufort Cipher

The Beaufort Cipher is named after Sir Francis Beaufort. It is similar to the Vigenère cipher, but uses a different "tabula recta". The plaintext letter is subtracted from the key letter instead of adding them. The Beaufort Cipher is reciprocal (the encryption and decryption algorithms are the same).

  • Beaufort Cipher Tool

Beaufort Autokey Cipher

This cipher is similar to the Vigenère Autokey cipher, although it subtracts letters instead of adding them. The Beaufort Autokey Cipher is not reciprocal.

  • Beaufort Cipher Tool

Playfair Cipher

The Playfair cipher was invented in 1854 by Charles Wheatstone, but named after lord Playfair who heavily promoted the use of the cipher. It is a polygraphic substitution cipher, which encrypts pair of letters instead of single letters.

  • Playfair Cipher Tool

Columnar Transposition Cipher

In a columnar transposition cipher, the message is written in a grid of equal length rows, and then read out column by column. The columns are chosen in a scrambled order, decided by the encryption key.

  • Columnar Transposition Cipher Tool

Railfence Cipher

The railfence cipher is a simple form of transposition cipher, where the text is written in a "zig-zag" pattern. It is then read out line by line from the top.

  • Railfence Cipher Tool

Unknown Transposition Cipher

A lot of different transposition cipher variants exists, where the text is written in a particular pattern. Many can be solved manually by paper and pen. One of the more difficult variants is the double transposition cipher, which is equivalent to applying two columnar transposition ciphers.

  • Double Transposition Cipher Tool

Bifid Cipher

The Bifid cipher was invented by the French amateur cryptographer Félix Delastelle around 1901, and is considered an important invention in cryptology. It uses a combination of a Polybius square and transposition of fractionated letters to encrypt messages.

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  • Bifid Cipher Tool

Two-Square Horizontal Cipher

The two-square cipher is also called "double Playfair". It is stronger than an ordinary Playfair cipher, but still easier to use than the four-square cipher. Depending on the orientation of the squares, horizontal or vertical, the cipher behaves slightly different.

Two-Square Vertical Cipher

The two-square cipher is also called "double Playfair". It is stronger than an ordinary Playfair cipher, but still easier to use than the four-square cipher. Depending on the orientation of the squares, horizontal or vertical, the cipher behaves slightly different.

Four-Square Cipher

The four-square-cipher was invented by the French amateur cryptographer Félix Delastelle. It is a digraph cipher, where each pair of letters in the ciphertext depends on a pair of letters in the plaintext. It uses four 5x5 squares to translate each digraph.

  • Four Square Cipher Tool


Base64 is another favorite among puzzle makers. Basically it can be used to encode anything into printable ASCII-characters. Not seldom will the contents need further decoding.

Base64 is easy to recognize. It consists of letters (about 50% uppercase and 50% lowercase), as well as numbers, and often equal-characters (=) at the end.

  • Base64 Decoder Tool

Morse Code

Morse Code is a highly reliable communications method, that can be transmitted in many ways, even during difficult and noisy environments. That makes it especially useful for puzzle games, where it is sometimes not fully obvious that a code is a Morse Code.

Morse Code can be recognized by the typical pattern: small groups of short and long signals. These signals could be actual tones, or other means such as lines, colors, letters or symbols.

  • Morse Code Tool

Hexadecimal Codes

Hexadecimal Codes can represent ASCII, UTF-8, or more advanced encoding schemes. They can also represent the output of Hash functions or modern crypto algorithms like RSA, AES, etc.

Hexadecimal codes only use the digits 0-9 and letters A-F.

  • Use the Hex Analysis Tool to find out more about your hexadecimal codes.

Binary Codes

Binary Codes can represent ASCII, UTF-8, or more advanced encoding schemes. They can also represent the output of Hash functions or modern crypto algorithms like RSA, AES, etc.

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Binary codes only use the digits 0-1.

  • Use the Binary Analysis Tool to find out more about your binary codes.

Octal Codes

Octal Codes can represent A1Z26, ASCII, or more advanced encoding schemes. They can also represent the output of Hash functions or modern crypto algorithms like RSA, AES, etc, even if they usually are presented in hexadecimal or binary format.

Octal codes only use the digits 0-7.

Decimal Codes

Decimal Codes can represent A1Z26, ASCII, or more advanced encoding schemes. They can also represent the output of Hash functions or modern crypto algorithms like RSA, AES, etc, even if they usually are presented in hexadecimal or binary format.

Decimal codes only use the digits 0-9.

  • Use the A1Z26 Tool to convert A1Z26 codes.
  • Use the Ascii Tool to convert Ascii codes.


The ADFGVX cipher was used by the German Army during World War I. It was invented by Lieutenant Fritz Nebel and is a fractionating transposition cipher which combines a Polybius square with a columnar transposition. The name comes from the six possible letters used: A, D, F, G, V and X. It was an enhancement of the earlier ADFGX cipher.

  • ADFGVX Tool
  • ADFGX Tool


Secret messages can be hidden within plaintext, or something that looks like plaintext, using steganography techniques. Some of the most common steganigraphy techniques are the so called NULL cipher and the baconian cipher. Other possibilities are that the text is a riddle or using anagrams.

  • Steganography
  • NULL Cipher
  • Baconian Cipher
  • Anagram Solver

Other Ciphers

To find out more about your cipher, the following tools are recommended:

  • Text Analysis Tool
  • Frequency Analysis Tool

Unknown Format

  • If your cipher consists of lines and dots, it could be a Pigpen Cipher.
  • If your cipher has runes, you could translate them here.
  • If your cipher has hardwritten symbols of men in various positions, it could be a dancing men cipher.
  • If your cipher has combinations of colors, it could be a hexahue code.

See also: Code-Breaking overview | Binary analysis | Frequency analysis | Hex analysis | Text analysis

(Video) Detect the Cipher Type With Artificial Neural Networks (Deep Learning)


How do you identify a cipher? ›

If there are only 2 different symbols, it is likely the cipher is Baconian. If there are 5 or 6 it is probably a polybius square cipher of some sort, or it may be ADFGX or ADFGVX. If there are more than 26 characters it is likely to be a code or nomenclator of some sort or a homophonic substitution cipher.

How do you decode a cipher message? ›

To decode a message, you do the process in reverse. Look at the first letter in the coded message. Find it in the bottom row of your code sheet, then find the letter it corresponds to in the top row of your code sheet and write it above the encoded letter.

How do you find cipher text? ›

ciphertext is calculated from the non-super increasing sequence. If the non-super increasing sequence is {21033, 63094, 16375, 11711, 23422, 58557, 16665, 54322, 64252, 39720, 32718, 63106, 63119, 18753, 21135, 42270} then the ciphertext for the plaintext "QUICK" can be calculated as shown in Table 1 [18].

What is the most common Cypher? ›

In cryptography, a Caesar cipher, also known as Caesar's cipher, the shift cipher, Caesar's code or Caesar shift, is one of the simplest and most widely known encryption techniques.

Is there a cipher app? ›

Cipher is a simple and easy to use App allows you to encrypt and decrypt text. Cipher also includes a keyboard extension that allows you the send encrypted messages to you friends.

What is the hardest cipher to decode? ›

The Voynich Manuscript

Cryptographers still haven't been able to crack the Voynich code, leading some to believe it may be a hoax.

What are the three ways to decode a message? ›

Three positions upon decoding messages
  • Dominant/hegemonic position.
  • Negotiated position.
  • Oppositional position.

How to decrypt online? ›

AES Online Decryption
  1. Select Cipher Mode of Decryption. ECB. CBC.
  2. Enter IV Used During Encryption(Optional)
  3. Key Size in Bits. 128. 192. 256.
  4. Enter Secret Key used for Encryption.
  5. AES Decrypted Output (Base64):

How do I decode encrypted packets? ›

A pre-master secret key is generated by the client and used by the server to derive a master key that encrypts the session traffic.
Using a pre-master secret key to decrypt SSL and TLS
  1. Set an environment variable.
  2. Launch your browser.
  3. Configure Wireshark.
  4. Capture and decrypt the session keys.
Jan 9, 2023

What is cipher secret key? ›

In this cryptography method (also known as symmetric-key cryptography), the single key needed to encrypt and decrypt messages is a shared secret between the communicating parties.

Can you read cipher text? ›

Ciphertext can't be read until it has been converted into plaintext (decrypted) with a key. The decryption cipher is an algorithm that transforms the ciphertext back into plaintext. The term cipher is sometimes used as a synonym for ciphertext. However, it refers to the method of encryption rather than the result.

What is the safest cipher? ›

The Advanced Encryption Standard (AES) is the algorithm trusted as the standard by the U.S. Government and numerous organizations. Although it is highly efficient in 128-bit form, AES also uses keys of 192 and 256 bits for heavy-duty encryption purposes.

What is the easiest cipher to solve? ›

One of the simplest types of encryption is the Shift Cipher. It provides a good introduction to encryption because it is easy to understand. The Shift Cipher is also called the "Caesar Cipher", because Julius Caesar liked to use it for his personal correspondence.

What is the difference between cipher and cypher? ›

'Cipher' was also the original spelling. In my experience and reading, 'cypher' is a variant spelling which appeared at a time when British writers were generally fairly free and easy about changing 'i' to 'y'.

What is the secret app? ›

Through a sequence of tools such as INSPIRATION, STORIES, GRATITUDE, and AFFIRMATIONS, The Secret Super App will give you access to content that will inspire you and uplift you every single day, keeping you focused on your dreams and in the perfect state of mind to attract the life of your dreams.

What is secret code app? ›

Secret Code app allows you to access the Hidden information. Android device have a lots of hidden information of mobile and OS, its seems difficult to find and access.

How do you use a cipher tool? ›

How to Use Cipher.exe
  1. Quit all programs.
  2. Click Start, click Run, and type cmd, and then press ENTER.
  3. Type cipher. /w:'folder', and then press ENTER, where folder is optional and can be any folder in a local volume that you want to clean. For example, the.

What are the top 3 unbroken ciphers? ›

Here are six famous codes and ciphers from across the world that have never been solved.
  • The Voynich Manuscript. The Voynich Manuscript is one of the most mysterious books in the world. ...
  • Kryptos. ...
  • The Dorabella Cipher. ...
  • The Tamam Shud Case. ...
  • The Beale Ciphers. ...
  • The final flight of carrier pigeon NURP 40 TW 194.
Jun 4, 2022

What cipher ends with ==? ›

A Base64 string will end with == if and only if the number of bytes it encodes, mod 3, equals 1. Do you see the pattern? It happens that 16-byte (128-bit) encryption keys are very commonly encoded in Base64, and since 16 mod 3 = 1, their encoding will end with == .

What is the hardest secret code to crack? ›

Here are 5 of the world's hardest codes to crack
  1. Rosetta Stone. The Rosetta Stone dates back to 196 BC, but in the modern day we rediscovered it in 1799 - inscribed in three different scripts, it provided an excellent puzzle for archaeologists. ...
  2. Voynich manuscript. ...
  3. Phaistos Disc. ...
  4. The Shugborough Inscription. ...
  5. Mayan script.
Feb 19, 2016

How do you encoding a message? ›

A simple way to encode a text message is to use the ASCII code of its characters and convert them to octal, hexadecimal or binary format. This method of encoding a text message is simple, straight forward, but in the same time it's quite easy to decode.

How can I learn to decode? ›

Slide beads to practice segmenting

Bead slides are popular decoding strategies because they're easy to make and simple to use. As a student says a word out loud, they slide a bead along for each syllable. This helps them segment words, breaking them down into more manageable parts.

Is it possible to decrypt without the key? ›

The answer to how to decrypt encrypted files without key is you can't. The only proven safe "encryption" is a one-time pad but that's very impractical... I'm going to save you the long, technical story. You have probably heard of some real world encryption algorithms: RSA, AES, RC4, etc.

How can I decrypt data quickly? ›

How to get Decrypted Data in Destiny 2
  1. Complete certain Season of the Splicer storyline quests.
  2. Complete Seasonal Challenges.
  3. Open Conflux Chests in Override (this seasonal activity requires the season pass)
  4. Reach certain levels in the season pass.
Jun 2, 2021

Can hackers decrypt? ›

No, hackers cannot see encrypted data, as it is scrambled and unreadable until the encryption key (or passphrase) is used to decrypt it. However, if a hacker manages to obtain the encryption key or crack the encryption algorithm, then they can gain access to the data.

Is it possible to decrypt encrypted data? ›

Encrypted data can only be read or processed after it has been decrypted, using a decryption key or password. Only the sender and the recipient of the data should have access to the decryption key.

How do I open encrypted device? ›

Turn on device encryption
  1. Sign in to Windows with an administrator account (you may have to sign out and back in to switch accounts). ...
  2. Select the Start button, then select Settings > Update & Security > Device encryption. ...
  3. If device encryption is turned off, select Turn on.

How do you read encrypted data? ›

To open the file or folder encrypted through Windows, a password is needed to decrypt the file. The password is set when the file or folder is encrypted. So, the password needs to be obtained from the person that performed the encryption.

How do you solve a cipher puzzle? ›

In order to solve a cryptogram puzzle, you must crack the code and figure out the hidden message. The code is a simple substitution cipher where each letter in a puzzle (called a cryptoletter) represents a different letter of the alphabet in the solution. This holds true for every instance where a cryptoletter appears.

How are encryption keys hidden? ›

Asymmetric encryption is also called public key encryption, but it actually relies on a key pair. Two mathematically related keys, one called the public key and another called the private key, are generated to be used together. The private key is never shared; it is kept secret and is used only by its owner.

What is anonymous cipher suite? ›

The remote host supports the use of anonymous SSL ciphers. While this enables an administrator to set up a service that encrypts traffic without having to generate and configure SSL certificates, it offers no way to verify the remote host's identity and renders the service vulnerable to a man-in-the-middle attack.

What is Rosicrucian cipher? ›

The Rosicrucian (also known as the Pigpen Cipher) was first published in 1531 by both the Rosicrucian brotherhood and the Freemasons. The cipher uses a geometric simple substitution. First, draw two grids (tic tac toe style) and two Xs. Write each letter of the alphabet in the blank spaces as shown.

What are the types of secret messages? ›

Hidden messages include backwards audio messages, hidden visual messages, and symbolic or cryptic codes such as a crossword or cipher. There are many legitimate examples of hidden messages, though many are imaginings.

Which is the strongest encryption cipher? ›

AES 256-bit encryption is the strongest and most robust encryption standard that is commercially available today.

How do I decode a double cipher? ›

To decrypt a double transposition, construct a block with the right number of rows under the keyword, blocking off the short columns. Write the cipher in by columns, and read it out by rows. Lather, rinse, repeat.

What converts cipher text into plain text? ›

This part of the process is called encryption (sometimes encipherment ). The ciphertext is transmitted to the receiver. The receiver converts the ciphertext message back to its plaintext form. This part of the process is called decryption (sometimes decipherment ).

Are there unbreakable ciphers? ›

There is only one known unbreakable cryptographic system, the one-time pad, which is not generally possible to use because of the difficulties involved in exchanging one-time pads without their being compromised. So any encryption algorithm can be compared to the perfect algorithm, the one-time pad.

Which ciphers should be disabled? ›

You should also disable weak ciphers such as DES and RC4. DES can be broken in a few hours and RC4 has been found to be weaker than previously thought.

What are the four 3 most secured encryption techniques? ›

Best Encryption Algorithms
  • AES. The Advanced Encryption Standard (AES) is the trusted standard algorithm used by the United States government, as well as other organizations. ...
  • Triple DES. ...
  • RSA. ...
  • Blowfish. ...
  • Twofish. ...
  • Rivest-Shamir-Adleman (RSA).
Nov 11, 2022

What is an example of a cipher? ›

For example, "GOOD DOG" can be encrypted as "PLLX XLP" where "L" substitutes for "O", "P" for "G", and "X" for "D" in the message. Transposition of the letters "GOOD DOG" can result in "DGOGDOO". These simple ciphers and examples are easy to crack, even without plaintext-ciphertext pairs.

What cipher uses 3 digit numbers? ›

The Trifid Cipher was created in 1902 by Félix Delastelle. It is simple and complex with how it encodes and decodes a message. The letters of the alphabet are placed in a 3x3x3 randomly along with a “.” for the final spot.

How is cipher chosen? ›

The cipher suites are usually arranged in order of security. The most secure cipher suite naturally becomes the first choice. The server then compares those cipher suites with the cipher suites that are enabled on its side.


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