Cryptography

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Number Bases Converters and Translators

• Base64 Converter
• Hex to ASCII Converter
• Octal to Text Converter

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Cipher Identification and Decryption Tools

dCode

dCode.fr is a collection of hundreds of tools to help solve ciphers, codes, puzzles, etc. Check out the online dCode Cipher Identifier if you’re not sure how a message is encrypted. Or check out the list of all available dCode tools.

Commonly used dCode cipher tools:

• Caesar Cipher
  • Substitution cipher: letters in the alphabet are shifted by some fixed number of spaces to yield an encoding alphabet.
• Morse Code Translator
  • Encodes text characters as sequences of two different signal durations, called dots and dashes (or dits and dahs).
  • Example: .... . .-.. .-.. --- is “Hello” in Morse code.
• Letter Number Code
  • Replaces each letter with its position in the alphabet.
  • “Space” character is often encoded as a zero, but may be encoded as something else (or not encoded at all).
  • Example: “Hello World” is encrypted as: 8-5-12-12-15-0-23-15-18-12-4
• Braille Alphabet
  • Braille is a tactile writing system used by people who are visually impaired.
  • Each letter corresponds to a specific pattern of raised dots.
• Atbash Cipher
  • The Atbash cipher encodes a message with the reverse of the alphabet.
  • Example: “Hello World” is encrypted as: Svool Dliow
• Polybius Square Cipher
  • The Polybius square places all letters in a grid; each letter is represented by its coordinates in the grid.
  • A key could be used to reorder the alphabet in the square, with the letters (without duplicates) being placed at the beginning and the remaining letters following it in alphabetical order.
• Five Needle Telegraph Code
  • The Five Needle Telegraph Code (a.k.a. the Cooke and Wheatstone Telegraph) is represented by three characters \|/ in a set of 5.
  • Example: “Hello” is encrypted as: /\||| /|\|| |||/\ |||/\ ||\/|
• ASCII Shift Cipher
  • The ASCII shift cipher is like the Caesar cipher, but the ASCII table is used instead of the Latin alphabet, yielding 127 different offsets.
  • Example: “Hello World” is encrypted as: 08 25 2C 2C 2F 60 17 2F 32 2C 24 (with a shift of 64, output in hexadecimal).
• rot8000 Cipher
  • “rotate alphabet 0x8000 places”.
  • Variant of ROT-13 or ROT-47 adapted to Unicode with a rotation of 0x8000 (hexadecimal value).
  • Example: “Hello World” is encrypted as: 籛籘籝籁簹簹簹.

Code Beautify

CodeBeautify is an online Code formatter, decoder, converter.

• ZLib Decompress Online
• Number System Converter
• JSON Beautifier, Viewer, JSON Validator, JSON Cheat Sheet
• HTML Viewer
• Image to Base64 / Base64 to Image
• HEX to Decimal / Decimal to Hex
• Binary to Text, Binary to Decimal
• ASCII to Text
• Encryption/Decryption
• …and more

Misc. Command Line Cryptography Tools

• Ciphy
  • Automatically determine cipher and output result.
• FeatherDuster
  • Tool for breaking crypto (identifying and exploiting weak cryptosystems).
  • Run with: featherduster [ciphertext file 1] ... [ciphertext file n]
• Cryptanalib
  • Part of the Featherduster project; can be used independently of FeatherDuster.
  • Used to make Python-based crypto attack tools.
  • Documentation accessed through the Python help() function.
• Cryptanalib3
  • Python3 fork of cryptanalib module from FeatherDuster project.
  • Standalone module for performing cryptanalysis and cryptographic exploit development.
  • Import: Launch Python3 and import ca3.
  • Cryptanalib3 attempts to decode, identify, and look for indicators of vulnerability with th analyze_ciphertext() function.

Misc. Other decoders, etc.

• CacheSleuth
  • Mutli decoder
• CyberChef
  • Web app for encryption, encoding, compression, and data analysis.
  • Build “recipes” to analyze data.
  • Magic option tries to identify the cipher; attempts many decoding methods.
• cryptii
  • Modular conversion, encoding, and encryption online
• Shamir’s Secret Sharing
  • SSS is a secret sharing algorithm for distributing a secret among a group.
  • The secret cannot be revealed unless a quorum of the group acts together to pool their knowledge.
• Boxentriq
  • Online code-breaking, cipher, and logic puzzles solving tools.
  • Classic ciphers, text and word tools, analysis tools, modern ciphers, steganography, encodings, math, alphabets, etc.
• List of Online Tools for Ciphers and Codes
• Identify Encryption or Number Base

Brute force OpenSSL encrypted file

• Bruteforce Salted OpensSL
  • Try to find the password of a file that was encrypted with the openssl command.
    • OpenSSL encryption example: openssl enc -aes256 -salt -in clear.file -out encrypted.file
  • Can be used either to try all the passwords in a file or to try all possible passwords in a given charset.
• Easy Brute Force OpenSSL CTF
  • Bash script that given a password (or wordlist) tries to decrypt an OpenSSL encrypted file using several algorithms.

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Steganography Tools

For steganography tools, visit the Steganography Tools Page

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RSA Decryption Tools

• Integer Factorization Calculator
• Prime Factorization Calculator
• RSA Calculator
• dcode RSA Cipher Calculator
• Carmichael Function Calculator
• RsaCtfTool
  • Uncipher data from weak public keys and attempt to recover the corresponding private key.

AES

• bruteforce-salted-openssl
• openssl