Ciphers & Codes

A page dedicated to simple text manipulation tools, which all can be replicated with just paper and pencil

Featherduster

For breaking crypto; It tries to make the process of identifying and exploiting weak cryptosystems as easy as possible

PkCrack

Breaking PkZip-encryption ciphers

RsaCtfTool

RSA multi attacks tool : uncipher data from weak public key and try to recover private key

Rsatool

Calculates RSA (p, q, n, d, e) and RSA-CRT (dP, dQ, qInv) parameters given either two primes (p, q) or modulus and private exponent (n, d)

Xortool

XOR analysis, guess the key length or key

John

Enhanced, "jumbo" version of John the Ripper supports hundreds of hash and cipher types

Ophcrack

Free Windows password cracker based on rainbow tables

Quipqiup

An online tool for breaking substitution ciphers or vigenere ciphers (without key)

Vigenere

online tool breaks Vigenere ciphers without knowing the key

One Time Pad

Online tool for playing with one-time pad ciphers

Cmd5

Yet another site to decrypt hashes they also claim to brute force it within 5 days if it's not in their DB?

Ciphey

Automatically decrypt encryptions without knowing the key or cipher, decode encodings, and crack hashes

Text Converter

Text Converter converts text to other encodings or other formats. Supported formats include Base64, Quoted-Printable, URL encoding, HTML encoding, various types of text conversion and formatting, as well as hash calculations

Cryptii

Web app offering modular conversion, encoding and encryption online. Translations are done in the browser without any server interaction. Very handy CTF tool!