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Cryptanalysis

Brute Force Experiment

Caesar Cipher Breaker

Frequency Analysis Tool

Cryptography

Asymmetric Ciphers

Diffie-Hellman Key Exchange

Symmetric Ciphers

Block Ciphers

AES Cipher

DES Cipher

Stream Ciphers

RC4 Cipher

XOR Cipher

Substitution Ciphers

Monoalphabetic Ciphers

Affine Cipher

Atbash Cipher

Caesar Cipher

Kamasutra Cipher

Pigpen Cipher

Simple Substitution Cipher

Polyalphabetic Ciphers

Playfair Cipher

Vigenère Cipher

Vigenère Cipher Tabula Recta

Transposition Ciphers

Rail Fence Cipher

Route Cipher

Scytale Cipher

Hash Functions

All-in-One Hashes

Avalanche Effect Experiment

Random Numbers

Linear Congruential Generators (Recipes)

Linear Congruential Generator (Custom)

Linear Feedback Shift Register (LFSR)

Middle Square Method

Other

Homophonic Cipher

Codebooks

Culper Codebook

Navajo Codebook

Steganography

Null Cipher

Mathematics

Discrete Mathematics

Combinations

Factorials

Permutations

Number Theory

Exponents

Modular Arithmetic

Modular Clock

Modular Cyclic Groups

Modular Exponentiation

Modular Inverse by Brute Force Calculator

Modular Inverse by Extended Euclidean Algorithm Calculator

Modular Number Line

Modulo N Calculator

Modulo N Congruences Calculator

Multiplicative Groups

Primitive Root Modulo N

Quotient Remainder Theorem

Square and Multiply

Prime Numbers

Carmichael Numbers

Coprime Calculator

Coprime Generator

Factors Calculator

Fermat's Little Theorem

GCD by Euclidean Algorithm Calculator

GCD by Trial Division Calculator

LCM by Euclidean Algorithm Calculator

Prime Number Calculators

Sieve of Eratosthenes

Resources

Base64

Morse Code

Text Tool

Podcasts

OWASP PDX

Square And Multiply

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Citations, References, and Links