RSA Encryption Explorer

The Building Blocks

Before we touch encryption, let's get familiar with three operations that power everything. Try changing the inputs and see what happens.

Modular Arithmetic — what is the remainder when you divide?

Modular Exponentiation — raise to a power, then find remainder.

Generating Keys

Choose two prime numbers. We'll derive your public and private keys from them — step by step.

Encrypting a Message

Enter a message (as a number smaller than N). Watch it lock itself with your public key.

Decrypting a Message

Now watch the private key reverse the process — recovering the original message.