Free RSA Public Key Cryptography

Asymmetric Cryptography

Unlike AES (which uses one key to lock and unlock), RSA is asymmetric. It involves a pair of keys: a Public Key (which can be shared with anyone) and a Private Key (which must be kept completely secret). Data encrypted with the Public Key can only be decrypted by the matching Private Key.

Digital Signatures

RSA is heavily used for non-repudiation. If you encrypt a document hash with your Private Key, anyone can decrypt it using your Public Key. Because only your Private Key could have created that specific encrypted output, it proves the document came from you and hasn't been altered.

Browser-Based Security

Because the Private Key grants ultimate authority over decryption and signature generation, it must never be exposed. Developers utilize native browser APIs to generate rsa key pair offline safely client side, ensuring no over-the-wire interception is possible during creation.