RC4 Encryption/Decryption

Encrypt and decrypt text using the RC4 stream cipher. While it has some vulnerabilities, it is still widely used in legacy protocols.

About RC4 Encryption

RC4 (Rivest Cipher 4) is a stream cipher known for its simplicity and speed. While it was once widely used in protocols like WEP and SSL, it is now considered legacy due to vulnerabilities, but remains useful for educational purposes and non-critical data.

How to Use?

  1. Choose Encrypt or Decrypt mode.
  2. Input your text.
  3. Enter a key (password).
  4. Get the result.

Features

  • Simple Algorithm: Easy to understand and implement.
  • Fast: Very low computational overhead.
  • Historical Significance: A key part of internet history.

FAQ

Is RC4 secure?

No, modern cryptanalysis has found significant vulnerabilities in RC4. It should not be used for securing sensitive data in new systems.

Why is it still here?

It is provided for compatibility with legacy systems and for educational study of cryptography.