RC4 Encryption

Encrypt text using RC4 algorithm. RC4 stream cipher - simple and fast encryption.

Secret Key
Enter your encryption key
Plaintext
Enter text to encrypt
Encrypted Text
RC4 ciphertext

What is RC4 Encryption?

RC4 (RC4 stream cipher - simple and fast encryption) is a symmetric encryption algorithm that encrypts and decrypts data using the same secret key.

Key Features

  • Symmetric Encryption: Same key for encryption and decryption
  • Secure: RC4 provides strong data protection
  • Fast: Efficient encryption and decryption
  • Widely Supported: Available in most crypto libraries

How It Works

  1. Plaintext + Secret Key → Encryption → Ciphertext
  2. Ciphertext + Secret Key → Decryption → Plaintext

The secret key must be kept confidential and shared only with authorized parties.

Common Use Cases

  • Data Protection: Encrypt sensitive files and documents
  • Secure Communication: Protect messages in transit
  • Database Encryption: Secure sensitive database fields
  • File Encryption: Protect files on disk
  • API Security: Encrypt API payloads

Security Best Practices

  • Keep Keys Secret: Never share or expose encryption keys
  • Strong Keys: Use long, random keys (16+ characters)
  • Key Management: Store keys securely, separate from data
  • HTTPS: Use encrypted connections when transmitting keys

Example

Plaintext: Hello, World! Secret Key: my-secret-key Encrypted: Random-looking ciphertext that can only be decrypted with the correct key