RC4-based Cryptosystems
- WEP
- WPA (default algorithm, but can be configured to use AES-CCMP instead of RC4)
- BitTorrent protocol encryption
- Microsoft Point-to-Point Encryption
- Opera Mini
- Secure Sockets Layer (optionally)
- Secure shell (optionally)
- Remote Desktop Protocol
- Kerberos (optionally)
- SASL Mechanism Digest-MD5 (optionally)
- Gpcode.AK, an early June 2008 computer virus for Microsoft Windows, which takes documents hostage for ransom by obscuring them with RC4 and RSA-1024 encryption
- Skype (in modified form)
Where a cryptosystem is marked with "(optionally)", RC4 is one of several ciphers the system can be configured to use.
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