After completing this video, the learner will understand the use of the RC4 stream cipher.
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- [Voiceover] RC4 is a symmetric stream cipher…that was widely used to encrypt network communications.…Invented in 1987 by the famous cryptographer…Ron Rivest of RSA Security,…RC4 was maintained…as a proprietary trade secret algorithm…until someone leaked it on the internet in 1994.…Since the algorithm was not protected by a patent,…it then became available in the public domain.…As a strong and efficient stream cipher…RC4 was widely used for many years…in a variety of network-based encryption schemes.…
On the wireless networking side,…both the Wired Equivalent Privacy, or WEP,…and Wi-Fi Protected Access, or WPA, protocols…allowed the use of RC4.…At the application layer,…both the Secure Sockets Layer, SSL,…and its replacement, Transport Layer Security, TLS,…allowed the use of RC4…as their underlying cryptographic algorithm.…The RC4 stream cipher works by creating a stream of bits…to use as the encryption key.…
This stream has many of the qualities of a random string…but it is not quite random because it is initialized…
This course is part of a six-course series on the CompTIA Security+ exam, and is useful for IT professionals who wish to learn more about information security as well as students preparing to take the Security+ exam.
We are now a CompTIA Content Publishing Partner. As such, we are able to offer CompTIA exam vouchers at a 10% discount. For more information on how to obtain this discount, please download these PDF instructions.
- Choosing encryption algorithms
- Applying symmetric and asymmetric cryptography standards
- Implementing key management, including key exchange and key stretching
- Working with public keys, trust models, and digital certificates
- Using transport encryption protocols
- Securing wireless networks
Skill Level Intermediate
2. Symmetric Cryptography
3. Asymmetric Cryptography
4. Key Management
5. Public Key Infrastructure
6. Transport Encryption
7. Wireless Security
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