Exam CAS-004 topic 1 question 526 discussion

 ChaCha20-Poly1305 is known for its efficiency in software implementations, especially on devices without hardware acceleration, making it more CPU-efficient than AES-GCM  It generally uses less RAM compared to other ciphers  It is supported by TLS 1.3, ensuring secure and efficient encryption for broadcasting video or audio

ChaCha20-Poly1305 is highly efficient on CPUs that lack hardware acceleration for AES (Advanced Encryption Standard). Unlike AES-GCM, which relies heavily on hardware optimizations (like AES-NI instructions) for peak performance, ChaCha20-Poly1305 maintains high performance across a broader range of hardware, including mobile devices and embedded systems. ChaCha20-Poly1305 is fully supported in TLS 1.3, ensuring that customers can use it seamlessly for secure communications during video or audio broadcasts. TLS 1.3 prioritizes modern, secure cipher suites, and ChaCha20-Poly1305 aligns well with its security enhancements.

A. IDEA-CBC - CBC is not supported by TLS 1.3 (Old and likely not used often) B. AES-GCM - Requires Hardware acceleration, if you dont want to sacrafice speed. supported by TLS 1.3 *C. ChaCha20-Poly1305 - The fastest and supported by TLS 1.3 "THE RIGHT ANSWER" D. Camellia-CBC - CBC is not supported by TLS 1.3 (Old , but still used)