"Native Client is a sandbox for running untrusted x86 native code. It aims to give browser-based applications the computational performance of native applications without compromising safety. Native Client uses static binary analysis to detect security defects in untrusted x86 code, and dynamic fault isolation to limit the effects of bugs in untrusted code. We describe the design and implementation of Native Client, and evaluate its performance on compute-intensive benchmarks. We find that Native Client imposes a low performance penalty—typically less than 5%—while providing strong security guarantees."
The naclwebplugin was famous for its "defense in depth" approach to security: naclwebplugin
Porting console-quality games (like Bastion ) to run in a browser tab. "Native Client is a sandbox for running untrusted
<embed src="module.nmf" type="application/x-nacl" width=640 height=480> We describe the design and implementation of Native
Introduced an architecture-independent version that allowed code to run across different CPU types without recompilation.