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Explore the evolution of Cryptographically Secure Random Number Generators (CSRNG) in Linux userspace in this 18-minute talk from Linaro. Learn about the journey from the initial glibc arc4random proposal to the modern vDSO-based getrandom implementation, including the challenges of supporting legacy kernels, the short-lived BSD-based implementation, and the specific requirements for optimizing on aarch64 architecture. Understand the technical considerations and design decisions that shaped how random number generation works in userland Linux environments.
