Explore a 21-minute talk from Crypto 2013 on time-optimal interactive proofs for circuit evaluation. Delve into the problem, context, and background of this cryptographic topic. Examine the downsides of regular circuits and analyze experimental results. Investigate irregular circuits, parallel computation, and matrix multiplication. Compare this approach to prior work, gain insights into practical applications, and understand the context of the research. Discover potential future directions in this field of cryptography.