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You want a speed that's hard to reach even for a simple operation such as xoring the PRNG output with some data. You aren't going to get that speed for a CSPRNG except maybe with some serious dedicated hardware engineering. But you don't need this! Sequential speed is not relevant for a PRNG with unspecified hardware. If you need more PRNG speed than your ...


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The first thing to NOTE is that said by SEJPM in the comment, performance depends on the hardware - in both horizontal (core count, etc.) and vertical (clock speed, etc.) dimensions. The second thing to understand is that, although CSPRNGs and stream ciphers can share underlaying primitive, their security requirements are different. So now, let's get started ...


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