<div dir="ltr"><div>I'll leave discussion of the actual entropy sources to others, but there are other aspects that are very important.</div><div><br></div><div>RNGs are commonly used for security, and therefore Trust becomes an essential consideration. If your RNG is untrustworthy (or actively malicious) an attacker can subvert most of the encryption that you take for granted.</div><div><br></div><div>You have to trust your environment, and that's the significant difference that OneRNG is providing - not only do we make it as easy as possible to compare the hardware *design* to the hardware *as built*, we also sign the firmware in a manner that makes it extremely difficult to tamper invisibly; plus in common with many others you have the ability to install your own firmware based on our source code if you prefer. This gives you the ability to *verify* the device that came in the post from China, rather than just trusting it because Jim and Paul are nice people.</div><div><br></div><div>So although the other devices tend to consider the output of large volumes of random data to be their goal, we consider the output of *trustworthy* random data to be ours. You really don't need much data, a device like this should be used as seed/input to a decent CSPRNG algorithm, not necessarily directly.</div><div><br></div><div>NeuG is an Open project, and you can see the sources for the hardware and the software. The device that you get isn't too small, and you can see the circuit layout. Yutaka Niibe has put a lot of thought in to this device, and I wish I could read Japanese better to see more of his comments :-) I'm not sure of the ubiquity of the two big components on that board, and I don't think there are mechanisms to help you verify the firmware.</div><div> <br></div>BitBabbler was new to me, and while the philosophy of having simpler hardware with the complexity in the host OS matches ours, I can't actually find any hardware design published, and of course the unit is in a sealed case. So while they have obviously put a lot of thought into the quality of the output, it's the input that's difficult to assess.<div><br></div><div>You might also want to consider the ChaosKey, <a href="http://altusmetrum.org/ChaosKey/">http://altusmetrum.org/ChaosKey/</a></div><div><br></div><div>-jim</div><div><br><div class="gmail_extra"><div class="gmail_quote">On Mon, Feb 20, 2017 at 3:24 AM, Vishnu <span dir="ltr"><<a href="mailto:p-6S2zOwrl6o4I8jK7k2IBQT@lists.onerng.info" target="_blank">p-6S2zOwrl6o4I8jK7k2IBQT@lists.onerng.info</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><u></u>
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<a href="http://lists.onerng.info/r/topic/6OG1HC5hFAMqs2dyrGPyBT" style="color:rgb(85,102,119);text-decoration:none" target="_blank"><b>Compare with NeuG and the BitBabbler</b></a>
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<span class="gmail-m_8164281991567375791line" style="display:inline-block;max-width:580px;overflow:hidden;text-overflow:ellipsis;white-space:pre-wrap;width:100%" width="100%">Is anyone aware of how exactly OneRNG differs from the two other 'open', similarly priced TRNGs, the NeuG and the BitBabbler (Black): ?</span><br>
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<br><span class="gmail-m_8164281991567375791line" style="display:inline-block;max-width:580px;overflow:hidden;text-overflow:ellipsis;white-space:pre-wrap;width:100%" width="100%"><a href="http://www.gniibe.org/memo/development/gnuk/rng/neug.html" style="color:rgb(85,102,119);text-decoration:underline" target="_blank">http://<b>www.gniibe.org</b>/memo/<wbr>development/gnuk/rng/neug.<wbr>html</a></span><br><span class="gmail-m_8164281991567375791line" style="display:inline-block;max-width:580px;overflow:hidden;text-overflow:ellipsis;white-space:pre-wrap;width:100%" width="100%"><a href="http://www.bitbabbler.org/what.html" style="color:rgb(85,102,119);text-decoration:underline" target="_blank">http://<b>www.bitbabbler.org</b>/<wbr>what.html</a></span><br>
<br><span class="gmail-m_8164281991567375791line" style="display:inline-block;max-width:580px;overflow:hidden;text-overflow:ellipsis;white-space:pre-wrap;width:100%" width="100%">Especially in terms of the sources of randomness?</span><br>
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