Sounds pretty fucking expensive.
You can get a $10 RTL-SDR [1] dongle that happily churns out over 2MSp/s and feed random radio noise to your entropy pool using rtl_entropy [2].
Also what's up with the flag, 'murica?
You can get a $10 RTL-SDR [1] dongle that happily churns out over 2MSp/s and feed random radio noise to your entropy pool using rtl_entropy [2].
Also what's up with the flag, 'murica?
This complaint is akin to people who complain "a $700 iPhone only has $150 of parts." It might be true, but it ignores the entire development cost, value add, and ease of use relative to buying a box of bolts and building an iPhone (or in this case a RND source).
Their price is very reasonable, and your $10 alternative is not a realistic alternative.
"If you're serious about the cryptographic security of your entropy source, you should probably short, or put a 50 Ohm load on the antenna port, and put the whole assembly in a shielded box. Then you're getting entropy from the thermal noise of the amplifiers which is much harder to interfere with than atmospheric radio."
But where do you find $10 dongles? I've found just NooElec NESDR XTR for $50? Edit: OK, there are cheaper dongles with RTL2832U, just not with E4000