rng-tools-debian binary package in Ubuntu Focal riscv64

 The rngd daemon acts as a bridge between a Hardware TRNG (true random
 number generator), such as the ones in some Intel/AMD/VIA chipsets,
 and the kernel's PRNG (pseudo-random number generator).
 .
 It tests the data received from the TRNG using the FIPS 140-2 (2002-10-10)
 tests to verify that it is indeed random, and feeds the random data to the
 kernel entropy pool.
 .
 This increases the bandwidth of the /dev/random device, from a source
 that does not depend on outside activity. It may also improve the
 quality (entropy) of the randomness of /dev/random.
 .
 A TRNG kernel module such as hw_random, or some other source of true
 entropy that is accessible as a device or fifo, is required to use this
 package.
 .
 This is an unofficial version of rng-tools which has been extensively
 modified to add multithreading and a lot of new functionality. However,
 most users of newer or high-bandwidth HWRNGs might wish to install the
 5.x version of rng-tools, also packaged as rng-tools5, instead; while
 it lacks some of the new functionality from this version, it offers
 more performant support for those.

Source package