Re: Entropy sources (was: /dev/random - a new approach)

2016-08-25 Thread Sandy Harris
On Thu, Aug 25, 2016 at 5:30 PM, H. Peter Anvin wrote: > The network stack is a good source of entropy, *once it is online*. > However, the most serious case is while the machine is still booting, > when the network will not have enabled yet. > > -hpa One possible solution is at: https:/

Re: Entropy sources (was: /dev/random - a new approach)

2016-08-25 Thread H. Peter Anvin
On 08/20/16 22:37, Jeffrey Walton wrote: >> >> The biggest problem there is that the timer interrupt adds *no* entropy >> unless there is a source of asynchronicity in the system. On PCs, >> traditionally the timer has been run from a completely different crystal >> (14.31818 MHz) than the CPU, wh

Entropy sources (was: /dev/random - a new approach)

2016-08-20 Thread Jeffrey Walton
On Fri, Aug 19, 2016 at 1:20 PM, H. Peter Anvin wrote: > On 08/18/16 22:56, Herbert Xu wrote: >> On Thu, Aug 18, 2016 at 10:49:47PM -0400, Theodore Ts'o wrote: >>> >>> That really depends on the system. We can't assume that people are >>> using systems with a 100Hz clock interrupt. More often th