Didn't DJB somewhere describe a PRNG model in which this is not true and you shouldn't let an adversary give you PRNG seeds? (I don't have any problem with wha

Didn't DJB somewhere describe a PRNG model in which this is not true and you shouldn't let an adversary give you PRNG seeds? (I don't have any problem with what CloudFlare is doing.) Edit: While I was writing this comment, drewbug linked to the exact DJB post I was thinking of. Thanks!