I read that earlier today. did you read that? it was arbitrary, no math behind it.
http://www.docdroid.net/9yub/forging.pdf.htmlIt Should be Observed That this probability does not out stretch to 0 (asm! 1) if the bad guy has at Least 1 = 3 of all active balances in the network in the case of U-algorithm (corresondingly, At Least 1 = 2 in the case of exp-algorithm). There should exist some specific methods for protecting network against Such an attack in the CASE WHEN there is risk that (active) relative balance of the bad guy Could Become larger than the above threshold
it may be a good idea to limit the forging power of accounts by some fixed threshold, e.g., if an account has more than, say, 300K NXT,then it forges as if it had exactly 300K NXT. Of course, a rich guy can split his fortune between smaller accounts, but then all those accounts would forge roughly as one big account (without threshold) under Exp-algorithm. One can one use the computationally easier U-algorithm without having the drawbacks discussed in this section.
how to interpret the 1 = 3 and 1 = 2 parts? Nevermind, from the paper, its 1/3 and 1/2. The problem is theres no way to determine "all active balances". I suggested limiting effectiveBalance a few weeks ago, but 300K seems excessively excessively harsh, and will also make a 1000tps network pretty much unfeasable, since it would require literally thousands of TF nodes that publish their IP and have DDoS protection, HA redundancy, etc
This is the question. if you can not know in real time the total efecctive balance must to look for another
solution.,
would have to conciliate the following features in my humble opinion;
a) limit forging power to 0.1 (limit 1/3) total active balance maximun per account.
b) chance forging for any account and funds must be about one day (share fee group)
if you have 1.000 VPS nodes (share free groups) and you limit forging power to 1.000.000 Nxt per account
then
1440 blocs per day means that 1.000.000 Nxt account forge every day
if you have more than 10.000.000 Nxt in this 1.000 VPS nodes then 1.000.000 Nxt per account is less or equal
than 0.1 * 10.000.000 Nxt
c) 1000 TPS
i do not how is the solution