# What percentage of evil actors is necessary to overtake a group? **URL:** https://forum.duniter.org/t/what-percentage-of-evil-actors-is-necessary-to-overtake-a-group/311 **Category:** Discussion **Created:** [24 June 2015 04:15 UTC](https://forum.duniter.org/t/what-percentage-of-evil-actors-is-necessary-to-overtake-a-group/311 "2015-06-24T04:15:28Z") **Posts on this page:** 1 **Showing post:** 6
### Author: ![cgeek](https://forum.duniter.org/user_avatar/forum.duniter.org/cgeek/32/279_2.png) [@cgeek](https://forum.duniter.org/u/cgeek) #### Post date: [25 June 2015 10:59 UTC](https://forum.duniter.org/t/what-percentage-of-evil-actors-is-necessary-to-overtake-a-group/311/6 "2015-06-25T10:59:48Z")
First, 2 signatures was for the simplicity of the example, it is very low. We rather think of 8 signatures for our first try (~1 million members max). You also have to see that there is a _delay between each signature_: during last FMM, we thought about 1 or 2 weeks between each. So the Sybils does not join instantly, we have time to see them coming. We could argue that this operation is **time costly**. But more importantly, this type of attack can be lowered by using the distance rule. Typically, you just have to sign individuals you deeply know (family, neighboors, etc) and do not try to reach your maximum stock of signatures. This way, you limit the possible paths from you and **maximize the distance between you and Sybils**. Finally, we have to understand that **cheat have to be tolerated** , by the simple fact we know we cannot avoid it. Even centralized systems cannot avoid it. So let’s assume this will exist. The only thing we want is to limit it so it won’t cause a currency collapse. By the way, it is exactly what our body does with bacterias 🙂 And ultimately, this is a human organization. Other constraints may be applied **on top of uCoin** by them. Simply think about Laws. --- _[View the full topic](https://forum.duniter.org/t/what-percentage-of-evil-actors-is-necessary-to-overtake-a-group/311)._