Bitcoin Forum
December 08, 2016, 12:03:44 PM *
News: To be able to use the next phase of the beta forum software, please ensure that your email address is correct/functional.
 
   Home   Help Search Donate Login Register  
Pages: [1]
  Print  
Author Topic: Is an hypothetical "chance" attack possible?  (Read 1003 times)
Xunie
Full Member
***
Offline Offline

Activity: 132



View Profile
October 12, 2010, 10:13:19 PM
 #1

People discussed that there is an element of "chance" or "luck" involved in generating a block.
So, one day I might generate two blocks while another day I might generate none.

Now the network is build around people generating blocks which seals in the transactions etc.
And since a double spending attack is possible by 'reversing' the block -- which requires significant CPU time --,
is the 'double spending attack' based a bit on chance, or not?

If so, then an attacker wouldn't just need half the network, or more.
The attacker needs just 40 percent of the network? more or less, right?
It all depends on chance if reversing the block has a chance element to it.

So I ask my fellow Bitcoiners: Does it?

PS: Sorry for being away, I'll be on the forum from now on again!

Thank me for this post here: 1PyNKEyqtDFB4HBG8ueDVxdPZfgwC6gAqw
Caffeinism -- a toxic condition caused by excessive ingestion of coffee and other caffeine-containing beverage.
Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untrustworthy, or illegal in your jurisdiction. Advertise here.
1481198624
Hero Member
*
Offline Offline

Posts: 1481198624

View Profile Personal Message (Offline)

Ignore
1481198624
Reply with quote  #2

1481198624
Report to moderator
1481198624
Hero Member
*
Offline Offline

Posts: 1481198624

View Profile Personal Message (Offline)

Ignore
1481198624
Reply with quote  #2

1481198624
Report to moderator
Gavin Andresen
Legendary
*
Offline Offline

Activity: 1652


Chief Scientist


View Profile WWW
October 12, 2010, 11:05:38 PM
 #2

Sure, there are a couple of tables in the back of Satoshi's bitcoin paper that calculate the chances based on what percentage of CPU work you're contributing.

How often do you get the chance to work on a potentially world-changing project?
Pages: [1]
  Print  
 
Jump to:  

Sponsored by , a Bitcoin-accepting VPN.
Powered by MySQL Powered by PHP Powered by SMF 1.1.19 | SMF © 2006-2009, Simple Machines Valid XHTML 1.0! Valid CSS!