blockchain.info false positives | Bitcointalksearch.org

ThomasV

legendary

Activity: 1896

Merit: 1353

Quote from: koin on February 23, 2012, 12:57:42 PM

what are you considering to be a false positive though? are you thinking that since any transaction that didn't originate from 78.47.154.42 was relayed by someoen else thus if blockchain.info reports that transaction "first relayed by" by 78.47.154.42 then that is technically false?

yes.

koin

legendary

Activity: 873

Merit: 1000

trying to understand but i'm missing something.

that link http://blockchain.info/ip-address/78.47.154.42 shows which transactions that 78.47.154.42 was the very first node (of the ones that blockchain.info is connected to) to relay each of the transactions in the results list.

78.47.154.42 is electrum's server so you know which transactions 78.47.154.42 relayed.

what are you considering to be a false positive though? are you thinking that since any transaction that didn't originate from 78.47.154.42 was relayed by someoen else thus if blockchain.info reports that transaction "first relayed by" by 78.47.154.42 then that is technically false?

ThomasV

legendary

Activity: 1896

Merit: 1353

I compared the last 50 transactions relayed by my Electrum server with the list displayed at http://blockchain.info/ip-address/78.47.154.42

Results:
- accuracy: 36%
- false positive rate: 64%

Technically, it's not too bad, because the number of possible IPs in the network is quite large.
However, I don't think that such a high error rate makes the data useful for any purpose.
Maybe they should publish a list of n IPs that could have relayed the transaction, with a percentage of confidence.

Topic: blockchain.info false positives (Read 1553 times)