16:01 Sunday , July 01st 2018

With more merchants including Cryptonize.it, Bitasia Exchange, Keys4coins, etc. starting to accept BCH zero confirmation transactions, concerns arise and some think it can be too risky due to double spends while some regard it as the key to broader cryptocurrency acceptance and propose solutions to the zero confirmation doubles spending:



1. A payment processing company can provide a service which makes it possible that the rapid distribution of transactions with good-enough checking in something like 10 seconds or less.

2. A relay system can make double spends harder.

3. Under a special transaction outputs mechanism, if two different signatures for the same output are disclosed, the private key used to sign the transaction is revealed.