I was doing some research on Double Spending and stumbled on this site:
glasshunt.co/exploits/bitcoin-double-spend/They claim they allow for easy double spending? Is that a thing?
It seems pretty legitimate but I'm not sure if it's safe. I want to do some looking into how this works before allowing people to use Bitcoin on my blog website and things like this kind of worry me. How would someone use a site like this? Do they work?
Thought I saw some stuff about Ethereum too. Can you double spend an ethereum too?
Using an Alt also since I think this might be a sensitive subject...
Seems fishy to me:
step 1: send bitcoins to our address, wait untill the transaction is confirmed
step 2: we'll pay for your goods/service, and double spend the inputs with an output to your address...
As soon as the transaction from step 1 is included in a block (confirmed), it's next to impossible to do a double-spend unless there's a fork that didn't include your transaction... At this point, you're at the mercy of the website, since they now have your coin, and there is no way to charge back.
This means the service should do the complete double-spend for you, holding on to your funds as collateral, or using the inputs from step 1...
However, there is no guarantee they'll actually do this, so it might be a scam attempt (altough this is not confirmed!!!)
On the other hand, it IS rather simple for anybody with a little bit of technical knowledge to succesfully create a double spend, just not using that website.