3 ms·

This isn't really an attack, is it? I mean, the money still gets from who it's suppose to get from to who it's suppose to get to? It's only an "attack" if you

This isn't really an attack, is it? I mean, the money still gets from who it's suppose to get from to who it's suppose to get to? It's only an "attack" if your wallet software doesn't validate against the recommended (iirc: to_addy, from_addy, amount, time-in-tx), correct?

ikken 13y ago
I think this may be the way for attackers to force price of BTC to fall down, then buy tons of them to sell when the price goes up again.
- jimktrains2 13y ago
  How does TM affect the price?
  - wmf 13y ago
    It causes FUD and panic.
    - jimktrains2 13y ago
      I can cause FUD and panic w/o TM though:-p
      - MichaelGG 13y ago
        Well pointing out that large implementations thought they had a transaction ID, and that the transaction ID can just change later -- that's some decent technical-level "FUD".
kens 13y ago
Yes, the modified Bitcoin transaction performs exactly the same transfer between the same addresses. There is no double-spend as far as the Bitcoin system is concerned since only one of the transactions will get confirmed by miners. Linguistic arguments are kind of pointless, but it's still an attack even if they are just trying to disrupt the system and not steal anything. e.g. a denial-of-service attack. Various definitions of "attack" are at http://en.wikipedia.org/wiki/Attack_(computing) http://en.wikipedia.org/wiki/Attack_(computing)
- jimktrains2 13y ago
  But if you handle tx properly it doesn't disrupt your system.
  - sillysaurus2 13y ago
    The seriousness of this attack is that several major bitcoin services lost a lot of money because of it. It's an attack.
    - erikpukinskis 13y ago
      It's an attack, it's just not an attack on Bitcoin.
      - sillysaurus2 13y ago
        This is mincing words. It's an attack on bitcoin. Many major exchanges were shuttered while they dealt with it, for example. It's certainly not an attack on not-bitcoin, so therefore it's an attack on bitcoin.
        jimktrains2 13y ago
        There's an attack on credit cards because Target had a breach! See, I can say ridiculous things too. Someone using bitcoins didn't follow protocol and as such as scammed out of money. This isn't a bitcoins-protocol issue, this is a people issue. Note that the other exchanges are up now, very quickly after everyone stopped to check themselves.
        smackfu 13y ago
        The Target hack certainly disrupted the credit card system, by causing a lot of reissued cards.
        jimktrains2 13y ago

ikken 13y ago

I think this may be the way for attackers to force price of BTC to fall down, then buy tons of them to sell when the price goes up again.

jimktrains2 13y ago
How does TM affect the price?
- wmf 13y ago
  It causes FUD and panic.
  - jimktrains2 13y ago
    I can cause FUD and panic w/o TM though:-p
    - MichaelGG 13y ago
      Well pointing out that large implementations thought they had a transaction ID, and that the transaction ID can just change later -- that's some decent technical-level "FUD".

kens 13y ago

Yes, the modified Bitcoin transaction performs exactly the same transfer between the same addresses. There is no double-spend as far as the Bitcoin system is concerned since only one of the transactions will get confirmed by miners. Linguistic arguments are kind of pointless, but it's still an attack even if they are just trying to disrupt the system and not steal anything. e.g. a denial-of-service attack. Various definitions of "attack" are at http://en.wikipedia.org/wiki/Attack_(computing) http://en.wikipedia.org/wiki/Attack_(computing)

jimktrains2 13y ago
But if you handle tx properly it doesn't disrupt your system.
- sillysaurus2 13y ago
  The seriousness of this attack is that several major bitcoin services lost a lot of money because of it. It's an attack.
  - erikpukinskis 13y ago
    It's an attack, it's just not an attack on Bitcoin.
    - sillysaurus2 13y ago
      This is mincing words. It's an attack on bitcoin. Many major exchanges were shuttered while they dealt with it, for example. It's certainly not an attack on not-bitcoin, so therefore it's an attack on bitcoin.
      - jimktrains2 13y ago
        There's an attack on credit cards because Target had a breach! See, I can say ridiculous things too. Someone using bitcoins didn't follow protocol and as such as scammed out of money. This isn't a bitcoins-protocol issue, this is a people issue. Note that the other exchanges are up now, very quickly after everyone stopped to check themselves.
        smackfu 13y ago
        The Target hack certainly disrupted the credit card system, by causing a lot of reissued cards.
        jimktrains2 13y ago