Over the past 72 hours, the Bitcoin protocol has been suffering from a malleability attack. The attack has been happening to quite a few users moving funds on the network. The transactions look like bitcoin being sent twice or “double spent.” Typically the real action gets confirmed by the network, and the misleading output disappears on most wallets. The attack has been said to be safe but rather a “nuisance”.
Over the past couple of months, the network has had similar malleability or spam attacks hitting the network and affecting confirmations. The cryptocurrency community has been aware of the problem with members like Charlie Lee speaking on the issue. Lee told CoinTelegraph that “Litecoin Shows There Is a Simple Fix for Spam Attacks on Bitcoin” and gave his opinion on the matter.
Developers have also been working on fixing the issue by adding a BIP 62 solution to the problem. However, developer Pieter Wuille has said there have been “complexities” involved with the implementation. Many members of the community are currently having grievances with the malleability attacks and people are Read more ... source: Cointelegraph