موضوع: 比特币钱包安全性

Do not sign your back of your own cards. The probably heard this one before. I have and very first thought was that another man who might find it would then just sign it and possess a matching signature file. Of course the answer is to write in Check ID. In fact, I owned a few credit cards before ever hearing concerning and returned later and wrote in the corner on the signature space on the trunk of the CID.for see I.D. Most merchants identify that and ask me for identification. These people al...