I read this part of post by Theymos about the recovery of an hacked account:
"If you want me to recover a hacked/lost account, you need to prove that you own it. Typically, the only acceptable method of proving ownership is by signing a message (including current date and desired new email address) using a Bitcoin address or PGP key associated with the account. A Bitcoin address or PGP key is associated with the account only if the account posted the key/address, sent it in a PM, or if it is still listed in the account's profile."
Can someone tell me what is a "signed message" and can be created. I don't know what is a PGP key and where to find it. I don't know to send a signed message using a bitcoin address. I saw and read in the above post a signed message but I don't know how to do it. Could someone help me explaining in details how to do this. My account is not hacked but just in case....
Thank you!
Maybe this will help you:
https://bitcointalk.org/index.php?topic=271537.msg2907869#msg2907869