Its like saying u are owner of particular address. But process of signing is quite complicated i know that much.
Someone should make easy solution to fast sign message, really simple solution.

all the informations are in the OP, check it and you will find answers to your questions. basically signing a message is proving you have full control over an address that you signed

Is that a question?  There's no other way to prove that you own an address as good as signing a message.  Some people may accept sending a specific amount of bitcoins to any address as proof but a determined scammer may try to pay the real owner to make a transfer.  Of course they can still try to do the same for signed message but no bitcoiners with half their brain would sign a message saying that their address is controlled by someone else.

This is a great resource thread! Thanks.

I was looking for this before because of i do not know what is the good format to sign a message that is why i made a format with my own like this

Sign Message:
Address:
Signature:

But in some deals they are still accepting it..
Now i added it to my bookmarks so that i can give new sign message with proper format.. thanks

well i have to say signing a message isn't a task for a newbie.
But when you already do this for the first time, it gets easier and easier!
Im doing it really fast already

Hahaha i see that you are same like me
i was like sitting 2 hours just to learn how to sign a message, and it was so damn tough to achieve...
But as u said, now i do it faster, i would even said that im doing it almost instantly like a robot!

I need this signed message thing but I'm not that techie when it comes to this kind of stuff, so I'm really confused on how to use it, I have an airbitz wallet, but I can't find the option for signing message, I guess it doesn't have one. So do I just need to change wallet? If so what is the best and secured wallet to use with sign message option? Thanks anyone

I wouldnt suggest using mutlitbit classic just because its no longer maintained (besides critical bugs). It will likely no longer work properly when SegWit is activated.

@zer01ten as you can see from the first post there are several wallets that easily allow you to sign messages. The question is whether or not you need to sign with a specific key, for a specific address. If thats the case, it might not be possible. If you can sign with any new address, electrum is probably the quickest to setup.

For starters try signing a message like this:


with just any of the electrum addresses and post it here so we can try to verify it.