Thank you shorena. Concerning the blockchain.info wallet I found a solution a month ago when I read a thread of the forum with a link about BIP39 Mnemonic Code Converter where I put the passphrase and public keys with their private keys appeared in the screen. So I solved this issue. I asked about how to reuse an address because I don't want the mess. For example, a web wallet, a desktop wallet, a hardware wallet so many passwords and mnemonic codes. Furthermore I want to retain some addresses from previous wallets like the one I have in my profile. Thanks to longbob72 the answer was really simple to follow.

You have right. It's [2] link. With this you wrote "...received on an address you have in multiple wallets..." is complicated enough for me with the knowledge I have at this moment. My issue is that I want to change wallet from web wallet (blockchain.info) to a desktop one (electrum or multibit) but I want one public address from web wallet to be appeared only in my new desktop wallet. So I think to apply the following steps and I would ask you to confirm if these and their chronological order are right or not:

1. Install the desktop wallet (electrum or multibit).
2. Spend all the funds from web wallet to desktop wallet (I don't care the network address).
3. Assume that I want to "transfer" network address: 1NPr3........ from Blockchain.info wallet to Electrum or multibit and I know its private key.
4. I sweep (importing private key), even though there are no funds [spend on step 1.] to Electrum or multibit wallet.
5. I check that address 1NPr3........ appears in Electrum or multibit.
6. I delete address 1NPr3........ from Blockchain.info ( It's complicated for me to check if wallets are synced).
7. This address appears ONLY in my new desktop wallet

Thank you in advance for your time you explain to me.

Ok. I didn't imagine but is logical because first creates the seed and after you import an address. Even though there is no protection, in case my computer or HD crashes, covered by the seed for this particular address I will keep blockchain.info wallet as backup. My wish to change wallet begun because of bc.i removed the facility in newer versions to sign a message.

<3 thanks for reading it, the message verified just fine.

Yes, I could verify the message.

It isn't benign stored in the Blockchain due to the fact that it doesn't need to be. It can all be done locally if you know how.

Read this: https://bitcoinmagazine.com/articles/bitcoin-address-sign-1399914228


And read up on public key cryptography.

for starters thank you very much for this awesome guide here.
It proves to me you are a person who cares/loves BTC ecosystem and the forum community  

my mind running wild for decades ,and i love to provide ideas and problem solutions
this time for some days i try to find a decentralized 2FA-like procedure
it is a little brick from a bigger project/vision , nvm , here is the question :

anyone can get a new bitcoin address , no need to register any private data/mail etc for that.
in this thread i see you supplied ways to sign and verify messages for that bitcoin address.
many people are concerned about their privacy , and many well established bitcoin sites
asking too much private data already . some months now a new trend came in haste 2FA
the mainstream applications to 2FA so far are big well established companies like Google etc.
such huge companies not care much for freedom of money or privacy for users.

example: i have account nicknamed Me322 at xxx66xxx.ccc site with a password *****
i make a new bitcoin address 1bn... and i sign a message sent to the site as 2FA reference
when me or the site needs to check through 2FA i simply reply signing a new message

register 2fa/signed message from add xxx blah blah//
sign-in with 2fa/signed message : blah blah .../

question i have for you is : did i miss something or did you see security flaws or ...   potential ?

Have a nice day and thanks in advance - Elias C.

 

Thanks for the insight.
I was just browsing the forums here, checking out the lending forum and saw some people talk about signed messages...
I looked around until I found this thread...
Very nice tutorial with pictures and such.

Appreciate it.

From Electrum wallet
Someone PLeaseeee answer me ! I wanna know
Edit: Calimero style, Shorena or anybody, is my message good ?