Guide: How to sign or verify a XTZ message

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 0. Purpose
You can sign a message with your Tezos address to prove you own and control it. Alternatively, you can verify a message came from a specific Tezos address.
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 1. Install Galleon wallet
Galleon is the first easy to use wallet with sign & verify message functionality.
Download version 1.1.0b or greater here: https://github.com/Cryptonomic/Deployments/wiki/Galleon:-Releases#preview-releases​
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 2. Sign a message
1.Open Galleon
2.Click the Sign & Verify button
Sign & Verify button in Galleon wallet
3. Enter your message in the textbox
4. Click Sign button.
If you are using a Nano Ledger S, click "Accept" on the device.
Signing a message in Galleon
A signature is generated from your message and tezos address. You can share these three pieces of information with another person to prove ownership.
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 3. Verify a message
1.Click the Verify tab.
2.To verify a message, simply paste in the 1. message, 2. signature, and 3. Tezos public address accordingly.
3.Click the Verify button.
4.When all the information is correct, the Signature is confirmed.
Verifying a message