Message signature is implemented by encrypting the message with a private key, it allows users to verify the owner of an address. Below is a tutorial on verifying message signatures using ViaWallet.
Step 1: Enter "Me" from the navigation bar below, and choose "Advanced"
Step 2: Choose "Signature Verification" from the list of advanced features
Step 3: Choose the crypto that its address is to be verified
Step 4: Fill in the blanks
Step 5: Tap the "Verify" button, if the toast prompt "Signature Match" appears on the top of the interface, it means that the other party who generated the message signature is indeed the owner of the address