To get the Security Card public key:

  1. At the top of the home screen, tap the nut icon. 
  2. Select Signatures. 
  3. Select the Security Card which public key you want to copy. 
  4. Select Show key. 
  5. Tap your Card to the smartphone camera. 
  6. Tap the address of the key. Surf will copy the address to the clipboard.

You can copy Cards keys and insert them into a text editor to deploy a Multisig profile in the future.