Does the MPK or Privkeys or seed become more derivable if you sign or use more addresses::
[1] for addresses that have been used for sending For older electrum wallets
[2] for addresses that have been used for receiving For older electrum wallets
[3] for addresses that have been used for receiving current electrum
[4] for addresses that have been used for sending current electrum
note you never expose any priv address or MPK in this scenerio
also how strong is it to reuse a key.
I am thinking particularly of say
http://www.nilsschneider.net/2013/01/28/recovering-bitcoin-private-keys.htmltype attacks
I know have asked this sorta before but want to check again