Wallet file encryption:

- a keypair is derived from the wallet password
 - only the public key is retained in memory
 - wallets must opened and closed explicitly with the daemon

gui/text.py

@@ -1,6 +1,7 @@
 import tty, sys
 import curses, datetime, locale
 from decimal import Decimal
+import getpass
 
 from electrum.util import format_satoshis, set_verbosity
 from electrum.util import StoreDict
@@ -21,7 +22,8 @@ class ElectrumGui:
         if not storage.file_exists:
             print "Wallet not found. try 'electrum create'"
             exit()
-
+        password = getpass.getpass('Password:', stream=None) if storage.is_encrypted() else None
+        storage.read(password)
         self.wallet = Wallet(storage)
         self.wallet.start_threads(self.network)
         self.contacts = StoreDict(self.config, 'contacts')