This is a simple commandline tool for playing with addresses and keys and wallets. I've been working on it for fun, just using ideas seen in other tools.
http://github.com/cecilw/coinsplitThis isn't for split-device generation of keys, as is discussed elsewhere in this forum, but simply a way of doing it with a one-time pad for now. I tried to keep it UNIXy, so you can append lists of keys together and pipe back and forth between the wallet and key backups.
Here's "coinsplit --help", just to give an idea.
coinsplit [wallet.dat] [--generate|--address XXX|--wallet|--import file1 file2] [--split] [keyfile1] [keyfile2]
Generates offline Bitcoin addresses and can split them into halves and import them into wallet.dat files.
** THIS BUILD GENERATES ONLY TESTNET ADDRESSES (which start with an 'm'). **
Examples:
coinsplit --generate new.key
Generates a new offline key and stores it in new.key.
coinsplit --generate --split new.pt1 new.pt2
Generates a new key and splits it into two halves.
coinsplit wallet.dat --address 14Yots3PR3ygt12ksi5MZ36tBdaseQxN46 --split old.pt1 old.pt2
Splits an address from the wallet into two halves.
coinsplit wallet.dat --wallet --split old.pt1 old.pt2
Splits all addresses from the wallet into two halves.
coinsplit wallet.dat --import old.key
Imports the addresses in old.key into the wallet.
coinsplit wallet.dat --import old.pt1 old.pt2
Imports the addresses in the split keys into the wallet.
coinsplit wallet.dat --import old.pt1 old.pt2 old.key
Rejoins two split keys into a single key.
coinsplit --generate --split 1>mail 2>curl
Generates a new key and sends the two halves off.
coinsplit --generate | coinsplit --import
Generate a new key and save the key in the wallet.
This is probably worthless and overlaps other tools, but I had fun making it. Take care.