http://walletdvl5avrmoxk2fwsf5b76zkmbkoo3r6kqeesq5hsgnq7xhbciad.onion/hd-wallet
Each child key also gets a deterministically-generated seed from its parent, called a chain code, so the compromising of one chain code doesn’t necessarily compromise the integer sequence for the whole hierarchy, allowing the master chain code to continue being useful even if, for example, a web-based public keydistribution program gets hacked.