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4+title: Cryptographic Storage
7+# Cryptographic Storage
9+We've moved our public-key infrastructure to the Ethereum blockchain. This means
10+that Urbit ship-holders need to generate and secure Ethereum addresses
11+for executing on-chain actions: transferring ownership, spawning child
12+ships, setting encryption and authentication keys for interacting with the Urbit
13+network, and so on. We are using a Type 1 chain of Type 2 hierarchical
14+deterministic (HD) wallets to mirror the affordances of ownership and proxy
15+rights. Our HD wallet solution is described in detail in
16+[this Urbit Proposal](https://urbit.org/).