--- title: Key Phrases, Gordian tags: pieces robots: noindex, nofollow --- ## Products * The Gordian System * GordianWallet (iOS) * GordianServer (MacOS, Linux)) * Bitcoin Standup technology * GordianSigner (Android, iOS, MacOS) ### Related Products * LetheKit ### The Publisher * Blockchain Commons ## System Elements *a family of apps.* A group of applications meant to work together. *full node.* A full Bitcoin node. *mobile wallet.* A Bitcoin wallet deployed on a mobile device. * *hot account.* An account where your mobile wallet holds the master key and your node holds a watch-only key. * *warm account.* An account protected with a 2-of-3 multisig. One key is held on your device and you are given copies of two keys for offline storage. One of those is then imported into your node, to allow your node and your wallet to work together to sign transactions. *signer.* An app focused solely on signing PSBTs and other transactions. ### System Features *BIP39 mnemonic codes.* A backup feature for keys that generates 12 keys that can be easily recorded elsewhere. *descriptors.* A data format for transferring keys and addresses via a ordered statement. *lifehash.* A visual image uniquely depicting your account. *multi-sigs.* A transaction signed by multiple parties. *PSBTs.* Partially Signed Bitcoin Transactions. A transaction creation format that supports airgapped architectures. *QR Codes.* A data format for transferring PSBTs, seeds, and other Bitcoin information via photographs of a graphic image. *Quick Connect.* A standard API for connecting a node and a wallet. Generates a QR code. *Tor.* or *Onion Service.* A secure method for interacting with your full node. ## Advantages *airgapped.* Seeds and private keys can be stored safely on your mobile device, which tends to have more robust protections than a fully networked computer; if that's insufficient, they can be stored entirely off-network. *safe.* You always have BIP39 mnemonic backups of your keys. *self-sovereign.* The user can be in control of all aspects of his Bitcoin system, including the node and the wallet. *secure.* Keys are stored solely on the mobile device for hot wallets, while for a warm wallet, one key is held on the mobile device and another on the user's selected node. ## Other Phrases *puts you in control* *safe, secure, and self-sovereign.* *we give you the tools* *you decide* or *self-sovereign means you decide*