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# Web of Trust 2.0 The Web of Trust is a network of personal contacts where everyone confirms their connections in real life. You only share data securely and encrypted with people you trust. This creates a strong network ofhttps://platform.physik.kit.edu/hedgedoc/s/YptHaOz5z![](https://hack.utopia-lab.org/uploads/ffe60899-d8a3-4f64-877f-27680999655d.png) trust that is built through real encounters and transparency. ## Key Pairs <img src="https://hack.utopia-lab.org/uploads/60c1938f-fc71-4791-8740-f614fff24ed5.svg" alt="Ein Beispielbild" style="float: right; margin-left: 20px;" width="193"> Each user has a key pair consisting of a public and a private key. The private key is stored on the user's device and backed up on paper. The public key will be displayed as a QR code for sharing. ### Key Generation <img src="https://hack.utopia-lab.org/uploads/51410c47-f5f2-4130-8ca4-d39a27d345f7.png" alt="Ein Beispielbild" style="float: left; margin-right: 20px;" width="236"> The user can generate a key pair in the app. They are shown *12 magic words* that they should definitely write down on paper in order to be able to restore their account later or transfer it to other devices. ### Key Sharing <img src="https://hack.utopia-lab.org/uploads/f9e843d7-3b02-4332-9993-466c267e7457.svg" alt="Ein Beispielbild" style="float: right; margin-left: 20px; margin-bottom:20px" width="128"> The public key is displayed to the user in their app as a QR. They show it to people they trust. They can scan it with their app and save it. By scanning each other's QR codes, you can expand your list of friends, create end-to-end encrypted communication channels and expand your personal web of trust. ## Private Data Sharing <img src="https://hack.utopia-lab.org/uploads/db964dbf-b64a-4ef5-b236-c702719a2f2e.svg" alt="Ein Beispielbild" style="float: left; margin-right: 20px;" width="124"> Once you have scanned your friends' public keys, you can share private data with them. You can encrypt events, locations, your profile, offers and requests so that only people whose QR codes (public keys) you have previously scanned and saved can read them. Conversely, you can see the private items of people who trust you. So you weave your own personal *Web of Trust* and receive a map with the entries of all your trusted friends. The data is encrypted end-to-end so nobody outside your own network can read it.