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# Privacy
In order to release Yggdrasil on certain platforms, we are obliged to release a Privacy Policy which discusses information usage within Yggdrasil. This document was last updated on the 9th January 2019.
In order to release Yggdrasil on certain platforms, we are obliged to release a Privacy Policy which discusses information usage within Yggdrasil. This document was last updated on the 14th December 2021.
### Overview
Yggdrasil is a decentralised application with no central point of registration or communication. You **do not** need to register an account to use Yggdrasil, nor do you need to supply any personal information to the developers.
Yggdrasil is a decentralised application with no central point of registration or communication. You **do not** need to register an account to use Yggdrasil, nor do you need to supply any personal information to the application or to the developers.
Yggdrasil deploys **end-to-end encryption** for all traffic crossing the network. This ensures that your traffic will not be readable or modifiable by third parties. The integrity of this encryption is guaranteed only if you take suitable precautions to protect your private keys. Do not share them with anyone.
Yggdrasil deploys **end-to-end encryption** for all traffic crossing the network. This ensures that your traffic will not be readable or modifiable by third parties, including by any other node that is carrying traffic on your behalf. The integrity of this encryption is guaranteed only if you take suitable precautions to protect your private key, which is typically stored in your Yggdrasil configuration file. You must not share it with anyone.
### Network Identity
Your identity on the Yggdrasil Network is derived from your encryption and signing keypairs, which are stored locally on your device. Your public encryption key is used to derive your network IPv6 address, which will be used whenever you send or receive traffic across the Yggdrasil Network.
Your identity on the Yggdrasil Network is derived from your cryptographic keypair, which is generated and stored locally on your device. The public key is used to derive your network IPv6 address, which will be used whenever you send or receive any IP traffic across the Yggdrasil Network.
You can discard your network IPv6 address/network identity and assume a new one at any time by discarding your keypairs and generating a new configuration with fresh keys.
You can discard your network IPv6 address/network identity and assume a new one at any time by discarding your keypair and generating a new one.
### Node Information
Yggdrasil supports node information configuration through the `NodeInfo` configuration section. By default, the `NodeInfo` may also contain information about the version of Yggdrasil being run, on which operating system and architecture. You can choose not to publish this information using the `NodeInfoPrivacy` option in your configuration. Any other `NodeInfo` is entirely optional. You are not obliged to share any information.
Yggdrasil supports publishing node information by means of the `NodeInfo` section in the configuration file. Node information can be queried by any remote node on the network, even if that remote node is not otherwise exchanging IP traffic with your node.
On iOS, this is shown under "Node Info" in the Settings page. Any information entered into this section is published to the network and may be stored by network crawlers or by any other network user. You should therefore not publish any sensitive information in your `NodeInfo`.
By default, the `NodeInfo` may also contain information about the version of Yggdrasil being run as well as the operating system and processor architecture. You can choose not to publish this information by setting the `NodeInfoPrivacy` option in your configuration file. Otherwise, `NodeInfo` is entirely optional and you can leave it empty. On iOS, this is shown under "Node Info" in the Settings page.
You are not obliged to share anything via node information. Any information entered into this section is publicly accessible and may be stored by network crawlers or by any other network user. You should therefore not publish any sensitive information in your `NodeInfo`.
### Peerings
When you establish a peering, your network IPv6 address and public key are made visible to any peers to which you are directly connected. If peering over the Internet or another network, the remote peer may also be able to see your real IP address. If you are concerned about the storage or collection of information from a public node, you should contact the operator of that node.
When you establish a peering, your node's IPv6 address and public key are made visible to any peers to which you are directly connected. If peering over the Internet or another network, the remote peer may also be able to see your real IP address, and these may be logged by the remote node.
If you are concerned about the storage or collection of logging information on a public node, you should contact the operator of that node. If you are in any way concerned about the safety of a public node, or whether a given public node is administered in good faith, you should not attempt to connect to it.
### Yggdrasil for iOS
With regards to our iOS application, information collected through TestFlight or the App Store pertaining to usage demographics and/or crash reports may be made available to the developers of the iOS application by Apple, as outlined in [Apple's own Privacy Policy](https://www.apple.com/uk/legal/privacy/en-ww/).
With regards to our iOS application when distributed via TestFlight or the App Store specifically, information collected through TestFlight or the App Store pertaining to usage demographics and/or crash analytics may be made available to the developers of the iOS application by Apple, as outlined in [Apple's own Privacy Policy](https://www.apple.com/uk/legal/privacy/en-ww/).
No other information is collected. The Yggdrasil application (and the accompanying VPN network extension) itself does not collect any information whatsoever.
No other information is collected. The Yggdrasil application (and the accompanying VPN network extension) itself does not collect any information whatsoever. If you do not wish to share usage information and/or crash analytics as a result of distribution via Apple, you should review the Privacy settings on your device or produce your own build using the source code available.