The Keybase Stellar wallet keeps your Stellar account keys secure yet conveniently availableon your devices.
Summary
To put simply — for each bitcoin address (analogous to a bank account), there is a corresponding private key (analogous to a password) to unlock and access the bitcoins. Now, let's say some genius finds a previously unknown mathematical method to crack private keys faster than brute force. Immortals CO - Rise of Immortals ImmortalsCO is an active American Conquer private server with +7000 active players daily, professionally developed according to the players needs, Experience our PVP/PVE events through the fairest game environment ever with the biggest English-community out there, Available for Windows and Mac OS X.
When you add a Stellar account to your Keybase wallet, the private key and the name of theaccount are encrypted by your client. A bundle of all your Stellar account informationis stored in the Keybase database. A sigchain link is created for your primary account soother users can find a Stellar address to send you payments.
When you need a Stellar private key to make a payment, the client downloads the accountkey bundle from the Keybase servers, decrypts it to get the key, and signs the transaction.The key is then erased from memory as soon as it is no longer needed.
Although the keys are stored on the Keybase servers, the private keys are encrypted witha client-side key that the Keybase servers do not have access to. Having the encryptedkeys on the Keybase servers allows you to have all your Stellar accounts on all your devices.
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Basics
Stellar data for a user consists of:
- Links in the sigchain for your primary Stellar account ID. The most recent one is yourcurrent primary account.
- A bundle of plaintext data, visible to user and server with information about the stellar accounts in the user's keybase wallet. Name: server visible.
- A global bundle of encrypted data containing secret metadata (i.e. the account name) about all the stellar accounts in the user's keybase wallet. Name: user private.
- Per-account encrypted data containing the private stellar account key necessary for signing a transaction. Name: account private.
All Stellar data are stored in the Keybase database. The server readsserver visible when necessary. It cannot decrypt user private or account privateas it does not have the encryption keys necessary. The client will fetch server visible and user privatefrom the server in order to display the wallet accounts, their balances, recent transactions. Tosign a transaction, the client will fetch the account private bundle and discard it after use.
To encrypt this data, the client uses Per-User Keys. We have an entire documenton PUKs, but a simplistic view of it is a seed that is encrypted for all device keysfor a user.
The keys used for encryption are symmetric NaCL keys derived from the user's PUK seed anda constant string specific for these bundles.
For user private bundles, it is:
For account private, it is:
The user private data is packed into binary data via msgpack. This is then sealed with a random nonceand the derived symmetric key. The encrypted data, nonce, version of encrypted data, and generation of thePUK are put into a structure. That structure is packed into binary data via msgpack. The msgpack data isthen encoded into a string via base64.
The account private data is packed into binary data via msgpack. This is then sealed with arandom nonce and the derived symmetric key. The encrypted data, nonce, version of encrypteddata, and generation of the PUK are put into a structure. That structure is packed into binarydata via msgpack. The msgpack data is then encoded into a string via base64.
The server visible bundle structure is packed into binary data via msgpack. It is then encodedinto a string via base64.
When you change which Stellar account is your primary account, a link is inserted in your sigchain.This is so that other users can find which account belongs to you so they can send you Stellar lumens or assets.
Mobile-only mode
As an extra security measure, you can mark any of your Stellar accounts as 'mobile-only'. Since mobiledevice applications have better sandboxing, there is less likelihood of a rogue application interactingwith the keybase app to retrieve your secret keys.
Once you set an account to be mobile-only, the server will only return the encrypted account private bundleto mobile devices.
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To protect against someone with access to one of your desktop devices from provisioning a new mobile deviceand using that to gain access to a mobile-only account, the server will not return the encrypted account privatebundle to any mobile devices that are less than 7 days old. In addition to this, you will receive plenty ofnotifications that a new device was added to your account so that you can take appropriate action if necessary.
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Only a (sufficiently old) mobile device can turn off the mobile-only setting on an account.
Sending to future Keybase users or users without wallets
Once you have a Keybase wallet, you can send XLM to any Keybase user even if he or she hasn't establishedany Stellar accounts, or any future Keybase user.
(Currently, no user on Keybase has proven ownership of the serenawilliams@twitter account, but you canstill send her lumens!)
We do this using what we call a 'relay' payment.
If we detect that the person you are sending to either doesn't have a Stellar account associated withtheir Keybase account or isn't even on Keybase yet, then we create a temporary holding account wherewe send the payment. The private key for the account is encrypted for the 'team' consisting of the senderand the recipient.
In the example above of sending to Serena Williams, the Keybase app would create a new random account,say GCYMBZE2RB5ZMSGB5KVOFR5XOGT6ZKVQ426QUU7RHKI7XWLT5CUIO3YS. It would encrypt the private key for thataccount using a similar method as encrypting chat or KBFS files shared between the sender and serenawilliams@twitter.The encrypted data for the relay account is stored in the Keybase database.
Once the recipient creates an account on Keybase and proves serenawilliams@twitter, her new client will createa Stellar account key pair. It will then notice that there is a relay payment waiting for her, so itwill create an account merge transaction to send all the funds from GCYMBZ... into hernew account.
Until the recipient does this, the sender can cancel the relay payment at any time. When that happens,an account merge transaction sends all the funds from GCYMBZ... back into the sender's account.
Data cleanup
When possible, we expunge any Stellar data from the database.
For example, if you revoke a device, transparently to you, your client will make a new PUK for you andreencrypt your Stellar user private and account private bundles. Once they are posted to theservers, the prior bundle versions (encrypted for your old keys) will be permanently deleted.
When you delete a Stellar account from your wallet, the data is permanently deleted.
Backups
We recommend users store secure backups of their Stellar private keys. By design, we cannot recoverthe private keys. If you lose all your Keybase installs and paper keys, the encrypted keys will notbe decryptable.
Links
Hello 3DXChat Community! 3DXChat 2.7 Build 392 - 64 bit client is available nowImportant:
- It is highly recommended to make a backup of your worlds, saving them into the previous game version file format;
- Build 392 runs on the main server (but you cannot see players from older versions);
- Your worlds and characters will be transferred from 390/391 to 392, but backward compatibility is not guaranteed!
- Make sure that you install 392 in a separate folder from version 390/391, if this is important to you.
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