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Re:Lavaboom: Zero-Access Encrypted Email Service Hosted in G... by yc1010 on Friday May 15, 2015 @02:37PM (#9552713)
I see so this works similar to how blockchain.info site works in the browser, with the server used for encrypted backups and to retrieve blockchain data.

Thanks for answering

Re:Lavaboom: Zero-Access Encrypted Email Service Hosted in G... by pzduniak on Friday May 15, 2015 @02:49PM (#9552802)
We actually based the Lavaboom Sync functionality on blockchain.info's model - the private keys are encrypted using user's plaintext password, while the client only sends the password's hash to the server during authentication.