Perfect Forward Secrecy? Diffie-Hellman Ephemeral Key Exchange?

[thecyberd3m0n]

I'm new to crypto, but if I understand as well - apps like Signal never uses same keypair to encrypt more than one message. Could this be achieved by web-crypto implementation? Could you help me with "upgrading" your solution? Also - is it safe for Forward Secrecy to consider user's password (from account) as base for keypair?

I'm trying to re-engineer your app into web-based Signal-like solution. Please help me

[rmhrisk]

Here is a webcrypto based implementation of a double ratchet protocol https://github.com/PeculiarVentures/2key-ratchet

[thecyberd3m0n]

Thank you a lot