Do not store encryption keys in the frontend.

[Samyak2]

The issue

• Currently, when the user selects a chat, along with the messages even the public and private keys are taken from the database
• These keys are stored as global variables in JS.

Possible solutions

• One possible solution is to query the keys as and when required i.e., get the public key when sending a message and private key when receiving one.
• If there is a better way to do this, please mention them.