How safe is it to store the
wallet.keys files in a cloud service, email, website, etc? I imagine that it should be just as secure as the passphrases used to encrypt the file. If I understood it correctly, it uses Chacha8, which I believe is very standard, state-of-the-art encryption. Is that correct?
Also, does the file itself leak any other information, like what it is, the wallet address, etc? And are there precautions if renaming it?
EDIT: Added later: If the
wallet.keys file is copied while in use, could the user, by accident, end up saving an unencrypted version of it, or are those files always encrypted, and whenever the wallet uses the keys it does so decrypting a copy of
wallet.keys internally and securely?
EDIT: Added later: Also, are the
wallet files (without the
.keys extension), that store the wallet's transaction history, also encrypted with the same passphrase?