Off-site backup of “login.keychain” I’m using the Keychain.app to manage all my (website) passwords, and I am also using the “Password assistant” to generate secure random passwords.

But obviously I’m paranoid that my laptop is lost or damaged and that I’m using all my passwords so I’m searching for a secure, comfortable backup option.

In particular, the backup has to be immediate (as soo as I’m adding a new key or editing an existing one). This can be done by registering a launch agent.

Furthermore, the storage should be off-site. Ideally, this would mean Dropbox. But I’m paranoid: their storage may be encrypted but they theoretically still have access to my data.

Now, the keychain is encrypted anyway. But is this encryption secure? Can I just rely on this and upload the backup to an essentially public storage?
1Password is a product that may interest you.  Seems to tick all the boxes in terms of speed, off-site and secure storage.  Plus it allows you to use it on all your devices too (iPhone, iPad etc).