One threat with Keybase is that an adversary can wipe all data on your account if they just have access to your email (see https://keybase.io/#account-reset htt

One threat with Keybase is that an adversary can wipe all data on your account if they just have access to your email (see https://keybase.io/#account-reset https://keybase.io/#account-reset). I haven't looked into it in detail but Tarsnap might be preferable.