Whenever possible, use the following contact methods; they allow verification
to mitigate man-in-the-middle attacks, have high security, and reasonable
keys for each contact method to verify my devices.
Note: Verification does not verify a person, only their devices, and can be defeated via coercion or other force.
If metadata leakage is an issue for you, you can use the following contact methods.
Note: These services do not have verification functionality and will be treated as less secure; unless you really need to use these services, use a preferred method instead.