If you want to mail me in a secure way, then you can use any of the certificates below to encrypt your email. If you receive an email from me personally that is cryptographically signed, it will be signed with one of those.
52CA E7AD D0CF 9EED 0E89 07EB 5558 341A F5BA D1CD, also available under my domain, obtainable by looking up
vanrein.orgin a whois database. (download certificate)