gnupg1 1.4.20-7ubuntu1 (arm64 binary) in ubuntu yakkety

 GnuPG is GNU's tool for secure communication and data storage.
 It can be used to encrypt data and to create digital signatures.
 It includes an advanced key management facility and is compliant
 with the proposed OpenPGP Internet standard as described in RFC 4880.
 .
 GnuPG 1.4 is the "classic" standalone, non-modularized
 version. Please use the gnupg package instead unless you know for
 sure that you need gnupg1.
 .
 The gnupg1 package is built without libcurl to minimize dependencies,
 so it does not support HKPS keyservers. Install the gnupg1-curl
 package if you want to use the keyserver helper tools built with
 libcurl and supporting HKPS.