kgpg 4:15.12.3-0ubuntu1 (arm64 binary) in ubuntu xenial

 Kgpg manages cryptographic keys for the GNU Privacy Guard, and can encrypt,
 decrypt, sign, and verify files. It features a simple editor for applying
 cryptography to short pieces of text, and can also quickly apply cryptography
 to the contents of the clipboard.
 .
 This package is part of the KDE Utilities module.