liboath0 binary package in Ubuntu Focal arm64

 The OATH Toolkit makes it easy to build one-time password
 authentication systems. It contains shared libraries, command line
 tools and a PAM module. Supported technologies include the
 event-based HOTP algorithm (RFC4226) and the time-based TOTP algorithm
 (RFC6238). OATH stands for Open AuTHentication, which is the
 organization that specify the algorithms. For managing secret key
 files, the Portable Symmetric Key Container (PSKC) format described in
 RFC6030 is supported.
 .
 This package includes the Liboath shared library that is used by
 applications. You normally don't need to install it manually.

Source package