Amon2::Auth::Site::LINE uses the String::Random module to generate nonce values. String::Random defaults to Perl's built-in predictable random number generator, the rand() function, which is not cryptographically secure
https://security.metacpan.org/docs/guides/random-data-for-security.html
https://metacpan.org/release/SHLOMIF/String-Random-0.32/source/lib/String/Random.pm#L377