in src/encrypt.rs [63:69]
fn tag_size(&self) -> usize {
match self {
COSEAlgorithm::AesGcm96_128_128 => 16,
COSEAlgorithm::AesGcm96_128_192 => 16,
COSEAlgorithm::AesGcm96_128_256 => 16,
}
}