diff --git a/__crypto/yubikey-rs-demo/src/main.rs b/__crypto/yubikey-rs-demo/src/main.rs
index 1b3f78b..9b3df4c 100644
--- a/__crypto/yubikey-rs-demo/src/main.rs
+++ b/__crypto/yubikey-rs-demo/src/main.rs
@@ -2,6 +2,7 @@ use p256::{ecdh::EphemeralSecret, EncodedPoint, PublicKey};
 use p256::elliptic_curve::sec1::{FromEncodedPoint, ToEncodedPoint};
 use rand::rngs::OsRng;
 use rust_util::{failure_and_exit, information, warning, XResult};
+use yubikey::certificate::PublicKeyInfo;
 use yubikey::Context;
 use yubikey::piv::{AlgorithmId, decrypt_data, metadata, RetiredSlotId, SlotId};
 
@@ -60,7 +61,20 @@ fn main() -> XResult<()> {
     let meta_result = metadata(&mut yubikey, SlotId::Retired(RetiredSlotId::R1));
     match meta_result {
         Ok(meta) => {
-            information!("{:?}", meta)
+            information!("{:?}", meta);
+            if let Some(public_key) = &meta.public {
+                match public_key {
+                    PublicKeyInfo::Rsa { algorithm, pubkey } => {
+                        information!("RSA, {:?}, {:?}", algorithm, pubkey);
+                    }
+                    PublicKeyInfo::EcP256(pubkey) => {
+                        information!("EC-P256, {}", hex::encode(pubkey.as_bytes()));
+                    }
+                    PublicKeyInfo::EcP384(pubkey) => {
+                        information!("EC-P384, {}", hex::encode(pubkey.as_bytes()));
+                    }
+                }
+            }
         }
         Err(e) => warning!("Get slot meta failed: {}", e)
     }