diff --git a/src/cmd_sshpubkey.rs b/src/cmd_sshpubkey.rs
index 29ced66..1dfe048 100644
--- a/src/cmd_sshpubkey.rs
+++ b/src/cmd_sshpubkey.rs
@@ -61,6 +61,15 @@ impl Command for CommandImpl {
         information!("ECDSA public key: {}", hex::encode(&ec_key_point));
         println!();
 
+        // ECDSA SSH public key format:
+        // string ecdsa-sha2-[identifier]
+        // byte[n] ecc_key_blob
+        //
+        // ecc_key_blob:
+        // string [identifier]
+        // string Q
+        //
+        // [identifier] will be nistp256 or nistp384
         let mut ssh_pub_key = vec![];
         ssh_pub_key.write_string(&format!("ecdsa-sha2-{}", ssh_algorithm).as_bytes());
         let mut ecc_key_blob = vec![];