diff --git a/libp2p-peer/src/lib.rs b/libp2p-peer/src/lib.rs
index a798abe6..ee11532b 100644
--- a/libp2p-peer/src/lib.rs
+++ b/libp2p-peer/src/lib.rs
@@ -1,19 +1,27 @@
 extern crate base58;
 
+use std::fmt;
 use base58::ToBase58;
 
 /// A PeerId is a reference to a multihash
 /// Ideally we would want to store the Multihash object directly here but because
 /// the multihash package is lacking some things right now, lets store a reference to
 /// some bytes that represent the full bytes of the multihash
-pub struct PeerId<'a> {
+#[derive(PartialEq, Eq, Hash, Debug, Clone)]
+pub struct PeerId {
 	/// Rereference to multihash bytes
-	multihash: &'a [u8]
+	multihash: Vec<u8>
 }
 
-impl<'a> PeerId<'a> {
+impl fmt::Display for PeerId {
+	fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+		write!(f, "{}", self.to_base58())
+	}
+}
+
+impl PeerId {
 	/// Create a new PeerId from a multihash
-	pub fn new(mh: &'a [u8]) -> PeerId<'a> {
+	pub fn new(mh: Vec<u8>) -> PeerId {
 		PeerId { multihash: mh }
 	}
 
@@ -34,7 +42,14 @@ mod tests {
 	#[test]
 	fn peer_id_produces_correct_b58() {
 		let multihash_bytes = encode(Hash::SHA2256, b"hello world").unwrap();
-		let peer_id = PeerId::new(&multihash_bytes);
+		let peer_id = PeerId::new(multihash_bytes);
 		assert_eq!(peer_id.to_base58(), "QmaozNR7DZHQK1ZcU9p7QdrshMvXqWK6gpu5rmrkPdT3L4");
 	}
+
+	#[test]
+	fn string_key_concatenates_correctly() {
+		let multihash_bytes = encode(Hash::SHA2256, b"hello world").unwrap();
+		let peer_id = PeerId::new(multihash_bytes);
+		assert_eq!(peer_id.string_key("hello"), "QmaozNR7DZHQK1ZcU9p7QdrshMvXqWK6gpu5rmrkPdT3L4/hello");
+	}
 }