diff --git a/api/net/sf/briar/api/transport/ConnectionContext.java b/api/net/sf/briar/api/transport/ConnectionContext.java
index 692d69b65c16fb362641b33bc4a5d228406ebe01..314392dc81ac04bb941b07928b22368b30151e8f 100644
--- a/api/net/sf/briar/api/transport/ConnectionContext.java
+++ b/api/net/sf/briar/api/transport/ConnectionContext.java
@@ -1,15 +1,12 @@
 package net.sf.briar.api.transport;
 
 import net.sf.briar.api.ContactId;
-import net.sf.briar.api.protocol.TransportId;
 import net.sf.briar.api.protocol.TransportIndex;
 
 public interface ConnectionContext {
 
 	ContactId getContactId();
 
-	TransportId getTransportId();
-
 	TransportIndex getTransportIndex();
 
 	long getConnectionNumber();
diff --git a/components/net/sf/briar/transport/ConnectionContextImpl.java b/components/net/sf/briar/transport/ConnectionContextImpl.java
index eedbf73fe6063dff6790fe228d30209458878e22..eb52114e3c6155b27a415f14cb77c09336e687ef 100644
--- a/components/net/sf/briar/transport/ConnectionContextImpl.java
+++ b/components/net/sf/briar/transport/ConnectionContextImpl.java
@@ -1,21 +1,18 @@
 package net.sf.briar.transport;
 
 import net.sf.briar.api.ContactId;
-import net.sf.briar.api.protocol.TransportId;
 import net.sf.briar.api.protocol.TransportIndex;
 import net.sf.briar.api.transport.ConnectionContext;
 
 class ConnectionContextImpl implements ConnectionContext {
 
 	private final ContactId contactId;
-	private final TransportId transportId;
 	private final TransportIndex transportIndex;
 	private final long connectionNumber;
 
-	ConnectionContextImpl(ContactId contactId, TransportId transportId,
-			TransportIndex transportIndex, long connectionNumber) {
+	ConnectionContextImpl(ContactId contactId, TransportIndex transportIndex,
+			long connectionNumber) {
 		this.contactId = contactId;
-		this.transportId = transportId;
 		this.transportIndex = transportIndex;
 		this.connectionNumber = connectionNumber;
 	}
@@ -24,10 +21,6 @@ class ConnectionContextImpl implements ConnectionContext {
 		return contactId;
 	}
 
-	public TransportId getTransportId() {
-		return transportId;
-	}
-
 	public TransportIndex getTransportIndex() {
 		return transportIndex;
 	}
diff --git a/components/net/sf/briar/transport/ConnectionDispatcherImpl.java b/components/net/sf/briar/transport/ConnectionDispatcherImpl.java
index ca25c792a6145470ce541d7c3a76c7e8ba160473..3cb09d0e4c22fbceb03dcd8e6482132b0bc210c4 100644
--- a/components/net/sf/briar/transport/ConnectionDispatcherImpl.java
+++ b/components/net/sf/briar/transport/ConnectionDispatcherImpl.java
@@ -62,12 +62,6 @@ public class ConnectionDispatcherImpl implements ConnectionDispatcher {
 			r.dispose(false);
 			return;
 		}
-		if(!t.equals(ctx.getTransportId())) {
-			if(LOG.isLoggable(Level.WARNING))
-				LOG.warning("Connection has unexpected transport ID");
-			r.dispose(false);
-			return;
-		}
 		batchConnFactory.createIncomingConnection(ctx.getTransportIndex(),
 				ctx.getContactId(), r, encryptedIv);
 	}
@@ -112,12 +106,6 @@ public class ConnectionDispatcherImpl implements ConnectionDispatcher {
 			s.dispose(false);
 			return;
 		}
-		if(!t.equals(ctx.getTransportId())) {
-			if(LOG.isLoggable(Level.WARNING))
-				LOG.warning("Connection has unexpected transport ID");
-			s.dispose(false);
-			return;
-		}
 		streamConnFactory.createIncomingConnection(ctx.getTransportIndex(),
 				ctx.getContactId(), s, encryptedIv);
 	}
diff --git a/components/net/sf/briar/transport/ConnectionRecogniserImpl.java b/components/net/sf/briar/transport/ConnectionRecogniserImpl.java
index 6c139c6346438990f2c469e8d1295e9583e79c11..a8745f61e4b94ed93b32184fd9ad7eccb9e66c50 100644
--- a/components/net/sf/briar/transport/ConnectionRecogniserImpl.java
+++ b/components/net/sf/briar/transport/ConnectionRecogniserImpl.java
@@ -82,17 +82,17 @@ DatabaseListener {
 			TransportIndex i = db.getRemoteIndex(c, t);
 			if(i != null) {
 				ConnectionWindow w = db.getConnectionWindow(c, i);
-				calculateIvs(c, t, i, ivKey, w);
+				calculateIvs(c, i, ivKey, w);
 			}
 		}
 	}
 
-	private synchronized void calculateIvs(ContactId c, TransportId t,
-			TransportIndex i, ErasableKey ivKey, ConnectionWindow w)
+	private synchronized void calculateIvs(ContactId c, TransportIndex i,
+			ErasableKey ivKey, ConnectionWindow w)
 	throws DbException {
 		for(Long unseen : w.getUnseen()) {
 			Bytes iv = new Bytes(encryptIv(i, unseen, ivKey));
-			expected.put(iv, new ConnectionContextImpl(c, t, i, unseen));
+			expected.put(iv, new ConnectionContextImpl(c, i, unseen));
 		}
 	}
 
@@ -136,7 +136,7 @@ DatabaseListener {
 			byte[] secret = db.getSharedSecret(c, true);
 			ErasableKey ivKey = crypto.deriveIvKey(secret, true);
 			for(int j = 0; j < secret.length; j++) secret[j] = 0;
-			calculateIvs(c, ctx.getTransportId(), i, ivKey, w);
+			calculateIvs(c, i, ivKey, w);
 		} catch(NoSuchContactException e) {
 			// The contact was removed - clean up when we get the event
 		}
@@ -191,7 +191,7 @@ DatabaseListener {
 				TransportIndex i = db.getRemoteIndex(c, t);
 				if(i != null) {
 					ConnectionWindow w = db.getConnectionWindow(c, i);
-					calculateIvs(c, t, i, ivKey, w);
+					calculateIvs(c, i, ivKey, w);
 				}
 			} catch(NoSuchContactException e) {
 				// The contact was removed - clean up when we get the event
diff --git a/test/net/sf/briar/transport/ConnectionRecogniserImplTest.java b/test/net/sf/briar/transport/ConnectionRecogniserImplTest.java
index d9cf7b8db5552352951999e15ba48a89417b5273..04715419666a07b71b78176b18301f9a0dafaf46 100644
--- a/test/net/sf/briar/transport/ConnectionRecogniserImplTest.java
+++ b/test/net/sf/briar/transport/ConnectionRecogniserImplTest.java
@@ -116,7 +116,6 @@ public class ConnectionRecogniserImplTest extends TestCase {
 		ConnectionContext ctx = c.acceptConnection(encryptedIv);
 		assertNotNull(ctx);
 		assertEquals(contactId, ctx.getContactId());
-		assertEquals(transportId, ctx.getTransportId());
 		assertEquals(remoteIndex, ctx.getTransportIndex());
 		assertEquals(3L, ctx.getConnectionNumber());
 		// Second time - the IV should no longer be expected
diff --git a/test/net/sf/briar/transport/batch/BatchConnectionReadWriteTest.java b/test/net/sf/briar/transport/batch/BatchConnectionReadWriteTest.java
index 06d4e7fc6fb3b4009b07fd8436589198e29806c4..592a46c4873a22a17cd91dc45e81d1a679ac8331 100644
--- a/test/net/sf/briar/transport/batch/BatchConnectionReadWriteTest.java
+++ b/test/net/sf/briar/transport/batch/BatchConnectionReadWriteTest.java
@@ -162,7 +162,6 @@ public class BatchConnectionReadWriteTest extends TestCase {
 		ConnectionContext ctx = rec.acceptConnection(encryptedIv);
 		assertNotNull(ctx);
 		assertEquals(contactId, ctx.getContactId());
-		assertEquals(transportId, ctx.getTransportId());
 		assertEquals(transportIndex, ctx.getTransportIndex());
 		// Create an incoming batch connection
 		ConnectionReaderFactory connFactory =