diff --git a/src/eu/siacs/conversations/persistance/FileBackend.java b/src/eu/siacs/conversations/persistance/FileBackend.java
index 122898b9..dbbf0a10 100644
--- a/src/eu/siacs/conversations/persistance/FileBackend.java
+++ b/src/eu/siacs/conversations/persistance/FileBackend.java
@@ -1,11 +1,15 @@
 package eu.siacs.conversations.persistance;
 
+import java.io.BufferedInputStream;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.FileOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.OutputStream;
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
 
 import android.content.Context;
 import android.graphics.Bitmap;
@@ -16,6 +20,7 @@ import android.util.LruCache;
 
 import eu.siacs.conversations.entities.Conversation;
 import eu.siacs.conversations.entities.Message;
+import eu.siacs.conversations.utils.CryptoHelper;
 
 public class FileBackend {
 
@@ -84,6 +89,7 @@ public class FileBackend {
 				Log.d("xmppService", "couldnt compress");
 			}
 			os.close();
+			message.setBody(this.createSha1(file));
 			return file;
 		} catch (FileNotFoundException e) {
 			// TODO Auto-generated catch block
@@ -112,4 +118,43 @@ public class FileBackend {
 		}
 		return thumbnail;
 	}
+	
+	private String createSha1(final File file) {
+		InputStream fis = null;
+		try {
+			MessageDigest digest = MessageDigest.getInstance("SHA-1");
+			fis = new FileInputStream(file);
+		    int n = 0;
+		    byte[] buffer = new byte[8192];
+		    while (n != -1) {
+		        n = fis.read(buffer);
+		        if (n > 0) {
+		            digest.update(buffer, 0, n);
+		        }
+		    }
+		    fis.close();
+		    return CryptoHelper.bytesToHex(digest.digest());
+		} catch (NoSuchAlgorithmException e) {
+			return null;
+		} catch (FileNotFoundException e) {
+			if (fis!=null) {
+				try {
+					fis.close();
+					return null;
+				} catch (IOException e1) {
+					return null;
+				}
+			}
+		} catch (IOException e) {
+			if (fis!=null) {
+				try {
+					fis.close();
+					return null;
+				} catch (IOException e1) {
+					return null;
+				}
+			}
+		}
+		return null;
+	}
 }
diff --git a/src/eu/siacs/conversations/services/XmppConnectionService.java b/src/eu/siacs/conversations/services/XmppConnectionService.java
index 4dfcff50..cce6882b 100644
--- a/src/eu/siacs/conversations/services/XmppConnectionService.java
+++ b/src/eu/siacs/conversations/services/XmppConnectionService.java
@@ -407,7 +407,6 @@ public class XmppConnectionService extends Service {
 		message.setPresence(presence);
 		message.setType(Message.TYPE_IMAGE);
 		File file = this.fileBackend.copyImageToPrivateStorage(message, uri);
-		Log.d(LOGTAG,"new file"+file.getAbsolutePath());
 		conversation.getMessages().add(message);
 		databaseBackend.createMessage(message);
 		sendMessage(message, null);
diff --git a/src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java b/src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
index a5453443..31b643c0 100644
--- a/src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
+++ b/src/eu/siacs/conversations/xmpp/jingle/JingleConnection.java
@@ -34,6 +34,7 @@ public class JingleConnection {
 	private String responder;
 	private List<Element> candidates = new ArrayList<Element>();
 	private HashMap<String, SocksConnection> connections = new HashMap<String, SocksConnection>();
+	private File file = null;
 	
 	private OnIqPacketReceived responseListener = new OnIqPacketReceived() {
 		
@@ -110,7 +111,8 @@ public class JingleConnection {
 		if (message.getType() == Message.TYPE_IMAGE) {
 			content.setAttribute("creator", "initiator");
 			content.setAttribute("name", "a-file-offer");
-			content.offerFile(this.mXmppConnectionService.getFileBackend().getImageFile(message));
+			this.file = this.mXmppConnectionService.getFileBackend().getImageFile(message);
+			content.offerFile(file,message.getBody());
 			content.setCandidates(this.mJingleConnectionManager.nextRandomId(),this.candidates);
 			packet.setContent(content);
 			Log.d("xmppService",packet.toString());
diff --git a/src/eu/siacs/conversations/xmpp/jingle/stanzas/Content.java b/src/eu/siacs/conversations/xmpp/jingle/stanzas/Content.java
index 27d6b9e3..304656ee 100644
--- a/src/eu/siacs/conversations/xmpp/jingle/stanzas/Content.java
+++ b/src/eu/siacs/conversations/xmpp/jingle/stanzas/Content.java
@@ -15,12 +15,13 @@ public class Content extends Element {
 		super("content");
 	}
 
-	public void offerFile(File actualFile) {
+	public void offerFile(File actualFile, String hash) {
 		Element description = this.addChild("description", "urn:xmpp:jingle:apps:file-transfer:3");
 		Element offer = description.addChild("offer");
 		Element file = offer.addChild("file");
 		file.addChild("size").setContent(""+actualFile.length());
 		file.addChild("name").setContent(actualFile.getName());
+		file.addChild("hash","urn:xmpp:hashes:1").setAttribute("algo", "sha-1").setContent(hash);
 	}
 
 	public void setCandidates(String transportId, List<Element> canditates) {