The Mobile Web Security Bootstrap (MWSB) API can be used to establish shared secret keys between an application server and a mobile web client. The key can be used to secure mobile applications that, for instance, require authentication, data confidentiality and integrity, and single sign on.

1. Mobile Web
Security
Bootstrap
A labs.ericsson.com API
http://labs.ericsson.com/apis/mobile-web-security-bootstrap/

2. ericsson labs APIs
Maps & positioning communication security
Mobile Mobile SMS Send & Mobile Group Voice Mobile Web Security Oauth2
Location Maps Receive Push Mixer Bootstrap CAPTCHA Framework
Web Async Identity Management Key Management
Maps Voice Framework Service
Web technologies NFC & sensors User & network information
Web Web Background Mobile Sensor Mobile Network
Tag Tool
Connectivity EventSource Service
Actuator Link Identification Probe
Web Device Mobile Network
Distributed Web Real-Time
Real- Sensor Networking
Connectivity Shared Memory Communication Application Platform Look-up
Look-
Machine learning Media and graphics
Face
Cluster Text-to-Speech
Text- to-
Detector
Constructor
© Ericsson AB 2010 | Page 2

3. Mobile Web Security
Bootstrap
› The SIM is commonly used for getting cellular access,
mobile connectivity and access to some mobile services
› The SIM proven security features can also be used for
securing any mobile web applications
› This service provides an API for establishing a secret key
between mobile web clients and web applications
© Ericsson AB 2010 | Page 3

4. Why Mobile Web Security
Bootstrap?
› Security – As secure as SIM
› Standard – Based on industry standard
› Acceptance – Many standardized applications
› Convenience – Transparent to users
› Extensibility – Any applications can exploit the SIM
© Ericsson AB 2010 | Page 4

5. Main Features
› Based on 3GPP industry standard
Generic Bootstrapping Architecture
› Client and server Web/Java APIs available and
documented with examples
› HTTP interfaces
› Soft client available to allow focusing on the development
of the network side of the web application
© Ericsson AB 2010 | Page 5

6. Overview
Mobile Web
› Ub interface – Mobile client uses Network
Application Server
Network
Application
API to bootstrap a master secret Application
key
Ua Zn
› Ua interface – Mobile Web Client
uses API to derive application- * HTTP
specific master key
Mobile
› Zn interface – Mobile Web Bootstrap
Web Client
Application Server uses API to Ub Server
obtain the corresponding Bootstrap
application-specific master key Client HTTP
At the end of the API usage Subscriber
transactions the client and server Database
share an application-specific
secret-key Mobile Web Client MWSB
Mobile Web
Security Bootstrap
© Ericsson AB 2010 | Page 6

7. Java Client API
› Soft Client API provided for focusing on server application
› Example showing how to establish a shared key
// Create soft client with user identity and permanent key
GbaClient softclient = new GbaClient(myID, myKey);
// Bootstrap client with master key. btid is the handler.
String btid = softclient.bootstrap();
// Derive application-specific key to be shared with app server
byte[] appKey = softclient.getKsNaf(app_Fqdn);
// Use the app key for HTTP Digest Authentication
boolean authResult = runUaHttpDigest(app_URL, btid, appKey);
© Ericsson AB 2010 | Page 7

8. Java Server API
› API towards mobile client and API towards MWSB
› Servlet example showing how to establish a shared key
// Applicatin Servlet doGet()
// Create application context with Labs authorization API key
GbaNaf app = new GbaNaf(myFqdn, myApiKey)
// Parse GET authorization headers & fetch btid (key Handler)
Authorization authz = Authorization.parse(authorizationHeader);
String btid = authz.getUsername();
// Derive the application-specific key to be shared with client
appKey = app.getKsNaf(btid);
// Use the shared key to authenticate the mobile client
Digest.verify(authorization, appKey)
© Ericsson AB 2010 | Page 8

9. Possible applications
Identity Management
Authentication Single Sign-On
Integrity Confidentiality
Key Management
© Ericsson AB 2010 | Page 9

10. © Ericsson AB 2010 | Page 10