Chapter 4 Application Deployment For Mobile; Introduction; Security; Application Security - Motorola MC75A Integrator Manual

CHAPTER 4 APPLICATION DEPLOYMENT

Introduction

This chapter describes new features in Windows Mobile 6 including new security features, how to package
applications, and procedures for deploying applications onto the MC75A.

Security

The MC75A implement a set of security policies that determine whether an application is allowed to run and, if
allowed, with what level of trust. To develop an application, you must know the security configuration of the
device, and how to sign an application with the appropriate certificate to allow the application to run (and to run
with the needed level of trust).

Application Security

Application security controls the applications that can run on the MC75A.
•
Trusted - All applications must be digitally signed by a certificate on the MC75A.
•
Prompted - User is prompted to allow unsigned applications to run.
•
Open - All applications run.
Developers can include their own certificates and provision the device to "trusted."

Digital Signatures

Digital signatures provide a way to authenticate the author of EXEs, DLLs, and packages. Digitally signed
applications give users confidence that an application comes from where they think it comes from. For
example, if an end-user downloads an update package from the internet that is digitally signed with Motorola's
software certificate, they are assured that the package is authentic and that it was created by Motorola. By
enforcing the use of digital signatures, users can also prevent malicious applications from executing on the
MC75A. For example, users can provision the MC75A to only execute "trusted" applications (digitally signed).
Motorola ships all Windows Mobile 6 based products in an "open" state, which means all signed and unsigned
applications should work. However, customers can still reconfigure their MC75As to operate in the "trusted"
FOR MOBILE 6