<ol style="list-style-type: decimal">
<li style="margin: 0cm 0cm 0pt; color: black; text-align: left"> The requirement is to develop a plug-in in Lotus Notes email client that will under request encrypt the emails sent out and decrypt those received emails encrypted with this plug-in.
<li style="margin: 0cm 0cm 0pt; color: black; text-align: left"> The system should work with Lotus Notes Client versions 6.x, 7.x, 8.x.
<li style="margin: 0cm 0cm 0pt; color: black; text-align: left"> The development environment should be C/C++/VC++ with Microsoft Visual Studio. The plug-in program should be extensible to certain functionalities implemented with COM.
<li style="margin: 0cm 0cm 0pt; color: black; text-align: left"> Detailed requirements are specified in subsequent sections and an outlook plug-in with similar functions can be provided for reference.