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Desktop e-mail encryption has been used by organizations for many years to secure sensitive data. Traditional use has been confined to communication between users within a trusted network - either in the same organization or between two organizations that have established a trust relationship by cross-certifying their Public Key Infrastructures (PKI). The advent of the Internet and electronic communication has encouraged more and more organizations to seek methods that will enable them to exchange secure e-mail with users outside of their trusted network. While desktop e-mail encryption users can technically send e-mails to external users, the real-life usability leaves much to be desired. This paper outlines these challenges and approaches that can help streamline the encryption process, making it simple and transparent for desktop encryption users throughout the organization.
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