Symantec Encryption Desktop provides individuals a simple, easy-to-use desktop encryption solution to automatically protect confidential communications and digitally stored information with an integrated solution based on strong, broadly accepted security technology.
PGP Desktop incorporates PGP Universal technology to provide automatic encryption, decryption, digital signatures, verification, and recipient key lookup, making it appropriate for both novice and power users. PGP Desktop secures private email, selected files, and AOL Instant Messenger (AIM) and iChat traffic. Includes Unicode support, S/MIME interoperability, PGP Global Directory integration, significantly improved compression, and cross-platform compatibility with Windows.
Note: for a full list of changes you can read this document
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