<Li> RFC 3156 MIME Security with OpenPGP </Li> <P> OpenPGP's encryption can ensure secure delivery of files and messages, as well as provide verification of who created or sent the message using a process called digital signing . The open source office suite LibreOffice implemented document signing with OpenPGP as of version 5.4. 0 on Linux . Using OpenPGP for communication requires participation by both the sender and recipient . OpenPGP can also be used to secure sensitive files when they're stored in vulnerable places like mobile devices or in the cloud . </P> <P> With the advancement of cryptography, parts of PGP have been criticized for being dated: </P> <Ul> <Li> The long length of PGP public keys </Li> <Li> Difficulty for the users to comprehend and poor usability </Li> <Li> Lack of ubiquity </Li> </Ul>

What does a public pgp key look like