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OpenPGP, on the other hand, doesn’t rely on a centralized trusted authority. These are referred to as CAs, or Certificate Authorities. Using S/MIME, the user obtains the certificate and keypair from a centralized trusted authority. That difference is in how you get your public/private keypair.
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The software never converts the binary data into ASCII. Your binary files stay right the way they started.Īnother key difference between S/MIME and OpenPGP is more apparent to you, the user. On the other hand, OpenPGP wraps the text and any binary attachments in “ASCII Armor,” an encoding layer. On the recipient’s end, software decodes the ASCII into text or binary files. Your email software transmits nearly everything as ASCII. S/MIME utilizes a standard way of putting arbitrary data into your email, with a definition of what type of information is there. Key Differences Between S/MIME and OpenPGPįrom a technical standpoint, S/MIME and OpenPGP function pretty differently.
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How Secure Email Worksīoth methods use Public Key Cryptography to digitally sign, encrypt, and then decrypt your email. You probably know of this one in the form of OpenPGP. Another is PGP, which stands for Pretty Good Privacy. One of those is Secure/Multipurpose Internet Mail Extensions, or S/MIME, which is what Apple Mail uses. Groups came up with several standards to accomplish this.
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