If you want to send an encrypted message to someone, you would encrypt it using their public key. You can encrypt a message with either key, then decrypt it with the other. The choice of which to use depends on the scenario, as seen below. You should make your public key public (anyone can see it), but keep your private key private (only you can see it). These keys are mathematically related, but you cannot derive one from the other. You first generate a public and private key using a program on your computer. This is a very quick lesson in public key cryptography, which is used by PGP and GPG. With the money, Koch was able to hire a full-time developer and continue work on GPG. After the article went viral, Koch received over $137k in donations from users, $60k from the Linux Foundation, and recurring donations of $50k per year from both Facebook and Stripe. In February 2015, ProPublica published an article outlining Koch’s labor of love with GPG. In fact, Koch only earned an average of about $25k per year working full time on GPG, all while supporting a wife and daughter. However, since its creation, it has been maintained almost single-handedly by Koch, who relied only on donations and limited funding from the German government. GPG became the de facto standard encryption software, powering almost all of the underlying encryption software that world and web depended on. It was designed to be an open source, OpenPGP compatible version of PGP. GNU Privacy Guard (GnuPG or GPG), now part the GNU Project, was created by Werner Koch in 1997. Today, any programs that use the OpenPGP standard (like PGP and GPG) will be cross-compatible. In 1997, Zimmermann proposed to the Internet Engineering Task Force (IEFT) the standard called OpenPGP. OpenPGP #īecause of PGP’s importance, Zimmermann decided that an open standard needed to be created so that others could write/use code that would interact with PGP. Today, PGP is no longer considered a weapon, but still cannot be exported to a specific list of individuals/countries. However, Zimmerman was able to circumvent this by publishing the entire source code of PGP in a physical book (that could be scanned with OCR and recompiled into source code), since the export of books was protected by the First Amendment. At the time, cryptography systems with keys over 40 bits were considered a weapon, and since PGP used 128 bit keys, Zimmerman was in violation of the law. Zimmermann formed PGP Incorporated, which was acquired serveral times and is now owned by Symantec.įun fact - in 1993 the US government charged Zimmerman with “munitions export without a license”. Pretty Good Privacy (PGP) was a program created to encrypt/decrypt data in 1991 by Phil Zimmermann. Put on your tinfoil hats, boys and girls! Today, we’re talking about security, encryption, and GPG! PGP vs OpenPGP vs GPG # PGP #
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