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book/source/01-intro.md
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@ -13,15 +13,13 @@ This text is *not* intended as a guide for end-users of OpenPGP-related software
## What is OpenPGP?
OpenPGP is an open standard for cryptographic operations. It is a system based on well-understood cryptographic building blocks. OpenPGP supports the secure delivery of files and messages between a sender and a recipient as well as verification of the sender. OpenPGP is an outgrowth of the ["Pretty Good Privacy (PGP)"](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) encryption program and has many widely used and [interoperable implementations](interop_section).
OpenPGP is an open standard for cryptographic operations. It is a system based on well-understood [cryptographic building blocks](cyrptography_chapter). OpenPGP supports the secure delivery of files and messages between a sender and a recipient. It also addresses identities and their verification. OpenPGP is an outgrowth of the ["Pretty Good Privacy (PGP)"](https://en.wikipedia.org/wiki/Pretty_Good_Privacy) encryption program and has many widely used and [interoperable implementations](interop_section).
With OpenPGP, you can:
- [Encrypt](encryption_chapter) and [decrypt](decryption_chapter) messages
- [Sign](signing_data) and [verify](verification_chapter) data
- [Issue certifications and examine statements](component_signatures_chapter) about keys and identities, similar to the role of a Certificate Authority in validating identities.
To enable these operations, OpenPGP utilizes a set of [established cryptographic mechanisms](cyrptography_chapter). These building blocks are integrated into OpenPGP's standard, which also addresses identities and their verification.
- [Issue and validate certifications](component_signatures_chapter) about keys and identities, similar to the role of a Certificate Authority in validating identities.
## Who is the audience for this document?