diff --git a/book/source/01-intro.md b/book/source/01-intro.md
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@@ -18,8 +18,6 @@ With OpenPGP, you can:
 
 To achieve these operations, OpenPGP utilizes a set of [established cryptographic mechanisms](cyrptography_chapter). These building blocks are integrated into OpenPGP's format, which also manages and verifies identities.
 
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 ## Who is the audience for this document?
 
 Three groups of people interact with OpenPGP: