initial public release

book/assets/mermaid/09-sigtree.md

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+```{mermaid}
+flowchart TD
+    subgraph Certificate
+    pk["Primary Key"]
+    uid["#quot;Alice #lt;alice@example.org#gt;#quot;"]
+    sk["Signing Subkey"]
+
+    usig(["PositiveCertification
+    PrimaryUserID: true"])
+    dksig(["DirectKeySignature"])
+    sksig(["SubkeyBindingSignature
+    KeyFlags: Sign Data
+    EmbeddedSignature: BackSignature"])
+    pk --- usig --> uid
+    dksig --> pk --- dksig
+    pk --- sksig --> sk
+    end
+
+    ds(["Data Signature"])
+    data("Data")
+
+    sk --- ds --> data
+```

book/assets/mermaid/sig-types.md

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+<!--
+SPDX-FileCopyrightText: 2023 The "Notes on OpenPGP" project
+SPDX-License-Identifier: CC-BY-SA-4.0
+-->
+
+```{mermaid}
+%%{ init: { 'flowchart': { 'curve': 'monotoneX' } } }%%
+flowchart LR
+    signature(OpenPGP Signature)
+
+    data(Signature on Data)
+
+    sigcomp(Signature on Component)
+    selfsig(Self-Signature)
+    thirdparty(Third-Party)
+    
+    signature --> confsig & standalone & timestamp & data & sigcomp
+    
+    data --> binary & text
+
+    sigcomp --> selfsig & thirdparty
+    selfsig --> skbind & skrev & uidcert & uidrev & dksig & krev
+    thirdparty --> uidcert & uidrev & dksig
+
+    subgraph Signature Types and Targets
+        standalone[0x02: Standalone]
+        subgraph Signature Packet
+            confsig[0x50: Third-Party Confirmation]
+            timestamp[0x40: Timestamp]
+        end
+        subgraph Data
+            binary[0x00: Binary Data]
+            text[0x01: Canonical Text]
+        end
+        subgraph Primary Key + User ID / Attr. Packet
+            uidcert[
+                0x10: Generic Certification
+                0x11: Persona Certification
+                0x12: Casual Certification
+                0x13: Positive Certification
+            ]
+            uidrev[0x30: Certification Revocation]
+        end
+        subgraph Primary Key
+            dksig[0x1F: Direct-Key Signature]
+            krev[0x20: Key Revocation]
+        end
+        subgraph Primary + Subkey
+            skbind[
+                0x18: Subkey Binding
+                0x19: Primary Key Binding
+            ]
+            skrev[0x28: Subkey Revocation]
+        end
+    end
+```