Add: How to verify the authenticity of our files and check virus scans

Signed-off-by: nopeitsnothing <no@anonymousplanet.org>

docs/guide/index.md

@@ -11344,7 +11344,7 @@ If you want to compare an older version of the PDF with a newer version, conside
 
 - <https://draftable.com/compare>
 
-If you want to compare the older version of the ODT format with a newer version, use the LibreWriter compare features as explained here: <https://help.libreoffice.org/7.1/en-US/text/shared/guide/redlining_doccompare.html> <sup>[[Archive.org]](https://web.archive.org/web/https://help.libreoffice.org/7.1/en-US/text/shared/guide/redlining_doccompare.html)</sup>
+<!-- If you want to compare the older version of the ODT format with a newer version, use the LibreWriter compare features as explained here: <https://help.libreoffice.org/7.1/en-US/text/shared/guide/redlining_doccompare.html> <sup>[[Archive.org]](https://web.archive.org/web/https://help.libreoffice.org/7.1/en-US/text/shared/guide/redlining_doccompare.html)</sup> -->
 
 # Appendix A7: Crypto Swapping Services without Registration and KYC
 

docs/verify/index.md

@@ -0,0 +1,123 @@
+---
+title: "Verify"
+description: How to verify the authenticity of our files and check virus scans
+---
+
+# PDF Verification Guide
+
+## Files Provided
+
+For each PDF release, you'll receive:
+
+- **PDF file** (`thgtoa.pdf` or `thgtoa-dark.pdf`) - The actual document
+- **Signature file** (`.sig`) - GPG detached signature for authenticity verification
+- **Hash file** (`.sha256`) - SHA256 checksum for integrity verification
+
+## Quick Verification
+
+### Using Python Script (Recommended)
+
+```bash
+# Verify everything (hashes, signatures, and optionally VirusTotal)
+python scripts/verify_pdf.py --all
+
+# Only verify hashes
+python scripts/verify_pdf.py --hashes
+
+# Only verify GPG signatures
+python scripts/verify_pdf.py --signatures
+
+# Check VirusTotal scan status (requires VT_API_KEY environment variable)
+python scripts/verify_pdf.py --vt
+```
+
+### Manual Verification
+
+#### 1. Verify SHA256 Hash
+
+**Linux/macOS:**
+```bash
+cd /path/to/repo
+sha256sum -c sha256sum-light.txt
+```
+
+**Windows (PowerShell):**
+```powershell
+Get-FileHash -Algorithm SHA256 export\thgtoa.pdf | Select-Object Hash
+# Compare with the hash in thgtoa.pdf.sha256
+```
+
+#### 2. Verify GPG Signature
+
+First, import the public key:
+```bash
+gpg --import pgp/anonymousplanet-master.asc
+```
+
+Then verify the signature:
+```bash
+gpg --verify export/thgtoa.pdf.sig export/thgtoa.pdf
+gpg --verify export/thgtoa-dark.pdf.sig export/thgtoa-dark.pdf
+```
+
+Expected output for successful verification:
+```
+gpg: Signature made [date]
+gpg:                using RSA key [key-id]
+gpg: Good signature from "[owner]"
+```
+
+#### 3. Check VirusTotal Status
+
+Visit the VirusTotal report links (automatically generated in release notes):
+- Light mode: `https://www.virustotal.com/gui/file/[hash]`
+- Dark mode: `https://www.virustotal.com/gui/file/[hash]`
+
+Or use the Python script with API key:
+```bash
+export VT_API_KEY=your_vt_api_key
+python scripts/verify_pdf.py --vt
+```
+
+## Automated Verification in CI/CD
+
+The GitHub Actions workflows automatically:
+
+1. **Build PDFs** from MkDocs source
+2. **Generate SHA256 hashes** and save to root directory
+3. **Sign files with GPG** using the repository's private key
+4. **Scan with VirusTotal** and update release notes
+5. **Create releases** with all verification artifacts
+
+## Security Best Practices
+
+1. **Always verify signatures** before opening PDFs from untrusted sources
+2. **Check hashes** to ensure files weren't corrupted during download
+3. **Review VirusTotal results** for any suspicious detections
+4. **Import keys securely** - verify key fingerprints with the project maintainers
+5. **Keep verification scripts updated** to match current security standards
+
+## Troubleshooting
+
+### "Good signature" but wrong owner?
+- Ensure you imported the correct public key
+- Check the key fingerprint matches the official one from the repository
+
+### Hash mismatch?
+- Re-download the file (corruption during transfer)
+- Verify you're checking against the correct hash file
+- Check for disk errors on your system
+
+### GPG not found?
+- Install GPG: `sudo apt install gnupg` (Debian/Ubuntu) or `brew install gnupg` (macOS)
+- On Windows, use [Gpg4win](https://www.gpg4win.org/)
+
+## Key Information
+
+**Signing Key:** Anonymous Planet Master Key  
+**Key ID:** See `pgp/anonymousplanet-master.asc` for details  
+**Fingerprint:** Verify from the repository's official documentation  
+
+---
+
+*For questions or issues with verification, please open an issue on GitHub.*