Add 78 PDF security and signing code examples

[agent-aspose-pdf-examples]

securing-and-signing-pdf

78 code example(s) for the securing-and-signing-pdf category.
Target: Aspose.PDF for .NET 26.8.0

Examples

#	Example	Difficulty
1	Apply PKCS#7 Detached Digital Signature to PDF	intermediate
2	Batch Sign PDFs with Certificate and Timestamp	intermediate
3	Encrypt PDF with Password and Disable Printing	beginner
4	Encrypt PDF with Owner Password and Allow High‑Resolution Printing	beginner
5	Decrypt PDF with Owner Password using Aspose.Pdf	beginner
6	Add Visible Digital Signature to Second Page of PDF	intermediate
7	Add Invisible Digital Signature to PDF	intermediate
8	Extract Signature Field Metadata from PDF	intermediate
9	Extract Images from a Signed PDF and Save as PNG	intermediate
10	Remove Digital Signature from PDF	intermediate
11	Sign PDF with Smart Card Certificate	intermediate
12	Sign PDF with Smart Card Certificate (No PIN Prompt)	intermediate
13	Custom Security Handler for Logging PDF Access Attempts	intermediate
14	Restrict Copy-Paste in PDF with Encryption	beginner
15	Sign PDF with Timestamp from TSA	intermediate
16	Validate PDF Digital Signature with Certificate Chain Check	intermediate
17	Validate PDF Signature Using OCSP	intermediate
18	Validate PDF Signature Using CRL Revocation Checking	intermediate
19	Extract PDF Signature Signing Time and Convert to UTC	intermediate
20	Extract Certificate Chain from PDF Signature and Save as DER Files	intermediate
21	Sign PDF with Reason, Contact Info, and Location	intermediate
22	Sign PDF with Custom Image Appearance	intermediate
23	Create a Certified PDF Signature Allowing Page Additions	intermediate
24	Sign PDF and Lock Specific Form Fields	intermediate
25	Sign PDF and Enforce Read‑Only Mode	intermediate
26	Encrypt PDF with AES‑256 and Set User/Owner Passwords	beginner
27	Encrypt PDF with RC4 128-bit and Restrict Editing	beginner
28	Decrypt PDF and Extract Embedded Images	intermediate
29	Decrypt PDF and Update Metadata with Aspose.Pdf	intermediate
30	Batch Encrypt PDFs Using File Name Passwords	intermediate
31	Batch Decrypt Password-Protected PDFs Using a Lookup Table	intermediate
32	Batch Sign PDFs with Title-Based Certificate Selection	intermediate
33	Batch Encrypt and Digitally Sign PDFs	intermediate
34	Extract Signature Field Names and Page Numbers from PDF	beginner
35	Retrieve Reason and Location from PDF Signatures	beginner
36	Sign PDF and Embed Custom XMP Metadata	intermediate
37	Sign PDF with PKCS#7 and embed custom XML signature	intermediate
38	Sign PDF and Lock Signature Field	intermediate
39	Sign PDF with Incremental Updates for Future Signatures	intermediate
40	Sign PDF and Prevent Additional Signatures	intermediate
41	Encrypt PDF with Print‑Only Permission	beginner
42	Encrypt PDF and Allow Copying While Blocking Printing	beginner
43	Encrypt PDF with Printing and Copying Permissions	beginner
44	Encrypt PDF and Disable Content Extraction	beginner
45	Decrypt PDF, Extract Images, and Re‑encrypt with New Owner Password	intermediate
46	Download PDF, Apply PKCS7 Signature, and Upload to Azure Blob	intermediate
47	Encrypt PDF with Password (AES‑256)	beginner
48	Sign PDF with Windows Store Certificate using Aspose.Pdf	intermediate
49	Sign PDF with a Certificate using Aspose.Pdf	intermediate
50	Sign PDF using a hardware token (PKCS#11)	intermediate
...	28 more examples

Key APIs Used

Aspose.Pdf.Annotations.Annotation, Aspose.Pdf.Annotations.AnnotationCollection.Delete, Aspose.Pdf.Annotations.TextAnnotation, Aspose.Pdf.CryptoAlgorithm, Aspose.Pdf.DigestHashAlgorithm, Aspose.Pdf.Document, Aspose.Pdf.Document(string, string), Aspose.Pdf.Document.ChangePasswords, Aspose.Pdf.Document.Decrypt, Aspose.Pdf.Document.Decrypt(), Aspose.Pdf.Document.EnableSignatureSanitization, Aspose.Pdf.Document.Encrypt, Aspose.Pdf.Document.Flatten, Aspose.Pdf.Document.Form, Aspose.Pdf.Document.Form.Add, Aspose.Pdf.Document.Form.SignaturesAppendOnly, Aspose.Pdf.Document.Info, Aspose.Pdf.Document.Metadata, Aspose.Pdf.Document.OptimizeResources, Aspose.Pdf.Document.RemovePdfUaCompliance, Aspose.Pdf.Document.RemovePdfaCompliance, Aspose.Pdf.Document.Save, Aspose.Pdf.Document.Save(), Aspose.Pdf.DocumentInfo, Aspose.Pdf.Form, Aspose.Pdf.Form.Add, Aspose.Pdf.Forms.DigestHashAlgorithm, Aspose.Pdf.Forms.ExternalSignature, Aspose.Pdf.Forms.Field, Aspose.Pdf.Forms.Form
(+49 more)

Tags

Aspose.Pdf C# PKCS7 add-pages aes-256 aes256 annotation append-only aspnet aspose aspose-pdf aspose.pdf azure-blob batch batch processing batch-processing c# certificate certificate-chain certification

Difficulty Distribution

• beginner: 16 example(s)
• intermediate: 62 example(s)

Pipeline Stages

• Baseline (1st try): 32
• LLM Fix: 30
• Regen with KB: 10
• Final LLM Recovery: 6

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