PDF Hash Embedding: Digital Asset Protection and Document Verification

The security and integrity of digital documents are critical, especially for financial and legal documents. Senetyaz provides digital asset protection for your promissory note PDFs by embedding SHA-256 hash into them. In this article, we explain in detail what this feature is, how it works, and why it's important.

What is Hash and Why is it Important?

Hash can be thought of as a digital fingerprint of a file or data. A unique hash value is generated for each document, and this value changes completely even with the smallest change in the document. SHA-256 (Secure Hash Algorithm 256-bit) is a hash algorithm accepted as the gold standard in the security industry.

Advantages of Hash

• Integrity Verification: You can instantly check if the document has been altered from its original state
• Change Detection: If even a single character in the PDF changes, the hash value becomes completely different
• Reliability: SHA-256 is a secure algorithm widely used in banking and cryptography sectors
• Digital Signature Support: Hash values can be used with digital signature systems

How Does Hash Embedding Work in Senetyaz?

Senetyaz automatically embeds the following information into every promissory note PDF you create:

1. SHA-256 Hash: The hash value of the complete PDF content
2. Promissory Note UUID: Unique identifier for each document
3. Document Version: Version information of the document format
4. Creation Date: Date and time when the PDF was created
5. Creating Platform: senetyaz.com information

This information is embedded in the PDF's metadata (metadata) field and can be viewed with standard PDF readers.

Technical Details

The hash embedding process in Senetyaz occurs in the following steps:

1. PDF is created and initial byte array is obtained
2. SHA-256 hash is calculated from this byte array
3. Hash value is added to PDF metadata along with UUID, version, and date information
4. Final PDF file is downloaded to the user

This process occurs entirely in your browser - no data is sent to the server.

Importance in Terms of Digital Asset Protection

1. Document Integrity

The hash value embedded in your PDF represents the original state of the document. When any change is made to the document (adding, deleting, modifying text, adding/removing pages), the hash value changes. This allows you to:

• Easily determine if the document has been altered
• Prove the originality of the document in legal processes
• Show third parties that the document has not been changed

2. Timestamp and Evidence

The creation date embedded in PDF metadata shows when the document was created. This information:

• Helps you determine the document's timeline
• Can be used as date evidence in legal processes
• Allows you to track document versions

3. Unique Identification

The UUID (Universally Unique Identifier) assigned to each promissory note PDF uniquely identifies the document. This:

• Facilitates document tracking
• Allows you to distinguish different versions of the same document
• Can be used in digital archiving systems

How Can You Check the Hash Value?

To check the hash value embedded in your PDF:

1. Open PDF Properties: Open file properties in your PDF reader (Adobe Reader, Chrome, etc.)
2. Review Metadata: View metadata information in the "Details" or "Properties" tab
3. Find Hash Value: You can see the SHA256-Hash value in the "Subject" or "Keywords" field

Hash Verification Tools

You can use various online tools or command-line tools to verify your PDF's hash value:

• Windows: Get-FileHash command with PowerShell
• Mac/Linux: sha256sum command in Terminal
• Online Tools: Various hash calculation websites

If the PDF's hash value matches the hash value embedded in metadata, the document has not been altered.

Security and Privacy

Senetyaz's hash embedding feature protects your privacy:

• No Data Storage: Hash calculation is done entirely in your browser
• Not Sent to Server: PDF content or hash value is never sent to any server
• Local Processing: All operations occur on your device

Usage in Legal Processes

The PDF hash embedding feature can be used to prove document integrity in legal processes:

• Enforcement Proceedings: Proving that promissory note documents have not been altered
• Court Processes: Demonstrating document originality
• Audit: Tracking document versions

Important Note: Hash embedding protects the digital integrity of the document, but other legal requirements (signature, date, etc.) must also be met for the document's legal validity.

Conclusion

Senetyaz's PDF hash embedding feature provides digital asset protection for the promissory note documents you create. Thanks to SHA-256 hash, UUID, and metadata information, you can:

• Protect the integrity of your documents
• Detect changes
• Prove document originality in legal processes
• Safely store in digital archiving systems

This feature is a reflection of Senetyaz's values of security and transparency. All operations occur in your browser and no data is sent to the server - your privacy and security are always our priority.