Identifying Originality of Data After Transferring to a New Storage Device

Shivendra Pratap Singh


High Court Lucknow


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As we increasingly rely on digital data in both personal and professional realms, ensuring the integrity and authenticity of our data becomes paramount. When you transfer data from one storage device to another, how can you ascertain its originality? This blog post dives into techniques and best practices to confirm the authenticity of copied data.

1. Understanding Data Originality and Integrity

Data originality refers to the assurance that data has not been altered or tampered with, intentionally or accidentally. Ensuring data integrity means that the data remains intact and unchanged from its original state during storage, retrieval, or transfer.

2. Methods to Verify Data Originality

  • Checksums and Hashes: These are mathematical algorithms that generate a fixed-size string of bytes from input data of any size. Even a tiny change in the input data will result in a dramatically different hash. By comparing the hash value of the original and copied data, you can verify integrity.
    • Popular hashing algorithms: MD5, SHA-1, SHA-256.
  • Digital Signatures: These are cryptographic equivalents of handwritten signatures. They validate the integrity of data and its sender. By verifying a digital signature, you can ensure that the data has not been altered since it was signed.
  • File Metadata: Metadata provides information about a file’s creation, modification, and properties. By comparing metadata between original and copied files, discrepancies can be spotted.
  • File Size Comparison: While not foolproof, comparing the size of the original and copied files can be a quick initial step to check for major inconsistencies.

3. Best Practices for Data Transfer

  • Use Verified Copy Tools: Software tools like TeraCopy or rsync provide verified copying, ensuring data remains consistent between the source and the destination.
  • Avoid Interrupted Transfers: Ensure that data transfers are not interrupted, which can lead to corruption.
  • Maintain Original Devices: Until you’ve verified the integrity of the copied data, it’s wise to retain the original storage device in an unchanged state.

4. Handling Large Datasets

With vast amounts of data, manual checks become unfeasible. In such cases:

  • Automated Scripts: Use scripts to generate and compare checksums for large datasets. Tools like hashdeep can generate hash values for entire directories.
  • Batch Verification Tools: Some software provides batch verification features to check the integrity of multiple files simultaneously.

5. The Challenge of Time

It’s essential to recognize that storage devices degrade over time, and data integrity checks become even more critical for older data. Periodically refreshing your data, which involves copying it to new storage media, can help preserve its integrity.

6. Data Authenticity Beyond Integrity

Ensuring that data hasn’t changed is one part of the puzzle; proving its source or authenticity is another. Digital certificates, watermarking, and blockchain are emerging solutions that, in addition to ensuring data integrity, also verify the data’s provenance.


As the adage goes, “Trust, but verify.” When it comes to digital data, these are words to live by. With the tools and techniques available today, verifying the originality of your data is both a practical and necessary endeavor. In the digital era, maintaining the integrity and authenticity of our data ensures that we can trust the foundations upon which our digital lives and businesses are built.