Three years ago,  Sach Kahoon — a Hindi–Punjabi newspaper published across multiple Indian states in India — transitioned from free-access e-paper distribution to a paid subscription-based model using Vedanta Software’s cloud-based E-paper CMS.

The objective was to reduce the adverse impact of free digital circulation on print bookings and establish a stable, sustainable digital revenue stream.

While this initially delivered positive results for the company, a serious challenge soon emerged: e-paper PDF piracy. Users began downloading page images, converting them into PDFs, and circulating complete editions on platforms such as WhatsApp and Telegram — directly undermining paid readership.

Immediate impact

As pirated copies appeared, Sach Kahoon began seeing negative impacts, including: 

• Subscription decline: Readers opted for pirated copies instead of official access.
• Revenue loss: Both print and digital subscriptions were affected,  registering a 10%-15% decline.
• Lack of traceability: JPEG downloads left no identifiable user footprint.

This challenge reflected a broader industry problem faced by publishers worldwide. Some of the initial challenges encountered in tackling this problem included:

• No strong built-in anti-piracy tracking in the existing CMS.
• Some users knowingly violated copyright policies.
• Limited internal resources to monitor piracy across multiple editions.
• Predictable file structures enabling unauthorised access.

Creating a new system

Phase 1 of this approach involved user ID watermarking and policy enforcement. In collaboration with Vedanta Software, Sach Kahoon implemented a unique numeric user ID watermark on every e-paper page accessed by a logged-in user.

This was effective for multiple reasons: 

• Pirated PDFs could be traced instantly to specific users.
• Offending accounts were immediately blocked, strictly in line with the publication’s terms and conditions and refund policy, which clearly state direct account suspension with no refund in cases of misuse or piracy.
• Even when users attempted re-registration using new e-mails, fresh watermark IDs enabled quick detection.

This phase significantly reduced piracy, but the threat soon evolved.

Eliminating PDF filename guessing

Pirates began circulating original PDF files obtained via URL guessing, with filenames following predictable patterns such as “10-sep-haryana.pdf.”

Vedanta Software introduced automatic random alphanumeric prefixes to every PDF file, for example, “hdu58gsj-10-sep-haryana.pdf.”

This made PDF URLs impossible to predict whilst backend tracking remained intact. Even better, no additional hardware or cost was required.

From the day this fix went live, PDF-level piracy stopped entirely.
For user convenience, watermarking was temporarily disabled but retained as a fallback mechanism.

New piracy methods emerge

After a period of stability, Sach Kahoon observed that piracy resurfaced, this time enabled by more advanced image-level extraction techniques. Examination of pirated copies revealed a key issue: the watermark was completely missing.

Vedanta Software conducted a detailed technical investigation and identified two critical vulnerabilities:

1. Clip cropping limitation. When page clips were cropped, the watermark was not applied. This allowed users to extract large, clean image sections and reconstruct full PDFs without traceability.
2. Weak image file-name pattern. Page images used a predictable structure via Open Graph image tags, such as “2323232-page1.jpg.”

The numeric prefix remained constant across pages. Once a single-page file name was identified, all other pages could be downloaded sequentially (XXXXX-page2.jpg, XXXXX-page3.jpg, and so on).

Implementing advanced security fixes 

To eliminate these vulnerabilities, Vedanta Software deployed additional security layers:

1. Watermarking enabled on all cropped clips. Watermarks were extended to all clipped and cropped images, ensuring no image — full or partial — could be extracted without embedded user identification.
2. Fully unique image file names. Each page image now receives a completely random and unique filename, for example, “2465454-page1.jpg” or “46546543-page2.jpg.”

This removed any possibility of sequential downloading or file-name guessing.

Results and impact

These measures proved successful for Sach Kahoon, and the results were impressive: 

• 100% elimination of piracy across PDFs and images.
• 10%-15% recovery in subscription revenue.
• Stabilised print and digital circulation.
• Improved publisher confidence in digital security.

 There was an industry-wide benefit as well, as Vedanta Software extended these protections to other publisher clients. 

Sach Kahoon’s experience demonstrates that digital piracy prevention is an evolving process, not a one-time fix. Through continuous monitoring, close collaboration with a technology partner, and layered security design, even sophisticated piracy methods can be neutralised.

Implemented through multiple trials beginning in August 2025 and fully stabilised by mid-January, this initiative shows how a serious digital threat can be transformed into a long-term operational advantage.

Banner image: Adobe Stock By DudeDesignStudio

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