Privacy by Design: How GSMA Open Gateway is building trust into the API economy
As digital fraud becomes more sophisticated and widespread, the mobile industry is taking meaningful steps to protect people and their digital lives. At the heart of this effort is a new generation of identity and anti-fraud APIs designed to build trust, reduce harm, and create safer digital experiences for everyone.
GSMA Open Gateway is a global initiative that standardises access to mobile networks through interoperable APIs. These tools are already empowering banks, fintechs, and enterprises to verify identities, prevent fraud, and deliver seamless, secure services to their users.
But with this capability comes a deep responsibility – to ensure that innovation respects and protects individual privacy. It’s not just about compliance; it’s about doing what’s right for the people who rely on these technologies every day.
The role of the GSMA: Setting the privacy principles
The GSMA plays a central role in shaping the privacy landscape for the mobile world. Through its Mobile Privacy Principles—first published in 2011 and still foundational today—the GSMA outlines how mobile consumers’ data should be respected and protected in the mobile environment. These principles are based on internationally accepted data protection norms and include:
- Transparency
- User choice and control
- Data minimisation
- Security
- Accountability
Rather than focusing on one single regulation, GSMA takes a principles-based approach that can be adapted across jurisdictions. This flexibility is essential in a world where privacy laws—from the EU’s General Data Protection Regulation (GDPR) to India’s Digital Personal Data Protection Act—vary widely in scope and enforcement.
Consumer trust in the API ecosystem
Security and privacy are interconnected principles and reinforce each other. Robust security measures protect personal data from unauthorised access or data leaks and strong privacy practices ensure data is handled responsibly. As Tooba Kazmi clarifies: “Together, security and privacy enable each other. Both are necessary to build trust, empower individuals and safeguard user rights.”
Take anti-fraud APIs, for example. These tools rely on data points like SIM swap events, device identifiers, or call metadata to detect suspicious activity. But they don’t compromise user privacy. Data protection and privacy laws mean data controllers such as mobile operators are expected to clearly define the purpose of data processing, choose an appropriate legal basis (e.g. legitimate interest or consent), inform users transparently and offer opt-in or opt-out mechanisms where appropriate.
Ultimately, it’s about trust, and trust is built not just through compliance, but through clarity, control, and consistency.
The consent conundrum
One of the thorniest challenges for any organisation deploying APIs globally is managing user consent. While GSMA Open Gateway provides a standardised technical framework, the legal frameworks around consent are anything but standardised.
In the EU, the GDPR states that consent must be freely given, specific, informed, and unambiguous. In other regions, the bar may be lower or defined differently altogether. Add to that telecom-specific regulations in many countries that apply specifically to mobile operators, and you get a complex compliance landscape that can slow down or even block API adoption.
The result? Most enterprises deploy APIs market by market, rather than globally. Some take a “highest common denominator” approach. Others tailor their deployments to local rules, which can be more efficient but harder to scale.
Privacy-enhancing technologies: The next frontier
To navigate this complexity, many operators are turning to Privacy Enhancing Technologies (PETs), tools that allow personal data to be used without exposing it, a model supported by the GSMA.
Key PETs gaining traction include:
- Zero-Knowledge Proofs: Which allow one party to prove something to another without revealing the underlying data.
- Differential Privacy: Which adds statistical noise to datasets to protect individual identities.
- Homomorphic Encryption: Which enables computation on encrypted data without decrypting it.
These technologies are especially promising for fraud prevention, where real-time insights are critical but personal data must remain protected.
Preventing function creep
Another aspect relevant in the API space is function creep, the risk that data collected for one purpose (e.g. fraud prevention) could be repurposed for another (e.g. marketing).
To address this, Open Gateway APIs embed the purpose and legal basis for processing any personal data into the API specification itself. This means that if an API is designed for fraud detection under a legitimate interest basis, it can’t be quietly repurposed for unrelated uses.
While compliance ultimately lies with the operator, this privacy-by-design architecture helps ensure that APIs are used as intended and that trust isn’t eroded by misuse.
Transparency and accountability: More than buzzwords
Transparency is one of GSMA’s core privacy principles, but what does it look like in practice?
While GSMA doesn’t mandate specific mechanisms like audits or dashboards, it encourages mobile operators to clearly explain how APIs work and what data they use, provide accessible privacy notices and offer meaningful user controls.
This is especially important in a world where consumer expectations are rising. If users feel their data is being used in opaque or overly broad ways, trust can break down—even if the use is technically legal.
Building bridges across the ecosystem
Data privacy isn’t just a legal or technical issue – it’s a collaborative one. The GSMA plays a vital role in bringing together operators, enterprises and developers, regulators and policymakers and technology providers.
Through initiatives like GSMA Fusion, the organisation helps align industry needs with regulatory expectations. Meanwhile, the GSMA’s regional advocacy teams work on the ground to educate policymakers and build trust.
As Kazmi puts it, “A lot of our work is about educating regulators – explaining what mobile operators actually do, how data flows, and what these APIs are really for. Often they’re not tech experts, so we help to bridge that gap.”
The future of privacy in the API economy
Looking ahead, several trends are likely to shape the privacy landscape for GSMA Open Gateway and beyond:
- Increased use of PETs: As network APIs continue to develop, privacy-enhancing technologies will become essential.
- Privacy-by-design: Already embedded in laws like GDPR, privacy-by-design frameworks will become standard practice across industries. Privacy-by-design frameworks are structured approaches that embed privacy and data protection principles into the design and operation of systems, processes, and technologies from the outset rather than as an afterthought.
- Regulatory harmonisation (or not): The EU is moving toward a more unified data strategy, but many other jurisdictions around the world are adopting or considering data localisation strategies.
- Cultural context matters: A one-size-fits-all approach may never be realistic. Instead, network APIs must be flexible enough to adapt to local norms and expectations.
Conclusion: Winning trust through privacy
In the race to deploy APIs that fight fraud, verify identities, and power new digital experiences, data privacy is at the heart. Enterprises that get it right will not only comply with the law but earn the trust of their users.
Data privacy and innovation are not mutually exclusive. GSMA Open Gateway APIs show that it is possible to protect users’ data while still enabling the flow of information that powers innovative digital services. The key lies in thoughtful, intentional design—embedding privacy considerations from the outset rather than retrofitting them later, demonstrating how privacy-by-design frameworks can support both trust and technological progress.
GSMA Open Gateway is embedding privacy into the very fabric of the API economy.