There is no official ranking system or data to definitively declare the best and most secure payment gateway Indonesia, as the choice of a payment gateway depends on various factors, including the specific needs of an e-commerce business. However, we can identify the characteristics of a secure payment gateway that businesses should look for when making their decision:

Security: A secure payment gateway should prioritize data protection through encryption and compliance with industry standards, such as PCI DSS. It should also have advanced fraud prevention tools to safeguard transactions.

Reliability: The gateway should offer high availability and minimal downtime to ensure uninterrupted payment processing.

Good Reputation: A payment gateway Indonesia with a positive reputation and a track record of successfully serving e-commerce businesses is often a good choice.

We don't have any official data to find the most secure payment gateway in Indonesia. However, you can stick to one of the best, if not the best payment gateway in the country: PayCly. It is a well-established and trusted payment gateway provider that meets many of these secure gateway characteristics.

PayCly provides a cheap payment gateway Indonesia with a range of features and services that can benefit e-commerce business, including top-tier security measures and support for various payment methods. However, it's essential to conduct your due diligence and evaluate how PayCly aligns with your business's unique requirements before making a decision.