Post-Quantum Cryptography Boosts Indonesia’s Readiness for Digital Security Threats

JAKARTA – Advances in quantum technology are creating new opportunities for technological progress while posing challenges to digital information security. They could affect the reliability of some cryptographic systems currently used to protect data and digital infrastructure. In response, Peruri made Post-Quantum Cryptography (PQC) a key topic at the Peruri Digital Summit 2026, held last October at Taman Kota Peruri in South Jakarta.

PQC is a cryptographic approach designed to remain secure against potential attacks by future quantum computers. Its development is becoming increasingly important as demand grows for digital information protection across sectors including government, finance, healthcare and nationally strategic infrastructure.

During a panel discussion on the first day, speakers highlighted a risk that needs to be anticipated: “harvest now, decrypt later”. This refers to the possibility that encrypted data could be collected today and decrypted later, when technology has advanced sufficiently. It shows that digital security challenges concern not only threats faced today, but also the need to protect information over the long term.

In addressing this risk, the readiness of institutions and organisations is just as important as technological progress. Initial steps include mapping digital assets, identifying the cryptographic systems in use, assessing security risks and prioritising technological changes according to the sensitivity of the information and the level of protection required.

Edwin Purwandesi, Peruri’s Director of Digital Business, said during the discussion that Peruri is participating in a working group preparing for developments in post-quantum technology. One of the steps underway is preparing a mechanism to identify potentially affected digital assets.

“We are entering phase one: preparing the mechanisms and tools for scanning an inventory of assets that may be affected. This is the foundation for understanding potential risks to digital security systems, so mitigation and technological adjustments can be made gradually and in a targeted manner as quantum computing develops,” Edwin said.

Eko Yon Handri of the National Cyber and Crypto Agency (BSSN) likewise stressed the importance of preparing for quantum-computing threats, particularly by adopting PQC. He said advances in quantum computing meant institutions and organisations should begin evaluating their digital security systems and preparing to transition to cryptographic technologies better able to withstand future threats.

“Quantum-computing threats need to be anticipated early, given that data encrypted today could potentially be decrypted in the future. Readiness to adopt post-quantum cryptographic technology is therefore an important step in ensuring that data security and digital trust are maintained as technology develops,” Eko said.

The discussion of PQC continued on the second day with a masterclass entitled “Quantum Safe in Practice: Implementing ML-KEM and ML-DSA from the Perspective of System Developers and Testers”. The session covered the application of quantum-resistant cryptographic algorithms, system architecture readiness and security testing approaches as part of adapting to technological developments.

The sessions underscored that information protection in the age of quantum computing needs to be prepared for early, before the threat becomes more immediate. Through the Peruri Digital Summit 2026, Peruri is encouraging anticipatory action and cross-sector collaboration to strengthen Indonesia’s digital security readiness. These efforts are intended to help protect data and strategic infrastructure, build trust in the digital ecosystem, and reinforce Indonesia’s digital resilience and sovereignty amid global technological change.