Cloud-Aware Cryptographic Code Construction for Post-QuantumSecurity in Cloud-Native Microservices

Abstract

Cloud-native infrastructures now form the backbone of modern digital systems, offering
scalability and flexible deployment, But they introduce new security challenges beyond
traditional cryptographic methods. The rise of quantum computing further threatens widely
used algorithms like RSA and ECC, which remain vulnerable to quantum attacks. Most postquantum
solutions focus narrowly on standalone primitives, overlooking the distributed
nature of cloud-native systems. To address this, Cloud-Aware Cryptographic Code
Construction (CAC³) method, comprise of lattice-based routines designed for containerized
execution environments is proposed. CAC³ ensures confidentiality and integrity under
concurrent workloads while supporting distributed key generation, context-aware parameter
allocation, and orchestration compatibility. CAC³ integrates post-quantum primitives directly
into the cloud-native execution context, facilitating scalable quantum-safe cloud services. The
working prototype was developed locally and tested remotely on the cloud server of i2k2.com,
simulating multi-tenant cryptography and communication among microservices. Tenant data
is encrypted and verified at the destination via orchestrated channels. Performance is
measured in terms of key generation, encryption, decryption, signing and verification time
along with distributed key generation latency under simulated multi-tenant workloads. This
work forms the core cryptographic layer for future expansion with composability, adaptive
authentication and in-transit performance evaluation over orchestrated channels. The paper
provides a unified approach to securing cloud-native infrastructures in the quantum era.