Quantum Safe Cloud Computing Using Hash-based Digital Signatures

Cloud computing provides its clients with on-demand resources, such as storage and performance. The idea behind cloud computing is sharing of resources. With growth of cloud computing, the risks of security and privacy are arising. Also, the cloud resources are not secure against quantum computers, as quantum computing threatens the best security controls implemented today, that include ECC (Elliptic Curve Cryptography), RSA, DSA (Digital Signature Algorithm) and ECDSA (Elliptic Curve Digital Signature Algorithm). Fortunately, there are quantum-safe digital signatures called Hash-based Signatures, which can also protect integrity, authentication and privacy on the cloud. In this work, a hash-based digital signature scheme called WOTS is implemented to avoid security risks imposed by quantum computing on cloud computing. The implementation is carried out in CloudSim simulator. Apart from achieving quantum safety, the results show that our proposed solution is computationally cost effective.