4 papers
WLPA: A Network Management Framework for Allocating Scarce Quantum-Safe Link Postures under Weakest-Link Exposure
Bhanwar Gupta, Sanjeev Rana
Network operators migrating distributed systems to post-quantum and quantum-safe cryptography face a resource-management problem: quantum key distribution (QKD) gives the strongest…
Transcript-Bound Combiners for Downgrade-Resilient Hybrid Post-Quantum Key Establishment: Definition, Proof, and Embedded-Device Cost
Bhanwar Gupta, Sanjeev Rana
Hybrid key establishment runs a post-quantum key-encapsulation mechanism (KEM) alongside a classical Diffie-Hellman primitive, so that the session key stays secure while either com…
GAUGE: A Formal Framework for Measuring Cryptographic Security under Heterogeneous Adversary Cost Models
Bhanwar Gupta, Sanjeev Rana
Standards bodies report cryptographic security as a single number of bits, but this value depends on the adversary cost model used to price time, memory, and quantum resources. Dif…
Quantum Inversion of Units in Group Rings: Block Dimension, Not Commutativity, Governs Hardness
Bhanwar Gupta
Several public-key schemes base their security on the belief that inverting a unit of a group ring is hard. A recent result showed that this belief is false on a quantum computer w…