2 papers
quant-ph2026
Error-tolerant secure key leasing for quantum decryption keys in public-key encryption
Duo Xu, Yuki Takeuchi
We propose the first error-tolerant secure key leasing (SKL) for public-key encryption. As with SKL in prior works, our protocol consists of a lessor and lessee. In the protocol, t…
quant-ph2025
Rewindable Quantum Computation and Its Equivalence to Cloning and Adaptive Postselection
Ryo Hiromasa, Akihiro Mizutani, Yuki Takeuchi +1
We define rewinding operators that invert quantum measurements. Then, we define complexity classes , , and as sets of decision problems s…