dorsal/arxiv
View SchemaSecure Controlled Teleportation
| Authors | Dan Kenigsberg, Tal Mor |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0609028 |
| URL | https://arxiv.org/abs/quant-ph/0609028 |
Abstract
Several protocols for controlled teleportation were suggested by Yang, Chu, and Han [PRA 70, 022329 (2004)]. In these protocols, Alice teleports qubits (in an unknown state) to Bob iff a controller allows it. We view this problem in the perspective of secure multi-party quantum computation. We show that the suggested entanglement-efficient protocols for $m$-qubit controlled teleportation are open to cheating; Alice and Bob may teleport $(m-1)$-qubits of quantum information, out of the controllers' control. We conjecture that the straightforward protocol for controlled teleportation, which requires each controller to hold $m$ entangled qubits, is optimal. We prove this conjecture for a limited, but interesting, subset of protocols.
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"abstract": "Several protocols for controlled teleportation were suggested by Yang, Chu,\nand Han [PRA 70, 022329 (2004)]. In these protocols, Alice teleports qubits (in\nan unknown state) to Bob iff a controller allows it. We view this problem in\nthe perspective of secure multi-party quantum computation. We show that the\nsuggested entanglement-efficient protocols for $m$-qubit controlled\nteleportation are open to cheating; Alice and Bob may teleport $(m-1)$-qubits\nof quantum information, out of the controllers\u0027 control. We conjecture that the\nstraightforward protocol for controlled teleportation, which requires each\ncontroller to hold $m$ entangled qubits, is optimal. We prove this conjecture\nfor a limited, but interesting, subset of protocols.",
"arxiv_id": "quant-ph/0609028",
"authors": [
"Dan Kenigsberg",
"Tal Mor"
],
"categories": [
"quant-ph",
"cs.CR"
],
"title": "Secure Controlled Teleportation",
"url": "https://arxiv.org/abs/quant-ph/0609028"
},
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"execution_id": "352bb693-9b9f-48ea-af48-b6f34419d00e",
"id": "arXiv Dataset IDs",
"type": "Model",
"variant": "snapshot-2026-03-01",
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