dorsal/arxiv
View SchemaOn the role of coherent attacks in a type of strategic problem related to quantum key distribution
| Authors | Wang Xiang-bin |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0110089 |
| URL | https://arxiv.org/abs/quant-ph/0110089 |
Abstract
We consider a strategic problem of the Evesdropping to quantum key distribution. Evesdropper hopes to obtain the maxium information given the disturbance to the qubits is often For this strategy, the optimized individual attack have been extensively constructed under various conditions. However, it seems a difficult task in the case of coherent attack, i.e., Eve may treat a number of intercepted qubits collectively, including the collective unitary transformations and the measurements. It was conjectured by Cirac and Gisin that no coherent attack can be more powerful for this strategy for BB84 protocol. In this paper we give a general conclusion on the role of coherent attacks for the strategy of maxmizing the information given the disturbance. Suppose in a quantum key distribution(QKD) protocol, all the transmitted bits from Alice are independent and only the individual disturbances to each qubits are examined by Alice and Bob. For this type of protocols(so far almost all QKD protocols belong to this type), in principle no coherent attack is more powerful than the product of optimized individual attack to each individual qubits. All coherent attacks to the above QKD protocols can be disregarded for the strategy above.
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"abstract": "We consider a strategic problem of the Evesdropping to quantum key\ndistribution. Evesdropper hopes to obtain the maxium information given the\ndisturbance to the qubits is often For this strategy, the optimized individual\nattack have been extensively constructed under various conditions. However, it\nseems a difficult task in the case of coherent attack, i.e., Eve may treat a\nnumber of intercepted qubits collectively, including the collective unitary\ntransformations and the measurements. It was conjectured by Cirac and Gisin\nthat no coherent attack can be more powerful for this strategy for BB84\nprotocol. In this paper we give a general conclusion on the role of coherent\nattacks for the strategy of maxmizing the information given the disturbance.\nSuppose in a quantum key distribution(QKD) protocol, all the transmitted bits\nfrom Alice are independent and only the individual disturbances to each qubits\nare examined by Alice and Bob. For this type of protocols(so far almost all QKD\nprotocols belong to this type), in principle no coherent attack is more\npowerful than the product of optimized individual attack to each individual\nqubits. All coherent attacks to the above QKD protocols can be disregarded for\nthe strategy above.",
"arxiv_id": "quant-ph/0110089",
"authors": [
"Wang Xiang-bin"
],
"categories": [
"quant-ph"
],
"title": "On the role of coherent attacks in a type of strategic problem related to quantum key distribution",
"url": "https://arxiv.org/abs/quant-ph/0110089"
},
"schema_id": "dorsal/arxiv",
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