TY - JOUR
T1 - Comment on
T2 - "Exposed-key weakness of αη" [Phys. Lett. A 370 (2007) 131]
AU - Nair, Ranjith
AU - Yuen, Horace P.
N1 - Funding Information:
This work was supported by AFOSR under grant FA9550-06-1-0452.
PY - 2008/11/24
Y1 - 2008/11/24
N2 - We show that the insecurity claim of the αη cryptosystem made by C. Ahn and K. Birnbaum in [C. Ahn, K. Birnbaum, Phys. Lett. A 370 (2007) 131] under heterodyne attack is based on invalid extrapolations of Shannon's random cipher analysis and on an invalid statistical independence assumption. We show, both for standard ciphers and αη, that expressions of the kind given by Ahn and Birnbaum can at best be interpreted as security lower bounds.
AB - We show that the insecurity claim of the αη cryptosystem made by C. Ahn and K. Birnbaum in [C. Ahn, K. Birnbaum, Phys. Lett. A 370 (2007) 131] under heterodyne attack is based on invalid extrapolations of Shannon's random cipher analysis and on an invalid statistical independence assumption. We show, both for standard ciphers and αη, that expressions of the kind given by Ahn and Birnbaum can at best be interpreted as security lower bounds.
KW - Data encryption
KW - Quantum cryptography
KW - Random cipher
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U2 - 10.1016/j.physleta.2008.10.037
DO - 10.1016/j.physleta.2008.10.037
M3 - Comment/debate
AN - SCOPUS:55549112526
SN - 0375-9601
VL - 372
SP - 7091
EP - 7096
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 47
ER -