Threshold quantum cryptography (5 pages)

Ben Rothke

Yuuki Tokunaga, Tatsuaki Okamoto, Nobuyuki Imoto

We present the concept of threshold collaborative unitary transformation or threshold quantum cryptography, which is a kind of quantum version of threshold cryptography. Threshold quantum cryptography states that classical shared secrets are distributed to several parties and a subset of them, whose number is greater than a threshold, collaborates to compute a quantum cryptographic function, while keeping each share secretly inside each party. The shared secrets are reusable if no cheating is detected. As a concrete example of this concept, we show a distributed protocol (with threshold) of conjugate coding.

B. Collins

DOI: 10.1049/ic:20050578 ISBN: 0-86341-590-3 Location: London, UK Conference date: 7 Dec. 2005 Format: PDF This paper presents a slide presentation of the business impact of quantum cryptography. The pragmatics of quantum cryptography are also included in the presentation. (3 pages) Inspec keywords: business communication; quantum cryptography; telecommunication security; quantum computing Subjects: Cryptography; Quantum computing techniques; Cryptography theory; Data security

Ben Rothke

G. Prati

DOI: 10.1049/cp:20050842 ISBN: 0 86341 543 1 Location: Glasgow, UK Conference date: 25-29 Sept. 2005 Format: PDF (35 pages) Inspec keywords: telecommunication security; optical fibre communication; quantum cryptography Subjects: Cryptography; Quantum optics; Optical communication; Quantum communication; Quantum cryptography; Optical communication