uu.seUppsala University Publications
Change search
ReferencesLink to record
Permanent link

Direct link
Unconditional security by the laws of classical physics
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences, Solid State Physics.
Show others and affiliations
2013 (English)In: METROLOGY AND MEASUREMENT SYSTEMS, ISSN 0860-8229, Vol. 20, no 1, 3-16 p.Article in journal (Refereed) Published
Abstract [en]

There is an ongoing debate about the fundamental security of existing quantum key exchange schemes. This debate indicates not only that there is a problem with security but also that the meanings of perfect, imperfect, conditional and unconditional (information theoretic) security in physically secure key exchange schemes are often misunderstood. It has been shown recently that the use of two pairs of resistors with enhanced Johnson-noise and a Kirchhoff-loop - i.e., a Kirchhoff-Law-Johnson-Noise (KLJN) protocol - for secure key distribution leads to information theoretic security levels superior to those of today's quantum key distribution. This issue is becoming particularly timely because of the recent full cracks of practical quantum communicators, as shown in numerous peer-reviewed publications. The KLJN system is briefly surveyed here with discussions about the essential questions such as (i) perfect and imperfect security characteristics of the key distribution, and (ii) how these two types of securities can be unconditional (or information theoretical).

Place, publisher, year, edition, pages
2013. Vol. 20, no 1, 3-16 p.
Keyword [en]
information theoretic security, unconditional security, secure key exchange, secure key distribution, quantum encryption
National Category
Engineering and Technology
Research subject
Engineering Science with specialization in Solid State Physics
URN: urn:nbn:se:uu:diva-202464DOI: 10.2478/mms-2013-0001ISI: 000318882300001OAI: oai:DiVA.org:uu-202464DiVA: diva2:634847
Available from: 2013-07-01 Created: 2013-06-24 Last updated: 2014-01-31Bibliographically approved

Open Access in DiVA

fulltext(858 kB)231 downloads
File information
File name FULLTEXT01.pdfFile size 858 kBChecksum SHA-512
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Search in DiVA

By author/editor
Granqvist, Claes-Göran
By organisation
Solid State Physics
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 231 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 420 hits
ReferencesLink to record
Permanent link

Direct link