English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The existence of an undetectable eavesdropping of dense coded information hasbeen already demonstrated by Pavi\v{c}i\'c for the quantum direct communicationbased on the ping-pong paradigm. However, a) the explicit scheme of the circuitis only given and no design rules are provided, b) the existence of losses isimplicitly assumed, c) the attack has been formulated against qubit basedprotocol only and it is not clear whether it can be adapted to higherdimensional systems. These deficiencies are removed in the presentedcontribution. A new generic eavesdropping scheme built on a firm theoreticalbackground is proposed. In contrast to the previous approach, it does not referto the properties of the vacuum state, so it is fully consistent with theabsence of losses assumption. Moreover, the scheme applies to the communicationparadigm based on signal particles of any dimensionality. It is also shown thatsome well known attacks are special cases of the proposed scheme.

A general scheme for information interception in the ping pong protocol