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

We consider the two-way quantum cryptographic protocol with coherent statesassuming direct reconciliation. A detailed security analysis is performedconsidering a two-mode coherent attack, that represents the residualeavesdropping once the parties have reduced the general attack by applyingsymmetric random permutations. In this context we provide a general analyticalexpression for the keyrate, discussing the impact of the residual two-modecorrelations on the security of the scheme. In particular we identify theoptimal eavesdropping against two-way quantum communication, which is given bya two-mode coherent attack with symmetric and separable correlations.

Two-way Gaussian quantum cryptography against coherent attacks in direct reconciliation