How secure is completely secure? In the world of secure communication, a scheme may be completely secure until it’s not—that is, until an attack is proposed that reveals a weak spot in the scheme. This is what’s currently going on for Kish key distribution (KKD), which claims to derive total and unconditional security using classical rather than quantum techniques, thus avoiding the complexity and expense of quantum cryptographic schemes. But now a new paper has uncovered a vulnerability in KKD that enables an eavesdropper to correctly determine more than 99.9% of the transmitted bits. Fortunately, countermeasures may exist to protect against this attack and regain the system’s security.
“The worthiness of a cryptographic scheme is measured by the number of papers that try to attack it,” Derek Abbott, Professor at The University of Adelaide in Australia and coauthor of the new paper, told Phys.org. Abbott and coauthors Lachlan J. Gunn and Andrew Allison have published their paper in a recent issue of Nature’s Scientific Reports.
Read more at: Phys.org