Superlinear threshold detectors in quantum cryptography

Threshold Quantum Cryptography

Most current research on quantum cryptography requires transmission and reception of single photons that creates severe implementation challenges and limits range. This paper argues for the development of threshold quantum cryptography protocols in which the system is secure so long as the number of photons being exchanged between Alice and Bob is below a specified threshold. We speak of a (p-k...

Thermal blinding of gated detectors in quantum cryptography.

It has previously been shown that the gated detectors of two commercially available quantum key distribution (QKD) systems are blindable and controllable by an eavesdropper using continuous-wave illumination and short bright trigger pulses, manipulating voltages in the circuit [Nat. Photonics 4, 686 (2010)]. This allows for an attack eavesdropping the full raw and secret key without increasing ...

RSA Threshold Cryptography

In this project, a new threshold signing scheme for RSA has been proposed. The scheme does not require a trusted third party and no secure information is leaked throughout the protocol. The time and storage complexity of the protocol is linear in the number of parties and no restriction is placed on the RSA moduli. Combined with the n-out-of-n key generation protocol of Boneh and Franklin, one ...

Quantum Cryptography

Quantum cryptography

This is a chapter on quantum cryptography for the book “A Multidisciplinary Introduction to Information Security” to be published by CRC Press in 2011/2012. The chapter aims to introduce the topic to undergraduate-level and continuing-education students specializing in information and communication technology.