Submarines must be able to talk securely with remote naval bases while remaining submerged. Could quantum communications allow them to pull off this technically challenging feat?

Hackers have cheated a gold-standard test of quantum cryptography. By using lasers to help fake the quantum property of entanglement, they have called into question attempts to build uncrackable cryptographic systems.

Quantum hackers have performed the first 'invisible' attack on two commercial quantum cryptographic systems. By using lasers on the systems — which use quantum states of light to encrypt information for transmission — they have fully cracked their encryption keys, yet left no trace of the hack.

Time travel, such as, say, through a “wormhole,” appears to make it possible to distinguish quantum information that usually can’t be distinguished. That ability would disrupt the absolute security of quantum encryption, theoretical physicist Todd Brun and collaborators report online in the quantum physics archive.

Perfect secrecy has come a step closer with the launch of the world's first computer network protected by unbreakable quantum encryption at a scientific conference in Vienna.

The US Army Research Office and the National Security Agency (NSA) are together looking for some answers to their quantum physics questions on quantum computing and cryptography.

A group of international researchers and Siemens Austria has demonstrated in Vienna the transmission of quantum-encrypted messages across commercial telecommunication links. The achievement could bring quantum encryption close to commercial deployment.

University of Vienna researchers hope to send an experiment to the International Space Station (ISS) by the middle of the next decade that would pave the way for transcontinental transmission of secret messages encoded using quantum entanglement.

Stephen Page argues that given the capability of quantum computers to invalidate cryptography techniques, society should "create safeguards, standards and laws to prevent people from using quantum computers to wreak destruction."

Code-makers could be on the verge of winning their ancient arms race with code-breakers. After 20 years of research, an encryption process is emerging that is considered unbreakable because it employs the mind-blowing laws of quantum physics.