Quantum communications are revolutionizing the way we think about data security. In April 2025, scientists at Toshiba Europe achieved a significant milestone by transmitting quantum-encrypted messages over a 254-kilometer stretch of Germany's commercial telecom network. Utilizing quantum key distribution (QKD), which leverages quantum entanglement, they secured message exchanges via standard optical fibers without the need for expensive cryogenic equipment. This breakthrough demonstrates the practicality and scalability of integrating quantum technologies into existing infrastructure, moving beyond specialized systems to more accessible solutions. ft.com
Similarly, in December 2024, Italian telecommunications provider Retelit, in collaboration with Telebit and ThinkQuantum, successfully tested QKD over a single optical fiber. This trial showcased the ability to secure data transmission without requiring additional dedicated channels, highlighting the scalability and cost-effectiveness of quantum communications. By embedding quantum devices into existing fiber-optic networks, these advancements pave the way for widespread adoption of quantum-secure communication infrastructure, essential in an era where emerging quantum computers pose threats to traditional encryption methods. thequantuminsider.com