QCom DAO Technology

QKD enables two parties to produce a shared random secret key known only to them, which can then be used to encrypt and decrypt messages. Any attempt to intercept the key exchange would be detected, making it theoretically secure against all computational attacks.

How QKD Works:

1. The sender (Alice) transmits photons in one of several possible quantum states
2. The receiver (Bob) measures these photons
3. Alice and Bob compare a subset of their measurements over a public channel
4. If an eavesdropper (Eve) attempts to intercept, the quantum properties ensure that her presence will be detected
5. Once verified secure, the remaining measurements are used to generate a shared secret key

Quantum repeaters allow quantum information to be relayed across networks without breaking the quantum properties that provide security.

Key Components:

• Quantum memory to store quantum states
• Entanglement swapping protocols
• Quantum error correction
• Purification techniques to maintain high-fidelity entanglement

Quantum memory allows for the storage of quantum information, a crucial component for creating quantum networks.

Current Approaches:

• Atomic ensembles in optical cavities
• Nitrogen-vacancy centers in diamond
• Rare-earth ion-doped crystals
• Superconducting circuits

By leveraging quantum entanglement, quantum teleportation allows for the transfer of quantum states between distant locations.

Applications:

• Secure transmission of quantum information over long distances
• Foundation for quantum internet architecture
• Distributed quantum computing
• Secure multi-party quantum computation