(DARPA)TheDARPAQuantumNetwork__R.pptVIP

The DARPA Quantum Network Chip Elliott Principal Engineer, BBN celliott@ Overview Background - Encrypted Networks Problems with Current Key Distribution Techniques A Possible Solution -Quantum Key Distribution (QKD) Building the DARPA Quantum Network Today’s Encrypted Networks Potential Weakness in Math-BasedKey Distribution Techniques A New Kind of Key Distribution -Quantum Key Distribution QKD Basic Idea (Oversimplified) Current State of the Art Real State of the Art(Grad School in Norway) Our Plans The DARPA Quantum Network Our Five-Year Plan The DARPA Quantum Network - 1st Year The DARPA Quantum Network - 2nd Year The DARPA Quantum Network - 3rd Year Overall Architecture of the Quantum Network Year 1 Weak Coherent QKD Link Year 1 Weak Coherent Link (Bob) The Quantum Cryptographic Protocols Putting It All Together BU’s High-Speed Entangled Source Building the DARPA Quantum Network Harvard University Building the DARPA Quantum Network Copyright ? 2002 by BBN Technologies.All Rights Reserved. Building the DARPA Quantum Network Harvard University Red Link Red Physical Red IP Black IP Black Link Black Physical Crypto IPsec Protocol Suite Traffic in the Clear Encrypted Authenticated Traffic (via IPsec) Traffic in the Clear Encrypted Authenticated Traffic (via IPsec) VPN Endpoint VPN Endpoint Private Enclave Private Enclave End-to-End Key Distributionby Courier or Mathematics End-to-End Encrypted Traffic Black Link Black Physical Black IP Red IP Red Link Red Physical Crypto IPsec Protocol Suite A B A B B A B A Diagram from Ueli Maurer Alice Bob Basic Idea 2 Keys: Public, Private Encrypt with Public Key Decrypt with Private Key Variants RSA (Large Prime #s) Elliptic Curve Key Enabling Technology Some math function that iseasy to do but hard to undo But . . . No Known Proofs of “One-Way” Property 1 x x x x 1 0 x 1 x 1 x x 0 x 0 1 0 1 1 0 1 0 0 1 1 1 1 0 0 1 0 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 0 1 2 3 4 5 6 1 2 3 4 5 6 7 8 9 1 1 1 1 1 1 1 0 1 2 3