PPT-Another tree for Alice and Bob

Conceal or not conceal Does she or doesnt she Simultaneous play Shows A S hows B T o A Alice Alice T o B T o A Show B 2 3 0 0 1 1 3 2 She loves him Nature She scorns him. brPage 1br Alice Bob Trent Alice Bob Trent Evidence Evidence Arbitrated Protocol Adjudicated Protocol Sharing Information While Enforcing Privacy Policies. Emil Stefanov. Elaine Shi. Dawn Song. emil@cs.berkeley.edu. elaines@cs.berkeley.edu. dawnsong@cs.berkeley.edu. http://www.emilstefanov.net/Research. Part 2. Aditi. . Harish-Chandra Research Institute, India. Outline. Communication. Secure Communication. Quantum Cryptography. Communication. Without security. Classical info. transmission. Quantum state. Aditya Akella. Outline . Accountable Virtual Machines. Accountability in and via SDN. AVM Scenario. : Multiplayer game. Alice decides to play a game of Counterstrike with Bob and Charlie. 3. Alice. Bob. Universally-Verifiable Voting With Everlasting Privacy. Tal . Moran. Outline of Talk. Flavors. of Privacy (and why we care). A Cryptographic Voting Scheme with Everlasting Privacy. Based on the “Neff-. By: . Enriqueta Ramirez and . Johnny Reyes. Acknowledgments. Susan B. Taber. . Using Alice in Wonderland to Teach Multiplication of Fractions. Kat Cain. . Lesson Template. Exponents in Wonderland. -Hellman Key Exchange. CSCI 5857: Encoding and Encryption. Outline. Key exchange without public/private keys. Public and private components of . Diffie. -Hellman. Secure information exchange in . Diffie. Modular exponentiation for encryption/decryption. Efficient algorithms for this. Attacker needs to factor large numbers to extract key. Must use brute-force. One-way hash functions. Collision-free, collision-resistant. (not examinable). BB84 . protocol (simplified). Alice sends a sequence of photons to Bob, each polarised in one of several directions. If Eve eavesdrops on some of them, they may randomly change their direction of polarisation. Problem 8.10. Bargaining over 100 pounds of gold. Round 1: Todd makes offer of Division.. Steven accepts or rejects.. Round 2: If Steven rejects, estate is reduced to 100d pounds. Steven makes a new offer and Todd accepts or rejects.. to databases. Wolfgang Gatterbauer. , Magda Balazinska, . Nodira Khoussainova, and Dan Suciu. University of Washington. http://db.cs.washington.edu/beliefDB/. August 25, VLDB . 2009. 2. High-level overview. Oblivious Transfer (OT). A Simple AND Garbled Circuit. Free XOR / NOT Garbled Circuits. Garbled Circuits’ Basic Cost. Oblivious Transfer (OT). 1 out of 2 or 1 out of N. Alice transfers to Bob . 2. or . ). Shared Key Exchange Problem. How do Alice and Bob exchange a shared secret?. Offline. Doesn’t scale. Using specially crafted messages (. Diffie. -Hellman). Using a trusted third party (KDC). Secrets should never be sent in clear. Each detector builds a local distributed system. We try to keep subsystems on separate computers (HV, LV, FEE..) . Central DCS systems connect to all WINCC systems in ALICE. Scattered systems used for UI (central operator UI, alert screen, displays in control center, expert .