PPT-Identity Based Encryption

Debdeep Mukhopadhyay Associate Professor Dept of Computer Sc and Engg IIT Kharagpur Public Key Setting Alice and Bob might not have a prior shared secret Each participant has a pair of public and private key for certain prespecified cryptosystem or signature scheme. Security. Identity-based Encryption. 1. Dennis Kafura – CS5204 – Operating Systems. Diffie. -Hellman Key Exchange. How can two parties come to possess a shared secret using only insecure channels of communication?. Team 2.0. Nayan Thakkar, Eddie Gallon, David Kotar, . Bruce Malone and Pamela Dorman. Requirements for Solution. Support for: . Mid size company "X" with ~250 employees. Windows network with Exchange 2010 w/350 mailboxes. (for now). Online Cryptography Course Dan Boneh. Quick Review: primitives. PRG. PRF, PRP. MAC. GGM. CTR. CMAC, HMAC. PMAC. Collision. resistance. k. ey exchange. Abstract. Attribute-based encryption (ABE) is a public-key- based one-to-many encryption that allows users to encrypt and decrypt data based on user attributes. A promising application of ABE is flexible access control of encrypted data stored in the cloud, using access polices and ascribed attributes associated with private keys and . Vadim . Lyubashevsky. Cryptography. Allows for secure communication in the presence of malicious parties. 2. Cryptography. Allows for secure communication in the presence of malicious parties. 3. Cryptography. David Kauchak. CS52 – . Spring 2016. Admin. Assignment 6. Survey: respondents. 24 total respondents. Survey: “How is the class going?”. Survey: “How is the difficulty of the class?”. Survey: time spent per week. Cryptography. Is:. A tremendous tool. The basis for many security mechanisms. Is not:. The solution to all security problems. Reliable unless implemented and used properly. Something you should try to invent yourself. Vadim . Lyubashevsky. Cryptography. Allows for secure communication in the presence of malicious parties. 2. Cryptography. Allows for secure communication in the presence of malicious parties. 3. Cryptography. Diffie. -Hellman. The . ElGamal. . Public-key System. Online Cryptography Course Dan Boneh. Recap: public key encryption: . (Gen, E, D). E. D. pk. m. c. c. m. Crypto Concepts Symmetric encryption, Public key encryption, and TLS Cryptography Is: A tremendous tool The basis for many security mechanisms Is not: The solution to all security problems Reliable unless implemented and used properly Authenticated Encryption and Cryptographic Network Protocols David Brumley dbrumley@cmu.edu Carnegie Mellon University Some Straw Men 2 TCP/IP (highly abstracted) packet Destination Machine TCP/IP Stack B. ounded-. R. etrieval . M. odel. Joël. Alwen, . Yevgeniy. . Dodis. , . Moni. . Naor. , Gil . Segev. , . Shabsi. . Walfish. , Daniel . Wichs. . Speaker: Daniel . Wichs. Eurocrypt. Dennis Hofheinz, . Jessica Koch. , Christoph Striecks. Karlsruhe Institute of Technology, Germany. 1. Overview. Identity-. B. ased Encryption (IBE). Tight Security. U. nderlying IBE-Scheme by Chen and Wee. Susan . Hohenberger. . George Lu. Brent Waters David Wu. Attribute Based Encryption [SW05, GPSW06]. pk. sk. faculty. + CS. sk. faculty. + math. sk. student. + CS. ct. CS.