PPT-Authenticated Encryption

Attacking nonatomic decryption Online Cryptography Course Dan Boneh SSH Binary Packet Protocol Decryption s tep 1 decrypt packet length field only s. CBC paddings attacks. Online Cryptography Course Dan Boneh. Recap. Authenticated encryption. : CPA security + . ciphertext. integrity. C. onfidentiality in presence of . AEGIS . A Fast Authenticated Encryption Algorithm. . Hongjun Wu Bart Preneel . Nanyang Technological University. KU Leuven and iMinds. SAC 2013 . 2. Outline. Authenticated Encryption (AE). design rationale. How To Secure My Data. . What . to Protect???. DATA. Data At Rest. Data at Rest Examples. Worst Culprits?. Lost. Infected Easily. Used as ‘Backup’. Lent to others. Data Corruptions more common. 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. “Encryption . and . Globalization. ” – China & India. Draft: . . Adoption of . Crypto, the Cloud, and Lawful Access - Peru. “Going . Dark vs. the Golden Age of . Surveillance”. Where you are. Schemes and Parameters. Joppe W. Bos. Microsoft Research. Contains joint work with Kristin . Lauter, . Jake Loftus and Michael Naehrig. Computing on Encrypted Data. Motivation. Outsource data and computation. Constructions from ciphers and MACs. Online Cryptography Course Dan Boneh. … but first, some history. Authenticated Encryption (AE): introduced in . 2000 . David Froot. Protecting data By encryption . How do we transmit information and data, especially over the internet, in a way that is secure and unreadable by anyone but the sender and recipient?. Encryption is simply the process of transforming information, such as plain text or numbers, using an algorithm. Only those with the algorithm can decipher the encrypted information, and even a relatively simple encryption technique can be difficult to decode without the key. . 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. Definitions. Online Cryptography Course Dan Boneh. Goals. An . authenticated encryption . system (E,D) is a cipher where . As usual: E: K × M . × . N . ⟶ C. 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 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 Cryptography Lecture 9 Arpita Patra © Arpita Patra Recall Attack on cpa -secure scheme from PRF >> cpa -security to cca -security Definitions- cma , scma , cmva , scmva >> MAC