PPT-Chapter-2 Classical Encryption

Techniques Symmetric Cipher Model Basic terminology Plaintext original message to be encrypted Cipher text the encrypted message Enciphering or encryption Algorithm The process of converting plaintext into cipher text. CBC paddings attacks. Online Cryptography Course Dan Boneh. Recap. Authenticated encryption. : CPA security + . ciphertext. integrity. C. onfidentiality in presence of . CSE 5351: Introduction to Cryptography. Reading assignment:. Chapter 2. Chapter 3 (sections 3.1-3.4). You may skip proofs, but are encouraged to read some of them.. 2. Computational Difficulty (One-Way Functions). 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. Name : . Maryam Mohammed . Alshami. ID:. H00204657. Encryption. : . is the process of encoding messages or information in such a way that only authorized parties can read it. .. Important part of computing to keep our file . usna. . si110. Symmetric Encryption Limitations. Symmetric encryption algorithms use the . same key for encryption and decryption. Both parties must agree to a secret key. Fundamental limitation. How do you exchange a secret key?. Constructions from ciphers and MACs. Online Cryptography Course Dan Boneh. … but first, some history. Authenticated Encryption (AE): introduced in . 2000 . Chris Edwards. IT Services. “All . confidential data . must . be encrypted where stored on a mobile . device” . Mobile Device Encryption Policy. What do we mean by “encrypted” ??. Password Protected. Student name: Lindokuhle Duma. Supervisor: Prof. Tucker. Proposed overall solution. P. attern authentication. Visual for Deaf users instead of text . Deaf people are accustomed to signed language. Easy to remember visuals than text [1]. What it. is. Alice sends. a encrypted message to X (e.g. a cloud service). Public key ‘belongs to’ X. X cannot decrypt the message. But X can convert messages. Forward message to B, C, D using re-encryption. Public Private Key Encryption. HTTPS. Encryption. String Encryption. You have an account on . facebook. , LinkedIn, YouTube etc. . Your login: . costanza@seinfeld.com. Your password is : . bosco. If this data was stored in a database, it might look like:. 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. 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. Dana . Dachman. -Soled. University of Maryland. Deniable Public Key Encryption. [Canetti, . Dwork. , . Naor. , . Ostrovsky. , 97]. Sender. Receiver.  .  . s.  . For any . in the message space, can produce a . 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