PPT-Public key (asymmetric) cryptography

Modular exponentiation for encryptiondecryption Efficient algorithms for this Attacker needs to factor large numbers to extract key Must use bruteforce Oneway hash functions Collisionfree collisionresistant. Raymond Flood. Gresham Professor of Geometry. Overview. Key terms and guidelines. Caesar ciphers. Substitution cipher. Polyalphabetic cipher. Enigma. Modern . ciphers. Stream ciphers. Block ciphers. Diffie. SW Arch, dist sys & . interop. Lecture 17. Prof. Crista Lopes. Objectives. Trust on the Internet. Certificates & certificate authorities. Public Key Cryptography. SSL. Basic Threat: Domain Name Hijacking. Chapter 9 - . Public-Key Cryptography. Fifth Edition. by William Stallings . Lecture slides by Lawrie Brown. Why Public-Key Cryptography?. developed to address two key issues:. key distribution. – how to have secure communications in general without having to trust a KDC with your key. Manage WHO can view data . (Secrecy). Make sure data is unmodified (Authentication/data integrity). Know the origin of the data. (Non-Repudiation). Cryptography: Goals. Alice & Bob . Are two persons who want to communicate without anybody else knows the content . based symmetric and asymmetric cryptography mechanisms to protect packet integrity, and applies Neighborhood WatchDog to generate Trust Token based on instant performance to verify packet corr 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?. OGRAPHY. Dr. Andy Wu. BCIS . 4630 Fundamentals of IT Security. Overview. Key crypto concepts. Key terms. XOR. Symmetric encryption. Asymmetric encryption. Hashes. 2. Cryptography. Cryptography primarily protects confidentiality, integrity, authentication, and non-repudiation.. OGRAPHY. Dr. Andy Wu. BCIS . 4630 Fundamentals of IT Security. Overview. 2. Key crypto concepts. Key terms. XOR. Symmetric encryption. Asymmetric encryption. Hashes. Cryptography. 3. Cryptography primarily protects confidentiality, integrity, authentication, and non-repudiation.. Symmetric Encryption. Key exchange . Public-Key Cryptography. Key exchange. Certification . Why Cryptography. General Security Goal. - . Confidentiality . (. fortrolig. ). - . End-point Authentication . What is cryptography?. Ceasar. Cipher. Public key cryptography. What is cryptography?. Cryptography.  or . cryptology.  (from . Greek.  . κρυπτός.  . kryptós. , "hidden, secret"; and . UNIT 4 LESSON 7 – 2 DAY LESSON. VOCABULARY ALERT. :. asymmetric encryption.  - used in public key encryption, it is scheme in which the key to encrypt data is different from the key to decrypt. .. The . art and science of concealing the messages to introduce secrecy in . information security . is recognized as cryptography. .. The word ‘cryptography’ was coined by combining two Greek words, ‘Krypto’ . P. ublic-key encryption ( Asymmetric Encryption). Asymmetric encryption is a form of cryptosystem in which . encryption and . decryption are performed using the different keys—one a public . key and . Intergenerational . r. esource. . t. ransfers. in the . c. ontext. of . w. elfare. . s. tates. Building . Sustainable. . Generational. . Economies: The 14th NTA Global Workshop. Paris, . February.