public key cryptography and message authentication

... Approaches to Message Authentication • Secure Hash Functions and HMAC • Public- Key Cryptography Principles • Public- Key Cryptography Algorithms • Digital Signatures • Key Management Henric Johnson Authentication ... Approaches to Message Authentication • Authentication Using Conventional Encryption – Only the sender and receiver should share a key • Message Authentication without Message Encryption – An authentication ... Encryption algorithm Public and private key Ciphertext Decryption algorithm Henric Johnson 15 Encryption using Public- Key system Henric Johnson 16 Authentication using PublicKey System Henric Johnson...

Ngày tải lên: 29/03/2014, 16:20

... and CA2(KuCA1) Bob:  Uses CA2’s public key to verify CA1’s public key  Uses CA1’s public key to verify Alice’s public key J Wang Computer Network Security Theory and Practice Springer 2009 A CA ... store and manage these public and private keys?  Private -key rings   A table in which each row represents a record of a particular user: key ID, owner’s name, public key, encrypted private key, ... secret keys for conventional encryption algorithms and other short messages for authentication J Wang Computer Network Security Theory and Practice Springer 2009 Master Keys and Session Keys ...

Ngày tải lên: 17/02/2014, 14:20

... key cryptography Public- Key Cryptography • public- key/ two -key/ asymmetric cryptography involves the use of two keys: • a public- key, which may be known by anybody, and can be used to encrypt messages, ... a message & claiming is sent by sender Public- Key Cryptography • probably most significant advance in • • • • the 3000 year history of cryptography uses two keys – a public key and a private key ... verify signatures cannot decrypt messages or create signatures Public- Key Cryptography Why Public- Key Cryptography? • developed to address two key issues: • key distribution – how to have secure...

Ngày tải lên: 29/03/2014, 15:20

... institution key management Based on 3DES/2 with two initial keys K and K2, and an initial vector V0 Two special 64-bit binary strings T i and Vi:  Ti represents the current date and time, updated ... S(S-1(w)) = w and S-1(S(w)) = w J Wang Computer Network Security Theory and Practice Springer 2009 AES-128 Round Keys Let K = K[0,31]K[32,63]K[64,95]K[96,127] be a 4-word encryption key  AES expands ... Encryption Standard 2.3 Multiple DES 2.4 Advanced Encryption Standard 2.5 Standard Block-Cipher Modes of Operations 2.6 Stream Ciphers 2.7 Key Generations J Wang Computer Network Security Theory and Practice...

Ngày tải lên: 17/02/2014, 14:20

... Session keys are usually keys of a secret -key cryptosystem Master keys are usually used for longer time and need therefore be carefully stored.Master keys are usually keys of a public- key cryptosystem ... infeasible for others Analogy: Secret -key cryptography Put the message into a box, lock it with a padlock and send the box Send the key by a secure channel Public- key cryptography Open padlocks, for ... send a message to Bob they first agree, using a public key cryptography, on a method of sampling bits from the satellite outputs Alice and Bob use this method to generate a random key and they...

Ngày tải lên: 11/07/2014, 20:21

... the modern setting of cryptology They are symmetric key schemes for fast encryption and decryption, and public key schemes for key exchange and protocols In this thesis, we investigate certain ... 44 Public Key Systems in Extension Fields 4.1 Introduction 47 4.1.1 4.2 4.3 47 Public Key Cryptography 48 Trace-Based Cryptography ... relation to arithmetic and computation in finite fields We will mainly study efficient field arithmetic in public key cryptography, and algebraic attacks as part of symmetric key cryptanaylsis 1.1.1...

Ngày tải lên: 07/08/2017, 15:59

... curves modulo a Prime Example 13 points in total An Example to compute doubling ElGamal encryption and decryption using elliptic curve  ...

Ngày tải lên: 20/12/2017, 08:50

... chmod 700 ~/.ssh cat id_rsa.pub >> ~/.ssh/authorized_keys chmod 600 ~/.ssh/authorized_keys mv id_rsa.pub ~/.ssh logout We have to delete the public key on the desktop, because otherwise the SSH client ... make sure that key- based authentication is working out-of-the-box Sit down in front the server (so don't log in remotely as we have to restart the SSH later ) and type these commands manually ... command: rm id_rsa.pub And then we log back: ssh remoteuser@remotehost If we've done everything precisely as detailed above, then you'll be asked for the passphrase Type it, then you are in and...

Ngày tải lên: 03/07/2014, 16:21

... family life and sexuality, mental and emotional health, injury prevention and safety, nutrition and weight problems, substance use and abuse, personal health, and the prevention and control of ... science knowledge and techniques that are relevant to the understanding of physical health and illness and the application of this knowledge and these techniques to prevention and treatment, as ... years of age and older from the community and health organizations to discuss and share health information and community concerns and issues about the exposure to hazardous substances and how they...

Ngày tải lên: 05/10/2012, 09:47

... domain, and then click OK q In the Certification Authority page, verify the CA and computer names, and then click Next r s View and install the certificate In the Certificate Friendly Name and Description ... All Rights Reserved Designing a Public Key Infrastructure Tasks Detailed Steps Verify the installation of the certificate x In the console tree, expand Personal, and then click Certificates y In ... Designing a Public Key Infrastructure Tasks Request a new certificate named Web Client that uses Microsoft Base Cryptographic Provider v1.0 as the cryptographic service provider and that uses...

Ngày tải lên: 19/10/2013, 02:15

... (2000) Public conceptions of mental illness in 1950 and 1996: what is mental illness and is it to be feared? Journal of Health and Social Behavior, 41, 188–207 197 Public attitudes, stigma and ... 1998; Nunnally, 1961) and over most of this time public attitude surveys have been carried out (Cumming and Cumming, 1965; Star, What the Public Thinks About Mental Health and Mental Illness, Paper ... relatively authoritarian personality, and among people who believe that the world is basically just (and so people get what they deserve) (Crandall and Eshleman, 2003; Crandall et al., 2002) Such emotional...

Ngày tải lên: 01/11/2013, 09:20

... Questions, and Problems 263 Chapter Public- Key Cryptography and RSA 266 9.1 Principles of Public- Key Cryptosystems 269 9.2 The RSA Algorithm 277 9.3 Recommended Reading and Web Sites 291 9.4 Key Terms, ... exponentiation, discrete logarithm, and Chinese remainder theorem • Chapter — Public- Key Cryptography And RSA: RSA encrypt/decrypt and signing • Chapter 10 — Other Public- Key Cryptosystems: Diffie-Hellman, ... cryptographic hash functions: message authentication codes and digital signatures Part Four: Mutual Trust: Covers key management and key distribution topics and then covers user authentication techniques...

Ngày tải lên: 07/12/2013, 11:53

... Stuart S Nagel 54 Handbook of Regulation and Administrative Law, edited by David H Rosenbloom and Richard D Schwartz 55 Handbook of Bureaucracy, edited by Ali Farazmand 56 Handbook of Public Sector ... Handbook of Administrative Communication, edited by James L Garnett and Alexander Kouzmin 64 Public Budgeting and Finance: Fourth Edition, edited by Robert T Golembiewski and Jack Rabin 65 Handbook ... Lynch and Todd J Dicker 67 Handbook of Public Finance, edited by Fred Thompson and Mark T Green 68 Organizational Behavior and Public Management: Third Edition, Michael L Vasu, Debra W Stewart, and...

Ngày tải lên: 15/02/2014, 19:20

... of public keys: – Public announcement – Publicly available directory – Public key authority – Public key certificates Public Announcement  Idea: Each person can announce or broadcast their public ... shared key?  Two types of key establishment: – Key Agreement – Key Distribution Key Distribution  Key Agreement protocols: the key isn’t determined until after the protocol is performed  Key ... pretend to be User A, but really announce User B’s public key Public Directory Service  Idea: Have a public directory or “phone book” of public keys This directory is under the control/maintenance...

Ngày tải lên: 17/02/2014, 15:20

... and Web Sites 195 Section 8.7 Key Terms, Review Questions, and Problems 196 Chapter Public- Key Cryptography and RSA 199 Section 9.1 Principles of Public- Key ... authentication and key management Part Two: Public- Key Encryption and Hash Functions: Provides a survey of public- key algorithms, including RSA (Rivest-Shamir-A delman) and elliptic curve It also covers public- key ... Review Questions, and Problems Chapter Public- Key Cryptography and RSA Section 9.1 Principles of Public- Key Cryptosystems Section 9.2 The RSA Algorithm Section 9.3 Recommended Reading and Web Sites...

Ngày tải lên: 18/02/2014, 08:20

... United Nations and serves as the main economic and social development centre for the United Nations in Asia and the Pacific Its mandate is to foster cooperation between its 53 members and associate ... Tjerah Leonardo KEY ECONOMIC DEVELOPMENTS AND PROSPECTS IN THE ASIA-PACIFIC REGION 2008 United Nations ESCAP New York, 2007 ECONOMIC AND SOCIAL COMMIS SION FOR ASIA AND THE PACIFIC i KEY ECONOMIC ... somewhat reduced growth North and Central Asia experienced rapid and broad-based growth from energy exports and domestic demand supported by energy revenues South and South-West Asia benefited...

Ngày tải lên: 21/02/2014, 01:20

... – Public component and a private component – Two kinds: ● ● – Public key distribution: establish shared key first Public key cryptography: use public/ private keys in encryption/decryption Public ... Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005 Public- Key Systems ● Shared -key ==> difficulties in key distribution – ● C(n,2) = O(n^2) keys Public key system ... O(n^2) problem with key distribution – – Key Distribution Centre (KDC): all eggs in one basket – ● Link encryption Multiple KDCs: better security Key management easier in public key cryptography Fundamentals of Wired and Wireless Networks, Kameswari Chebrolu and Bhaskaran Raman, 09­13 May 2005...

Ngày tải lên: 05/03/2014, 23:20

... 113 Reconfiguring Public Administration The changing face of public administration E -public administration? 115 116 123 Speed, Time and the Future Technology and time E-government and time intensification ... e-government can and does generate new insights into the way in which we think about and design public and social policy, how government policy and services are implemented and managed, the relationship ... and Government 27 domain of reality, and to establish ‘in the world of persons and things’ spaces and devices for acting upon those entities of which they dream and scheme (1990a: 8) Miller and...

Ngày tải lên: 06/03/2014, 06:21

... on public sector reforms This series distills current wisdom and presents tools of analysis for improving the efficiency, equity, and efficacy of the public sector Leading public policy experts and ... governance; and a framework for responsive and accountable governance Fiscal Management Budgeting and Budgetary Institutions Public Services Delivery Local Budgeting Public Expenditure Analysis Local Public ... voice and exit; methods of evaluating public sector programs; frameworks for responsive and accountable governance; and fiscal federalism and local governance This series will be of interest to public...

Ngày tải lên: 06/03/2014, 10:20