cryptographic data integrity protection key exchange and user authentication mechanisms

... Message Authentication • Secure Hash Functions and HMAC • Public -Key Cryptography Principles • Public -Key Cryptography Algorithms • Digital Signatures • Key Management Henric Johnson Authentication ... Only the sender and receiver should share a key • Message Authentication without Message Encryption – An authentication tag is generated and appended to each message • Message Authentication Code ... at a certain time or sequence • Protection against active attack (falsification of data and transactions) Henric Johnson Approaches to Message Authentication • Authentication Using Conventional...

Ngày tải lên: 29/03/2014, 16:20

... Communication Privacy and Data Integrity Using Digital Signatures User A User B Data Data Data Data Hash algorithm Hash algorithm Hash algorithm Hash algorithm User B User B User B User B Hash value ... transfer a key User A User A Session key User A User A Private key Private Public key Encrypt " ! Session key Encrypt Use symmetric encryption for the remainder of the session Storing keys " ACL ... Integrity 11 Verifying Data Integrity with Hashes User B User A Data Data Hash value Hash value Hash algorithm Hash algorithm Data Data Hash algorithm Hash algorithm Data Data Hash value Hash value...

Ngày tải lên: 24/01/2014, 10:20

... the ECG that makes it a prime candidate for good security As already mentioned, good cryptographic keys need a high degree of randomness, and keys derived from random time-varying signals have ... v[n] 10 15 20 25 Ideal key (from same sensor) Correct key (from same BSN) Incorrect key (without key optimization) Incorrect key (with key optimization) Figure 9: INTRAS data scrambling, with ... 40 30 30 20 20 10 10 10 15 20 25 Ideal key (from same sensor) Correct key (from same BSN) Incorrect key (without key optimization) Incorrect key (with key optimization) To account for the channel...

Ngày tải lên: 22/06/2014, 00:20

... image are also coded and represented independently within the data stream Elements of the JPEG2000 compressed data stream form a tree structure, as depicted in Figure The data stream header becomes ... practical applications, the size of the data source is large and packet sizes must be relatively small, leading to the need for long and computationally demanding channel codes Two solutions to ... streams,” in Proc IEEE Data Compression Conference, pp 73–82, Snowbird, Utah, USA, April 2002 [11] V Stankovic, R Hamzaoui, and Z Xiong, “Packet loss protection of embedded data with fast local...

Ngày tải lên: 23/06/2014, 01:20

... (Boyer, 1976) and in ribulose-biphosphate carboxylase-oxygenactivity (Vu et al, 1987) Leaf gas exchange measurements and analysis using diffusion models (Jones, 1973, 1985; Farquhar and Sharkey, 1982) ... C ) i relationships (Jones and Fanjul, 1983; et al, 1986; Ögren and Öquist, 1985; Kirschbaum, 1987; Cornic et al, 1987; Grieu et al, 1988) Farquhar and Teskey Sharkey (1982) have also reported ... 400W, Philips), and monitored with a quantum sensor (Li 190SB, LiCor) Regulations and data acquisition were monitored by an application stored in a computer (AT3, IBM) via a data logger (SAM...

Ngày tải lên: 09/08/2014, 03:24

... nature of academia, the key requirement is not to prevent unauthorized access at all costs, but rather to maintain the integrity and robustness of data and scientific results and to ensure this for ... consistent with the key goal of security in academia: to preserve data and results for posterity reviews There are common and effective lines of defense, such as firewalls and antivirus software, ... large and widespread attacks And there have been real and significant cases of data loss The New York Times recently reported on a successful attack involving hundreds of computers in government and...

Ngày tải lên: 14/08/2014, 14:22

... biometric data is extremely important to guarantee the privacy of the users, and it is important that the biometric data is not stored in the system A key challenge in protecting biometric data as user ... consider two types of datasets, spatial datasets and dynamic datasets, and show that the noise level can be further reduced by constructions that exploit the δ-neighbourhood, and the utility can ... thesis, we look into protections on biometric data Biometric data are potentially useful in building secure and easy-to-use security systems A biometric authentication system enrolls users by scanning...

Ngày tải lên: 10/09/2015, 09:01

... @NewAddress, Phone = @NewPhone WHERE ID = @OriginalID If User A and User B are both updating the record at the same time, with User A modifying Address and User B correcting Phone, the “last one wins” rule ... existing SqlCommand object SqlCommand updateCommand = new SqlCommand(sqlText, linkToDB); updateCommand.Transaction = envelope; Visual Basic ' - Include the transaction in the SqlCommand constructor ... Dim updateCommand As New SqlCommand(sqlText, linkToDB, envelope) ' - Or add it to an existing SqlCommand object Dim updateCommand As New SqlCommand(sqlText, linkToDB) updateCommand.Transaction...

Ngày tải lên: 03/10/2013, 00:20

... follows The user s immediate personal information: user. bdate user. gender user. employer user. department user. jobtitle The user s identifying information: user. name.prefix user. name.given user. name.family ... user. name.family user. name.middle user. name.suffix user. name.nickName The user s personal address information: user. home-info.postal.name user. home-info.postal.street user. home-info.postal.city user. home-info.postal.stateprov ... Personalization and User Attributes The user s personal fax details: user. home-info.telecom.fax.intcode user. home-info.telecom.fax.loccode user. home-info.telecom.fax.number user. home-info.telecom.fax.ext user. home-info.telecom.fax.comment...

Ngày tải lên: 05/10/2013, 04:20

... 7: Implementing Data Integrity Activity 7.2: Determining Business and Data Integrity Implementations Implementing Business Rules and Data Integrity Activity 7.1: Identifying Data Integrity Requirements ... data integrity rules and ways of enforcing them " Data Integrity Categories " Referential Integrity " Data Validation " Identifying Data Integrity Requirements " Activity 7.1: Identifying Data Integrity ... given data integrity requirement 148 Module 7: Implementing Data Integrity ! Overview of Data Integrity Slide Objective To provide an overview of data integrity Lead-in This section discusses data...

Ngày tải lên: 18/10/2013, 19:15