Xem 1-20 trên 90 kết quả Encryption system
  • Classified along three independent dimensions: The type of operations used for transforming plaintext to ciphertext The number of keys used symmetric (single key) asymmetric (two-keys, or public-key encryption) The way in which the plaintext is processed

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  • After studying this chapter, you should be able to: Identify and explain controls designed to protect the confidentiality of sensitive corporate information; identify and explain controls designed to protect the privacy of personal information collected from customers, employees, suppliers, or business partners; explain how the two basic types of encryption systems work.

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  • Chapter 9 - Information systems controls for system reliability— Part 2: Confidentiality and privacy. After studying this chapter, you should be able to: Identify and explain controls designed to protect the confidentiality of sensitive corporate information; identify and explain controls designed to protect the privacy of personal information collected from customers, employees, suppliers, or business partners; explain how the two basic types of encryption systems work.

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  • The Security Problem Program Threats System and Network Threats Cryptography as a Security Tool User Authentication Implementing Security Defenses Firewalling to Protect Systems and Networks Computer-Security Classifications An Example: Windows XP To discuss security threats and attacks To explain the fundamentals of encryption, authentication, and hashing To examine the uses of cryptography in computing To describe the various countermeasures to security attacks

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  • Security Attack: Any action that compromises the security of information. Security Mechanism: A mechanism that is designed to detect, prevent, or recover from a security attack. Security Service: A service that enhances the security of data processing systems and information transfers. A security service makes use of one or more security mechanisms.

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  • Block ciphers are among the most widely used types of cryptographic algorithms provide secrecy and/or authentication services in particular will introduce DES (Data Encryption Standard)

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  • key concerns are confidentiality and timeliness to provide confidentiality must encrypt identification and session key info which requires the use of previously shared private or public keys need timeliness to prevent replay attacks provided by using sequence numbers or timestamps or challenge/response

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  • Effective means of protection a local system or network of systems from network-based security threats while affording access to the outside world via WAN`s or the Internet.Effective means of protection a local system or network of systems from network-based security threats while affording access to the outside world via WAN`s or the Internet

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  • Any message written over a fixed set of symbols can be represented as a binary string (a sequence of 0's and 1's) Binary digits 0 and 1 are called bits To reduce computation overhead, encryption algorithms should only use operations that are easy to implement For a binary string X: The length of X, denoted by |X|, is the number of bits in X If |X| = l, X is an l-bit binary string Let a be a binary bit and k a non-negative integer. Denote by ak a binary string consisting of k copies of a Denote the concatenation of X and Y by XY or...

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  • After completing this chapter, students will be able to: Describe how the types of encryption, hashes, and digital signatures work together to provide confidentiality, integrity, and authentication; describe the mechanisms to ensure data integrity and authentication; describe the mechanisms used to ensure data confidentiality.

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  • This chapter includes contents: To discuss security threats and attacks; to explain the fundamentals of encryption, authentication, and hashing; to examine the uses of cryptography in computing; to describe the various countermeasures to security attacks.

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  • For distributed systems and networks, we often should assume that there are adversaries Everywhere in the network Adversary may: eavesdrop, manipulate, inject, alter, duplicate, reroute, etc… Adversary may control a large number of network nodes that are geographically separated Dolev-Yao Threat Model: A very powerful adversarial model that is widely accepted as the standard by which cryptographic protocols should be evaluated Eve, the adversary, can: Obtain any message passing through the network Act as a legitimate user of the network (i.e.

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  • Security in Information Systems: Chapter 4 - Cryptography & Key Exchange Protocols includes CryptographyCryptography -related conceptsrelated concepts, Key channel for symmetric cryptosystems, Perfect encryption, Dolev-Yao threat model, Protocol “message authentication”, Protocol “challenge-response”, Public-key cryptosystems.

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  • Database Systems: Lecture 12 - Database Security An Introduction Introduction to Database Security Issues, Discretionary Access Control, Mandatory Access Control, RBAC (Role-Based Access Control), Encryption & PKI (Public Key Infrastructure).

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  • Chapter 5 (part 1) include objectives: Explain general cryptography concepts, explain basic hashing concepts, basic encryption concepts, explain and implement protocols, explain core concepts of public key cryptography.

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  • Chapter 9 includes content: Introduction to database security, discretionary access control (DAC), mandatory access control (MAC), role-based access control (RBAC), encryption & public key infrastructure (PKI), common attacks on databases, SQL injection, challenges of database security.

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  • This chapter includes content: Introduction to database security, discretionary access control (DAC), mandatory access control (MAC), role-based access control (RBAC), encryption & public key infrastructure (PKI), common attacks on databases, SQL injection, challenges of database security.

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  • Security and protection measures together ensure that only authorized users can access a file. This chapter discusses different kinds of security and protection threats in an operating system, measures used to thwart these threats, and the role played by the encryption technique in implementing these measures.

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  • Bảo mật là một vấn đề lớn đối với tất cả các mạng trong môi trường doanh nghiệp ngày nay. Hacker và Intruder (kẻ xâm nhập) đã nhiều lần thành công trong việc xâm nhập vào mạng công ty và đem ra ngoài rất nhiều thông tin giá trị. Đã có nhiều phương pháp được phát triển để đảm bảo cho hạ tầng mạng và giao tiếp trên Internet như: sử dụng firewall, encryption (mã hóa), VPN (mạng riêng ảo)… trong đó có hệ thống phát hiện xâm nhập.

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  • Tuyển tập Báo cáo Hội nghị Sinh viên Nghiên cứu Khoa học lần thứ 8 Đại học Đà Nẵng năm 2012 APPLICATION SOCKET PROGRAMMING AND RSA PUBLIC ENCRYPTION SYSTEM FOR BUILDING CHAT PROGRAMS SVTH: Huỳnh Quang Hiếu Lớp 09N, Khoa Công nghệ Thông tin, Trường CĐ Công nghệ Thông tin, Đại học Đà Nẵng GVHD: Trần Thu Thủy Khoa Công nghệ Thông tin, Trường CĐ Công nghệ Thông tin, Đại học Đà Nẵng TÓM TẮT Hiện nay, các chương trình Chat đã trở thành một chương trình phổ biến của một đại bộ phậ...

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