In a group of 23 people, the probability that there are at least two persons on the same day in the same month is greater than 1/2
Proof. The probability that none of the 23 people has the same birthday is:
Requirements - must be able to verify that:
1. Message came from apparent source or author,
2. Contents have not been altered,
3. Sometimes, it was sent at a certain time or sequence.
Protection against active attack (falsification of data and transactions)
Chapter 14 - Network security: Firewalls and VPNs. In this chapter, we look at four issues of security: privacy, authentication, integrity, and nonrepudiation. We show how the first can be achieved through secret-key or private-key encryption. We discuss a concept called digital signature that satisfies the three other conditions. We talk about how security is implemented in the Internet.
Welcome to the Oracle Database Advanced Security Administrator's Guide for the
10g Release 1 (10.1) of Oracle Advanced Security.
Oracle Advanced Security contains a comprehensive suite of security features that
protect enterprise networks and securely extend them to the Internet. It provides a
single source of integration with multiple network encryption and authentication
solutions, single sign-on services, and security protocols.
The Oracle Database Advanced Security Administrator's Guide describes how to
implement, configure and administer Oracle Advanced Security....
This book begins with you working along as Scott Guthrie builds a complete ASP.NET MVC reference application. He begins NerdDinner by using the File-New Project menu command within Visual Studio to create a new ASP.NET MVC Application. You'll then incrementally add functionality and features.
This book is about database security and auditing. You will learn many methods and techniques that will be helpful in securing, monitoring and auditing database environments. It covers diverse topics that include all aspects of database security and auditing - including network security for databases, authentication and authorization issues, links and replication, database Trojans, etc. You will also learn of vulnerabilities and attacks that exist within various database environments or that have been used to attack databases (and that have since been fixed).
The Oracle Advanced Networking Option is an optional product that provides
enhanced functionality to SQL*Net and Net8. Its set of features provides enhanced
security and authentication to your network and enables integration with a Distributed
Computing Environment (DCE). This guide provides generic information on
all these features of the Advanced Networking Option.
For information about installation of the Oracle Advanced Networking Option and
platform-specific details of the configuration and use of its features, refer also to
your Oracle platform-specific documentation....
The methods for human identity authentication based on biometrics â€“ the physiological and behavioural characteristics of a person have been evolving continuously and seen significant improvement in performance and robustness over the last few years. However, most of the systems reported perform well in controlled operating scenarios, and their performance deteriorates significantly under real world operating conditions, and far from satisfactory in terms of robustness and accuracy, vulnerability to fraud and forgery, and use of acceptable and appropriate authentication protocols. ...
The updated Reading for Today series features a
broad range of reading materials and resources to
prepare students for academic success. The core of
the series consists of reading passages of general
and academic interest that provide a context for
vocabulary development. The student books also
contain a wealth of visual materials and nonlinear
texts such as graphs, charts, maps and photographs.
IPSec—IP Security Protocol. IPSec is a framework of open standards that provides data
confidentiality, data integrity, and data authentication between participating peers. IPSec provides
these security services at the IP layer; it uses IKE to handle negotiation of protocols and algorithms
based on local policy and to generate the encryption and authentication keys to be used by IPSec.
IPSec can be used to protect one or more data flows between a pair of hosts, between a pair of
security gateways, or between a security gateway and a host....
Cài Oracle cần như sau:
1. Tạo 2 Groups: đặc tên là oinstall và dba
2. Tạo 1 User account tên là: oracle
(note: Đúng ra đặt là Tí Tèo gì củng được, nhưng conventional, thấy thiên hạ cài Oracle hay đặt là vậy.)
Login as root, run: �
# groupadd oinstall
# groupadd dba
# useradd -m -g oinstall -G dba oracle
Tạo password cho user: oracle
# passwd oracle
Changing password for user oracle.
New UNIX password:
Retype new UNIX password:
passwd: all authentication tokens updated successfully.
Thuê bao mà không cần cung cấp truy cập cho công chúng nói chung. Mỗi thuê bao trả xác thực với Remote Authentication Dial-In User Server (RADIUS) khi đi vào một khu vực phạm vi bảo hiểm trong một cơ sở đối tác tham gia.
Windows 8 introduces a new concept called a “connected account” that provides: • The ability to “roam” your personalization settings (for example, your Lock screen picture or your desktop background) across multiple computers Single sign-on for Windows Live services that require a Microsoft account (also known as a Windows Live ID) for authentication
Customization note: This document contains guidance and/or step-by-step installation instructions that can be reused, customized, or deleted entirely if they do not apply to your organization’s environment or installation sce...
EURASIP Journal on Applied Signal Processing 2003:10, 1001–1015 c 2003 Hindawi Publishing Corporation
Watermarking-Based Digital Audio Data Authentication
Fraunhofer Institute IPSI, MERIT, C4M Competence for Media Security, D-64293 Darmstadt, Germany Email: email@example.com
Platanista GmbH and Otto-von-Guericke University Magdeburg, 39106 Magdeburg, Germany Email: firstname.lastname@example.org.
Initialization Parameter Files
In order to start an instance and open the database, you must connect as SYSDBA and enter the STARTUP command. The Oracle server will then read the initialization parameter file and prepare the instance according to the initialization parameters contained within.
Note: You must have SYSDBA privilege. Authentication and the SYSDBA privilege will be discussed in later lessons.
Users and Security
The database administrator defines the names of the users who are allowed to access a database. A security domain defines the settings that apply to the user.
A user who requires access to the database can be authenticated by one of the following:
The means of authentication is specified at the time the user is defined in the database and can be altered later. This lesson covers authentication by database and by operating system only.
Cryptography, in particular public-key cryptography, has emerged in the last 20 years as an important discipline that is not only the subject of an enormous amount of research, but provides the foundation for information security in many applications. Standards are emerging to meet the demands for cryptographic protection in most areas of data communications.
In the most commonly used scenario, IPsec allows an encrypted tunnel to be created
between two private networks. It also allows for authenticating the two ends of the tunnel.
However, the IPsec protocol allows only for the encapsulation and encryption of IP data
(unlike GRE, which can tunnel but not encrypt non-IP traffic), so to create a tunnel for non-
IP-based traffic, IPsec must be used in conjunction with a protocol such as GRE, which
allows for the tunneling of non-IP protocols.