computer system security pdf

0000001016 00000 n K�EU��y�0��茓��c�~E?��r:�7��N�~�}��!r$�eA. 165 0 obj <>stream 0000043652 00000 n 0000006318 00000 n xÚb```f``ñe`e``ÝÊ Ä Bl@ÈÂÀñy»åã FRìJ ³uý~nP×\kÏóbßU£Â£Ü úsx»,rÐü9ý%Ó®±ªÓ,ÙDÂÔ¤¼Âc=Õ#0 fn|]£rÇÕºqlö36»ðúü.g°ìcOSÑÌí²?´ T¦ÍU¹ºì°HÂò)Å>`©ÃeóB5¶ë\Ö\Ry§ô9PAûÍ>¦@ð6É\:³höêM7V'®]óñ¯þ! 0000003201 00000 n Unit 1. xref –Software is the weakest link in the security chain, with the possible exception of “the human factor” • Software security does (did?) 0000037022 00000 n ABOUT COMPUTER SECURITY Security is a state of well-being of information and infrastructure Computer security refers to the protection of computer systems and the information a user stores or processes Users should focus on various security threats and countermeasures in order to protect their information assets Hardware Elements of Security Seymour Bosworth and Stephen Cobb 5. USENIX Conference (1988). How it should be configured? 0000023454 00000 n 0000036869 00000 n 0000035801 00000 n 0000039788 00000 n 0000002878 00000 n • A security model is a representation of the security policy for the OS. 0000006853 00000 n %PDF-1.4 %âãÏÓ Example: The lock on … %PDF-1.6 %�� 0000006589 00000 n It is aimed at the professional involved with computer security, audit, control and data integrity in all sectors - industry, commerce and academia. Quiz: A hacked computer can be used to… (select all that apply) a) Record keystrokes and steal passwords. Unit 4. The Information Security Pdf Notes – IS Pdf Notes. With a lot happening on the web, it becomes an utmost need to secure the content from loss and interception as there hovers a constant vision of malice to disrupt the web world security. 232 0 obj <>stream Isn't this just an IT problem? Why do I need to learn about Computer Security? Information systems security, more commonly referred to as INFOSEC, refers to the processes and methodologies involved with keeping information confidential, available, and assuring its integrity. Security Measure Levels Security must occur at four levels to be effective: zPh i lPhysical zHuman Avoid social engineering phishing dumpster divingsocial engineering, phishing, dumpster diving zOperating System zNetwork Security is as week as the weakest chain Operating System Concepts – 8 th Edition 15.7 Silberschatz, Galvin and Gagne ©2009 Program Threats (>�� fD�(��tS��,�/@��P�� Unit 2. 0000038932 00000 n Computer security courses traditionally focus on cryptography…f be 0000043020 00000 n 0000027381 00000 n 0000036217 00000 n Consider the situation that you adopt a formal security model and the model is provably secure. 0000035627 00000 n Computer Security Applications Conference (2004): pp. Also, distributed computer systems can be developed, where several complete computer Department of Computer Engineering Computer networks & Security Lab By following the above procedures, we can crimping the network cables successfully 2). During the design and implementation of information systems should primarily take into account a set of measures to increase security and maintenance at an acceptable level of risk. computer crime 130 chapter 10.mobile risk management 139 chapter 11.best practices: building security culture 144 chapter 12.general rules for computer users 150 chapter 13.global dialogues on security 163 part 4.information security and government policies 164 chapter 1.introduction 167 chapter 2. protecting government systems 174 chapter 3. 0000042514 00000 n Computer security is one of the most important issues in organizations which cannot afford any kind of data loss. 0000043269 00000 n 107 59 Intrusion Detection System is built to protect the network from threats of hackers, crackers and security experts from the possibility of action that does not comply with the law. computer systems employ many CPUs in appropriately connected structures. Computers & Security provides you with a unique blend of leading edge research and sound practical management advice. Certiﬁed Systems Security and Operating Systems Authentication Attacks and Defenses Certiﬁed Systems Certiﬁed Systems Military Classiﬁcation Model Classiﬁcations Examples Examples Assurance The Fate of the ... Book (DoD Trusted Computer System … XYH18 �ಯ\��i�fg�~x�H�4Z��oL��9�)$�ȩ��x��?��G�N�_t�!��L�e�v��O|��?�Wq��Ҕ^�j��A�V 0000001723 00000 n 0000000016 00000 n Computer Security Tutorial in PDF - You can download the PDF of this wonderful tutorial by paying a nominal price of $9.99. Computer Security 1. 0000037155 00000 n 0000005304 00000 n %%EOF 0000042783 00000 n 0000039308 00000 n endstream endobj 114 0 obj <>stream Unit 3. Computer System and Network Security discusses existing and potential threats to computer systems and networks and outlines the basic actions that are generally taken to protect them. 0000038110 00000 n ��zLE[]`Ml��k��:Qnv��2�̚�]n��&�Xk!��睐��i��+�0γ��zC Wx��'z��k��4j⤀�1]�z1#�6�fԢ��{�|},7�ȳձ�*r��(�8�jrCh�Iy�ܗ�� 0�(��{�a�}.��1��]��|5�z3�6Tq��g(��H�0�e�G��.%�Ş��~ ��& Information Security Notes pdf – IS pdf notes – IS notes pdf file to download are listed below please check it – Information Security Notes pdf Book Link: Complete Notes. Link: Unit 3 Notes. For example, what are they allowed to install in their computer, if they can use removable storages. 0000003727 00000 n The security can be expressed as a number of well-defined, consistent and implementable rules. IT policies. 0 This new class of computers comprises multiprocessors, multicomputers, and vector supercomputers. 0000020126 00000 n 0000002924 00000 n 0000036082 00000 n 0000041254 00000 n Following are some pointers which help in setting u protocols for the security policy of an organization. Computer security is security applied to computing devices such as computers and smartphones, as well as computer networkssuch as private and public networks, including the whole Internet. Computer security Prof. dr. Frederik Questier - Vrije Universiteit Brussel Workshop for Lib@web 2015 - International Training Program @ University of Antwerp Management of Electronic Information and Digital Libraries 2. 197 0 obj <> endobj 0000002841 00000 n • A security policy is a statement of the security we expect the system to enforce. 0000010199 00000 n not get much attention –in other security courses, or –in programming courses, or indeed, in much of the security literature! These types of computer systems are discussed in detail in Section 3. 0000002017 00000 n ��ʫ�4#0 �> endobj 109 0 obj <> endobj 110 0 obj <> endobj 111 0 obj <>/ProcSet[/PDF/Text]/ExtGState<>>> endobj 112 0 obj <> endobj 113 0 obj <>stream 0000001982 00000 n 0000038515 00000 n 0000040423 00000 n Where… 0000040043 00000 n <<95502E58D17D674783D2095EC7F67286>]>> xref 0000007309 00000 n 0000002399 00000 n 3. The first two chapters of the text introduce the reader to the field of computer security, covering fundamental issues and objectives. 0000037448 00000 n Computer security is that branch of information technology which deals with the protection of data on a network or a stand-… 197 36 d) Access restricted or personal information on your computer or other systems that you have access to. † Operating system security tools INTRODUCTION When we seek to protect our data, processes, and applications against concerted attacks, one of the largest areas in which we find weaknesses is on the operating system that hosts all of these (be it a computer, router, or smartphone). 0000002971 00000 n PART I FOUNDATIONS OF COMPUTER SECURITY 1. 0000036672 00000 n 0000042235 00000 n �\]ay��s��P��`:�s�!�GP m$��l5�.�Re��f �F�'�y= �$W7��8 д�EX��j�[3�1�2�D��̒8A9!7��7!��[Ŀ��V_��j̯9?��M=(��ܾ}iB�b��3�-vP�;��j��k��z��c�s��t��e��x�o��Ʈ�z=l,��p9�/%̓��'�` �(� computer security in an abstract manner. 0000041004 00000 n How to communicate with third parties or systems? H�\��q�0D廒 #��Ge��d��%\,BI�=2B�,�,fi7k�[zm{�J��X�&� Q�6�I��Fd�.��lq��pozOĤGb:�\\%+r��jDOnDĬ&Q�T��F>�a�w�J��U��t�lw�fy7vź��nZ��㼥*�+w�� r��.��*�s%�Pns(ѹE㚡J_�U�k��]��-GU��9�=P�֊�� 0000020760 00000 n ing or adapting computer systems to provide security control or user privacy. Like it? 2. 0000039035 00000 n The DoD Computer Security Center (the Center) was formed in January 1981 to staff and expand on the work started by the DoD Computer Security Initiative. H�T�ё1D�' 0000004821 00000 n 0000004366 00000 n 0000001808 00000 n 0000002296 00000 n History of Computer Crime M. E. Kabay 3. 0000004896 00000 n 0000011455 00000 n 0000035433 00000 n Toward a New Framework for Information Security Donn B. Parker 4. 0000023569 00000 n It aims to satisfy the needs of managers and experts involved in the computer security field by providing a combination of leading edge research developments, innovations and sound Link: Unit 4 Notes. b) Send spam and phishing emails. Establish a LAN connection using three systems using bus topology AIM: Establish a LAN connection using three systems using bus topology Requirements: Pentium IV Computer Detecting system intrusions is the process of monitoring the events occurring in a computer system or network and analyzing them for signs of possible incidents, which are violations or imminent threats of violation of computer security policies, acceptable use policies, or standard security practices. 0000002901 00000 n [15] A major goal of the Center as given in its DoD Charter is to encourage the widespread availability of trusted computer systems … 5 Security Center, the official evaluator for the Defense Department, maintains an Evaluated Products List of commercial systems that it has rated according to the Criteria. 0000004246 00000 n 0000043517 00000 n Good Security Standards follow the "90 / 10" Rule: 90% of security safeguards rely on an individual ("YOU") to adhere to good computing practices; 10% of security safeguards are technical. W�8X%�1�g��7�V��\�!�5��?^tX� q| C�ҪL��#��f �� 0 0000039514 00000 n 0000006065 00000 n 0000004771 00000 n Bellovin, Steven M. "A Look Back at 'Security Problems in the TCP/IP Protocol Suite'." 0000007870 00000 n .�1�}��zյ��o�; u��YR��}��1�⇺}��f1�+hd!��Z If we do Computer security basically is the protection of computer systems and information from harm, theft, and unauthorized use 0000002208 00000 n If you then ensure that all components of your system comply with the model, you can be sure of the security of your system. Brief History and Mission of Information System Security Seymour Bosworth and Robert V. Jacobson 2. 0000005435 00000 n 0000003279 00000 n 0000038614 00000 n £JgºÜ{¡MlÛqäy°öÍ>PW}8cxc×ÛM¯2ú3zäþÙØåQ\yWÿà±f°Ã^,»õBµMQ¦"P»ÎeöE³³¡¶¼ùxâµÍ>²£Ë¢¨á°ÙG¾á Hn>"¡x-¶ ÚÆæååå @6{yÁ3L 4 Nevertheless, these officials have a limited tenure, and the issue of high-level attention is 0000038745 00000 n It is impossible to address the multitude of details that will arise in the design or operation of a particular resource-sharing computer system in an individual installation. 0000041932 00000 n Link: Unit 1 Notes. endstream endobj 115 0 obj <>stream 0000036525 00000 n 0000043409 00000 n 229–249. <]>> Link: Unit 2 Notes. Policies are divided in two categories − 1. 0000002005 00000 n 0000026914 00000 n 0000027156 00000 n protecting a local system or network of systems from network-based security threats while affording access to the outside world via wide area networks and the Internet Traditionally, a firewall is a dedicated computer that interfaces with computers outside a network and has special security … User policies 2. 0000001476 00000 n H�\�I�$!E�y 0000035491 00000 n Yes No CD, DVD, or external USB hard drive is best Only copy information you have created and stored to the hard drive Use a program like LastPass that generates a random password for sites where a password is needed I bought my last new car at Hendron Chevrolet in 08 0000003857 00000 n "Kerberos: An Authentication Service for Open Network Systems." The committee is encouraged by conversations with senior defense officials, both civilian and military, who appear to take information systems security quite seriously. 0000041487 00000 n startxref Thus, the security problem of specific computer systems must, at this point in time, systems security as an important cultural value for DOD. 1. Who should have access to the system? 0000037758 00000 n ��z4�-�:��J�T��Uz��k�A��z)R*nK`� IP\��m�Lԣ��$놦i 0000054507 00000 n Computers & Security is the most comprehensive, authoritative survey of the key issues in computer security today. �$�#y��Z��3�E��I]��U��N�I64�g�E74t��̥G��\�)J��N��A Computer security, cybersecurity or information technology security (IT security) is the protection of computer systems and networks from the theft of or damage to their hardware, software, or electronic data, as well as from the disruption or misdirection of the services they provide.. 0000010459 00000 n The Criteria is a technical document that defines many computer security concepts and … 0000013936 00000 n Lecture 13 Question (PDF) 14 0000003376 00000 n This is the area of computer security that should be give the removable media? 0000018508 00000 n 0000036380 00000 n )Á¥Í¡ZCÁ¢@JJ`a0 G¦:f»Ã8,.P-BÜ~!¬Àf$áV{àÆÂb/ï =AÏ# Ä`U~Fæ @'*05$4h2±wð;°6Ø0eÔjüÄìÆaà¾÷Cù£dT. 0000007169 00000 n 0000040214 00000 n 0000040862 00000 n x�b```f``+a`a`��``@ �+sR``��h��P��^^��6�g�ǵ!s��-�Z�n��Uo��k��癮 107 0 obj <> endobj 3 Introduction • Linux –Unix like computer OS that uses Linux kernel • created by LinusTorvaldsin 1991 • evolved into a popular alternative to Win and MAC OS • has many features and applications – desktop and server OS, embedded systems – hence wide variety of attacks possible – various security tools available • it uses Discretionary Access Control Model Share it! trailer 0000037576 00000 n 0000037949 00000 n 0000000016 00000 n 0000005817 00000 n 0000014175 00000 n 0000002278 00000 n %%EOF e) Infect other systems. trailer startxref It also refers to: Access controls, which prevent unauthorized personnel from entering or accessing a system. 0000001806 00000 n User policies generally define the limit of the users towards the computer resources in a workplace. • A formal security model is a mathematical description (formalisation) of the rules of the security policy. 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