Information Security: Goals and Enabling Technologies
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1 Information Security: Goals and Enabling Technologies Ali E. Abdallah Professor of Information Security Birmingham City University With thanks to Professors Anne Flanagan and Ian Walden
2 Lectures are part of the project: ConSoLiDatE Multi-disciplinary Cooperation for Cyber Security, Legal and Digital forensics Education Funded by December 2014-March 2016
3 ConSoLiDatE Objectives Development of educational resources conveying essential: Ø Cyber security knowledge Ø Legal principles Ø Practical digital forensic investigations Provision of supportive resources for flexible student learning Consolidation of links between theory and practice through practical scenarios. 3
4 Introductory remarks Why Cyber Security and Law? Collaboration between the two communities is much needed. Ø We live in a digital world; Technology constantly changing; Ø Criminal law evolves through many centuries but cyber law is very young; Ø New national/eu/us laws emerge, we need to understand their implications. We often use the same vocabulary but mean different things! Ø Concepts of proof, authorisation, etc..
5 Why Cyber Security and Law? Legal appreciation is important for cyber security specialists serious implications arise from: Ø Testing; ethical hacking; Ø Personal data; privacy Ø Server locations for processing personal information Cyber knowledge exceedingly important for lawyers: Ø Most new crimes involve cyber evidence (more than 90%) Ø Formulating service level agreements rely on understanding cyber risks Ø Protecting client information
6 Outline Motivation Ø Examples of Assets, threats and impacts What is information Security about? Ø Protection, Detection and Reaction Goals of Information Security Ø Confidentiality, Integrity, Availability Enabling concepts, mechanisms and technologies Case study Summary
7 Needs for Information Security Information security is as necessary as physical security; just as a business locks the doors to its offices it must also take steps to protect its information assets. Information security is a business enabler that provides a protected context in which commerce can occur while still protecting intellectual property and customer data. The value of information security cannot always be established in hard cost; if a countermeasure is purely preventative then ROI may be measured by performing a cost/benefit analysis
8 Security Attacks are Frequent Headline News!
9 Flight Simulator Site Destroyed! One of the oldest web sites, with millions of users, was destroyed! No contingency plan! technology/ stm
10 Ashley Madison With millions of users, security was breached August 2015! Weak password protection and poor security of core functionalities technology/ stm
11 Impact of Recent Ashley Madison Hack Founder and Chief executive stepped down. Reported suicides of two individuals associated with website! Reputation in ruin! q=ashley%20madison
12 Attacks on a country s infrastructure In May 2007, Estonia was hit by Moscow Cyber War. The hacking principle is very simple- you just send a shed load of requests simultanously! world/europe/ stm
13 Cost of Estonia s attack Considered a declaration of war. Services in the whole country came to a halt for thee weeks world/europe/ stm
14 Attacks on a personal September 2007: Hackers infiltrate Sarah Palin s personal Yahoo . Attackers exploited the password resetting system of Yahoo service.! world/americas/ stm
15 Results of the Attack Personal and official messages and photos were posted online. Mrs Palin was investigated for alleged abuse of power. She claimed to have lost vice-presidential race because of this breachl Hacker was sentenced for one year. world/americas/ stm
16 Attacks on a country s infrastructure November 2010, Stuxnet worm hit Iran s nuclear installations. Very sophisticated and carefully targeted attack. technology/ stm
17 Secondhand computers Details of one millions bank customers found!
18 So far.. We have illustrated a number of cyber attacks involving a variety of: Ø targets, Ø sources, Ø intensity, Ø Sophistications, capabilities Ø effects, severity or impacts. Ø motivations Attackers only need to find a single weakness!
19 Security Challenges Computer security is not as simple as it might first appear to the novice Attackers only need to find a single weakness, the developer needs to find all weaknesses Users and system managers tend to not see the benefits of security until a failure occurs. Security is often an afterthought to be incorporated into a system after the design is complete. Thought of as an impediment to efficient and user-friendly operation.
20 Information Security Strategy
21 What are the security objectives? Prevention: take measures that prevent your assets from being damaged Detection: take measures so that you can detect when, how, and by whom an asset has been damaged Reaction: take measures so that you can recover your assets or to recover from a damage to your assets 21
22 Private Property Example Prevention: locks at doors, window bars, walls round the property Detection: burglar alarms, closed circuit TV, discovery of missing stolen items. Reaction: call the police, replace stolen items, make an insurance claim Introduction 22
23 E-Commerce Example Prevention: encrypt your orders, rely on the merchant to perform checks on the user, don t use the Internet (?) Detection: an unauthorized transaction appears on your credit card statement Reaction: complain, ask for a new card number, consult your lawyer, etc. Introduction 23
24 Examples of Cyber Security Threats Malicious software: Viruses; Worms; Trojans; Identity theft Ø Password crackers Ø Phishing Ø Spoofing / masquerading Ø Social engineering Unauthorized Access Ø Eavesdropping and tapping Ø targeted data mining Ø Back door/trap door Denial of service (DoS, DDoS) Ø Logic bombs Ø Crypto-locker
25 Information Security Goals
26
27 Goals of Security: CIA Defined Confidentiality - the protection of information from unauthorized or accidental disclosure Integrity assures information is as entered and intended; that the information has not been incorrectly modified, corrupted or destroyed. Availability- assures that assets are available when needed to support the organizational enterprise on a timely and reliable basis.
28 Computer Security? Confidentiality: prevent unauthorised disclosure of information Integrity: prevent unauthorised modification of information Availability: prevent unauthorised withholding of information or resources Other aspects: accountability, authenticity Introduction 28
29 Confidentiality Historically, security and secrecy were closely related. Sometimes, security and confidentiality are used as synonyms Prevent unauthorised disclosure of information (prevent unauthorised reading) Privacy: protection of personal data Secrecy: protection of data belonging to an organisation Introduction 29
30 Integrity ITSEC: prevent unauthorised modification of information (prevent unauthorised writing) Clark & Wilson: No user of the system, even if authorized, may be permitted to modify data items in such a way that assets or accounting records of the company are lost or corrupted. Orange Book: Data Integrity - The state that exists when computerized data is the same as that in the source document and has not been exposed to accidental or malicious alteration or destruction. (Integrity synonymous for external consistency.) Introduction 30
31 Integrity ctd. Integrity in communications: detection (and correction) of intentional and accidental modifications of transmitted data In the most general sense: make sure that everything is as it is supposed to be; the data in a computer system should correctly reflect some reality outside the computer system. Integrity is a prerequisite for many other security services. Operating systems security has a lot to do with integrity. Introduction 31
32 Availability CTCPEC: the property that a product s services are accessible when needed and without undue delay IS : the property of being accessible and usable upon demand by an authorised entity Denial of Service (DoS): The prevention of authorised access of resources or the delaying of time-critical operations Introduction 32
33 Information Assurance Wider scope includes: people, resources, technology and processes. People Focus on understanding and applying good practices to achieve a holistic view of protection. Processes Practices Systems & Resources
34 Questions???
35 Enabling Technical Concepts and Mechanisms
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