Hacking and protecting yourself from hackers .
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The document provides an introduction to hacking and networking, focusing on intrusion detection systems (IDS) and their importance in network security. It distinguishes between two types of IDS: network-based (NIDS) and host-based (HIDS), detailing their advantages and disadvantages. Additionally, it covers definitions of hacking, types of hackers, signs of being hacked, and protection methods against hackers.
Hacking and protecting yourself from hackers .
- 1. UNIT – I INTRODUCTION TO HACKING AND NETWORKING BY, NAME : PREETHI T G REG NO :19IFTE073
- 2. CONTENT ✓ Consequences of Intrusion ✓ Indirect Threats ✓ A word on hacking and hackers
- 3. Intrusion detection • Intrusion detection is the art of discovering and identifying any intrusive activities towards the networks system. • In 1980, James P.Anderson introduced the ideas of intrusion detection and outlining ways to improve computer security auditing and surveillance . • Hence, intrusion detection system (IDS)has become very important to strengthen the security, confidentiality and integrity of critical information systems. • Detection and analysis on the impacts of the malicious activities is the main objective for intrusion detection and analysis system
- 4. What is Intrusion ? Intrusion Detection System (IDS) is a security tool that is used to detect and analyze the incoming traffic activities and to raise the alarm if the activities are identified as anomalous. Basically, there are two types of intrusion detection systems: Host-based Intrusion Detection System (HIDS) and Network-based Intrusion Detection System (NIDS). 1. Network intrusion detection System NIDS monitors and analyses external event such as traffic volume, IP address, service port and content of individual packets flowing through a network to look for possible attacks. NIDS consists of the sensor and the console; these two components are placed in front of firewalls or at key network choke point. Normally the console acts as the central management which raises the alert when there is a possible intrusion happened. The sensor which is located on a segment of the network, normally in the demilitarized (DMZ) or at network borders, is used to capture all network traffic and analyze the contents. Below are the advantages and disadvantages of NIDS.
- 5. Advantages: ❖ It can monitor the whole network from one location. ❖ It can identify network traffic patterns and troubleshoot network problems. ❖ It can protect whole network from intrusion. Disadvantages: (a) It generates false alarm easily. (b) Unable to detect certain attacks (false negative). (c) Unable to understand host specific processes or protect from unauthorized physical access. (d) Unable to detect network in different network segments. Example: Snort, Bro
- 6. 2) Host-based intrusion detection system (HIDS) : HIDS analyses internal event such as process identifier, system calls, application logs, file-system modifications (binaries, password files, capability databases, access control lists and other host activities and state. Every single network traffics needs to be analyzed before passing the host. Therefore, HIDS is useful for monitoring potentially dangerous user activities within the network. HIDS is installed locally on host machine such as servers, workstations, notebooks and computers. Therefore HIDS is a very versatile system compared to NIDS. Here are some of the advantages and disadvantages for HIDS. Advantages: 1) Low false positive rate. 2) It has nearly real-time detection and response. 3) It suits well in encrypted environment. 4) It works well in switched network. 5) It monitors all system activities. Disadvantages: 1) HIDS stops working once the host machine is compromised. 2) OS dependent. Example: OSSEC
- 7. ➢ Google and other web-services often directly display or otherwise present data which may lead to some users not visiting the page (where they might discover other information that goes beyond what they originally looked for but it is interest to them) which may or may not be considered an issue ➢ Google and other sites could display a visible button or alike next to that data so that at least if one would be interested in some more info one could easily and quickly get to the appropriate article (as of right now Google seems to do this for the most part), other tools and services that for instance read snippets of articles could have commands built in to somehow open the page on their display or some linked device or ‘tell me more’ for reading the entire page (or its table of contents) ➢ (Maliciously altered) forks Indirect threats
- 8. ❑ Censorship within the page by ill-intentioned administrators or via direct or indirect government control. ❑ Incompetence of the WMF (e.g. causing overspending) ❑ Policies becoming inflexible or not adapting to new realities ❑ Targeted attacks against individual or groups (such as harassment, hacking, social undermining, blackmailing and kompromat and account- takeovers) ❑ Improve anonymous access-methods, a registration group/page for such incidents, building ways to prove one’s identity if it was stolen
- 9. ➢ Targeted manipulation of Page editors and admins : more decentralization, ➢ Quality decline (e.g. by online marketing, paid editing, Internet trolls, widespread use of bad journalistic research in WP:RS, or hard-to-detect vandalism) ➢ Spamming and Internet bots inserting malicious content ➢ Laws and similar measures that damage that page and make it significantly harder to maintain it : lobbying, page – blackout ➢ Debates getting undermined via non- or semi-substantial arguments and sheer number of voters ➢ Linking voters to their arguments and linking these to counterarguments and having internal decision makers pay closer attention to spuch argumentation- chains, identifying canvassing & manipulators
- 10. What is Hacking ? ▪ There are many definitions of hacking. ▪ In this article, we will define hacking as identifying weakness in computer systems and/or networks and exploiting the weaknesses to gain access. ▪ An example of hacking is using by passing the login algorithm to gain access to a system. What is Hacker ? ▪ A Hacker is a person who finds and exploits weakness in computer systems and/or networks to gain access. ▪ Hackers are usually skilled computer programmers with knowledge of computer security.
- 11. TYPES OF HACKERS : Hackers are classified according to the intent of their actions. The following list classifies hackers according to their intent. Ethical Hacker (White hat): A hacker who gains access to systems with a view to fix the identified weaknesses. They may also perform penetration testing and vulnerability assessments. Cracker (Black hat): A hacker who gains unauthorized access to computer systems for personal gain. The intent is usually to steal corporate data, violate privacy rights, transfer funds from bank accounts etc.
- 12. Grey hat: A hacker who is in between ethical and black hat hackers. He/she breaks into computer systems without authority with a view to identify weaknesses and reveal them to the system owner. Script kiddies: A non-skilled person who gains access to computer systems using already made tools.
- 13. Hacktivist : A hacker who use hacking to send social, religious, and political etc. messages. This is usually done by hijacking websitesand leaving the message on the hijacked website. Phreaker : A hacker who identifies and exploits weaknesses in telephones instead of computers.
- 14. 10 sure signs you’ve been hacked 1. Fake antivirus messages 2. Unwanted browser toolbars 3. Redirected Internet searches 4. Frequent random popups 5. Your friends receive fake emails from your email account 6. Your online passwords suddenly change 7. Unexpected software installs 8. Your mouse moves between programs and makes correct selections 9.Your antimalware software, Task Manager, or Registry Editor is disabled and can’t be restarted 10. Your bank account is missing money
- 15. 10 Ways to Protect Yourself from Hackers Online 1.Make your password harder to hack 2. Change your password regularly 3. Clear your browser history 4. Do not use free Wi-Fi 5. Watch what you click 6. Try not to use public computers 7. Use anti-virus protection 8. Do not trust unknown person in the net 9. Use a VPN 10. hide your router name and Use Mac filter
- 16. Best Ways to Protect Yourself from Hackers is Knowledge ! . . . . .THANK YOU . . . . . !