| Class XII |
Computer Science |
Computer Science |
12 |
t ha p e r C 12 Security Aspects “Treatyourpasswordlikeyour toothbrush.Don'tletanybodyelseuseit, andgetanewoneeverysixmonths.” — CliffordStoll In t... |
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| Class XII |
Computer Science |
Computer Science |
12 |
term computer virus was coined by Fred Cohen in 1985 and has been borrowed from biological science with almost similar meaning and behavior, the on... |
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| Class XII |
Computer Science |
Computer Science |
12 |
12.3.1 Methods of Malware Identification used by Antivirus (A) Signature-based detection In this method, an antivirus works with the help of a sign... |
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| Class XII |
Computer Science |
Computer Science |
12 |
Code Red, Nimda, Morris Worm, etc. 12.2.3 Ransomware It is a type of malware that targets user data. It either blocks the user from accessing their... |
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| Class XII |
Computer Science |
Computer Science |
12 |
that is created to generate revenue for its developer. An adware displays online advertisements using pop-ups, web pages, or installation screens. ... |
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| Class XII |
Computer Science |
Computer Science |
12 |
randomises the key layout every time it is used (Figure 12.4), thereby making it very difficult for a keylogger software to know or record the key(... |
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| Class XII |
Computer Science |
Computer Science |
12 |
Malware exists and continues to evolve, and so is the mechanism to combat them. As the saying goes that prevention is better than cure, we list som... |
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| Class XII |
Computer Science |
Computer Science |
12 |
(E) Real-time protection Some malware remains dormant or gets activated after some time. Such malware needs to be checked on a real-time basis. In ... |
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| Class XII |
Computer Science |
Computer Science |
12 |
leaving SeCuritaSpeCtS 231 Reprint 2026-27 it vulnerable to attacks from hackers. Hence, HTTP is sufficient for websites with public information sh... |
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| Class XII |
Computer Science |
Computer Science |
12 |
computer, it is called a host-based firewall. 12.7 C ookies Assume students in a class are to finish The term "cookie" was derived from the term "m... |
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| Class XII |
Computer Science |
Computer Science |
12 |
for cookies. Address, Contact, D.O.B, etc. automatically fills up Also, try to locate some cookie files on while filling an online form. This auto-... |
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| Class XII |
Computer Science |
Computer Science |
12 |
check and fix their systems for potential security threats and loopholes. Technically, white hats work against black hats. 12.8.2 Black Hats: Crack... |
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| Class XII |
Computer Science |
Computer Science |
12 |
A variant of DoS, known as Distributed Denial of Service (DDoS) is an attack, where the flooded requests come from compromised computer (Zombies) s... |
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| Class XII |
Computer Science |
Computer Science |
12 |
huge load leaves the network detection system incapable of monitoring the packets adequately. The hacker takes advantage of this congested and chao... |
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| Class XII |
Computer Science |
Computer Science |
12 |
a network. Also, the targets 110 111 00 00 11 00 11 00 0 0 0 0 0 1 11 10 11 11 10 11 010 011 0101 1000 Figure 12.6: Eavesdropping are usually the p... |
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| Class XII |
Computer Science |
Computer Science |
12 |
a legitimate software and once it tricks a user into installing it, it acts pretty much like a virus or a worm. • Spyware records and sends the col... |
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| Class XII |
Computer Science |
Computer Science |
12 |
the user. • Hackers/Crackers find loopholes and vulnerabilities in computer systems or computer networks and gain access to unauthorised informatio... |
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| Class XII |
Computer Science |
Computer Science |
12 |
explain different modes of malware distribution. 10. List some common signs of malware infection. 11. List some preventive measures against malware... |
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| Class XII |
Computer Science |
Computer Science |
13 |
a p t er C h Project Based Learning “Anideathatisdevelopedandputinto actionismoreimportantthanideathat existsonlyasanidea.” — GautamBuddha In this ... |
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| Class XII |
Computer Science |
Computer Science |
13 |
to the desired outcome. Different steps involved in project based learning (Figure 13.1) are : (1) Identification of a project: The project idea ma... |
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| Class XII |
Computer Science |
Computer Science |
13 |
and follow steps that are agreed upon. (C) Share with Others Ideas, images and tools need to be shared with each other in order to perform a job. S... |
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| Class XII |
Computer Science |
Computer Science |
13 |
Specifications Make a group of students to undertake a project on automating the order processing of the restaurant ‘Stay Healthy’. The owner of th... |
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| Class XII |
Computer Science |
Computer Science |
13 |
If the cell does not contain a bomb, then the cell reveals a number giving a clue about the number of bombs hidden in adjacent cells. Before you st... |
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| Class XII |
Computer Science |
Computer Science |
13 |
to insert a digit in the list of cells. Note: Do take care of the situation when digits displayed in a list of cells do not add up to 10. projeCtB ... |
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| Class XII |
Computer Science |
Computer Science |
2 |
t ha p e r C File Handling in Python Therearemanywaysoftryingtounderstand programs.Peopleoftenrelytoomuchononeway,which iscalled"debugging"andconsi... |
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