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Trap doors: This is a way of bypassing normal authentication procedure (windows/ operating system user name and password) to access a system. Once a system is compromised (impacted by) by malware, one or more backdoors may be installed for easier future access to the system.
Logic Bombs/ Time Bombs:
Logic Bombs are not programs in their own right but rather camouflaged segments of other programs. They are not considered viruses because they do not replicate. But their objective is to destroy data on the computer once certain conditions have been met. Logic bombs go undetected until launched, and the results can be destructive. For example, some malicious programs are sot off during days such as April Fools Day or Friday the 13th.
function of electrostatic plotter
4. Union City Al has decided to upgrade their tornado warning system. The city leaders have identified six potential locations for erecting a warning siren tower. They want to e
If you have to consider the installation of communications packages, the same questions have to be asked. (a) Does the software and the modem support the necessary transmission
Algorithm : 1. Read the values of principal amount, time and rate of simple interest into the locations labelled as P, T, R. 2. Set the count T to 1 implying the end of a year. 3.
Proposal a) Disabling Interrupts (Hardware Solution) • Every process disables all interrupts just after entering in its critical section and re-enables all interrupts just previous
Consider the one-time pad encryption scheme to encrypt a 1-bit message m, and assume m is chosen with uniform distribution from message space M={0,1}. Let E1 be the event "message
1. In each of the following situations, indicate whether f = O(g), or f = O(g), or both (in which case f = T(g)). Briefly explain why. (a) f(n)=10n5 +8n2,g(n)=20n4 +7n3 +300 (b) f
In this assignment, you need to experiment with computer system measurements. Firstly, pick a platform to study. Any Unix-based system (such as a PC running some version of Linu
Basic computer structure: A computer is an electronic device, which can accept and process data by carrying out a set of stored instructions in sequence. This sequence of math
Time Sharing System: With the use multiprogramming, the batch processing can be quite efficient. However, for many jobs, it is desirable to provide a mode in which the user i
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