Security is very important to keep the threats away from the system. Mainly security covers integrity, confidentiality, and availability of the system.
Security preserves the system from hacking and viruses, worms and malware. If a user program is altered to do made malicious tasks, then it is known as Program Threats.
Such two program threats are mentioned as below:
- Trojan Horse :
A standalone malicious program which may give full control of infected PC to another PC is called Trojan horse. It may make copies of them, harm the host computer systems, or steal information.
The Trojan horse will actually do damage once installed or run on your computer but at first glance will appear to be useful software. Trojans are designed as they can cause serious damage by deleting files and destroying information on your system.
Trojans allow confidential or personal information to be compromised by system creating a backdoor on your computer that gives unauthorized users access to your system. Unlike Trojans do not self replicate reproduce by infecting other files nor do they self-replicate. Means Trojan horse viruses differ from other computer viruses and do not spread themselves.
Most popular Trojan horses are Beast, Zeus, The Blackhole Exploit Kit, Flashback Trojan, Netbus, Subseven, Y3K Remote Administration Tool, Back Orifice.
- Trap Door :
A trap door is kind of a secret entry point into a program that allows anyone gain access to any system without going through the usual security access procedures. Other definition of trap door is it is a method of bypassing normal authentication methods. Therefore it is also known as back door.
Programmers use Trap door legally to debug and test programs. Trap doors turns to threats when any dishonest programmers to gain illegal access. Program development and software update activities should be first focus of security measures. Operating system that controls the trap doors is difficult to implement.
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