Passive and active attacks in network security pdf

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passive and active attacks in network security pdf

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The major difference between active and passive attacks is that in active attacks the attacker intercepts the connection and modifies the information. Whereas, in a passive attack, the attacker intercepts the transit information with the intention of reading and analyzing the information not for altering it. There are various types of threats, attacks and vulnerabilities present to corrupt and breach the system security. Security attacks are the computer attacks that compromise the security of the system. Basis for comparison Active Attack Passive Attack Basic Active attack tries to change the system resources or affect their operation.

Network security

Security attacks are typically computer attacks that jeopardize the security of the system. Want to gain more knowledge about these attacks? Keep reading the article. Active attacks are attacks in which the hacker attempts to change or transform the content of messages or information.

These attacks are a threat to the integrity and availability of the system. Due to these attacks, systems get damaged, and information can be altered. The prevention of these attacks is difficult due to their high range of physical and software vulnerabilities. The damage that is done with these attacks can be very harmful to the system and its resources.

The good thing about this type of attack is that the victim is notified about the attack. So, instead of prevention, the paramount importance is laid on detecting the attack and restoration of the system from the attack. An active attack typically requires more effort and generally have more difficult implication.

Some protective measures that can be taken against this kind of attack are:. Passive attacks are the ones in which the attacker observes all the messages and copy the content of messages or information. They focus on monitoring all the transmission and gaining the data. The attacker does not try to change any data or information he gathered.

Unlike the Active attacks, these are difficult to detect as it does not involve alteration in data or information. Although it can be prevented using some encryption techniques. In this way, at any time of transmission, the message is in indecipherable form, so that hacker could not understand it.

So this is the reason why more emphasis is given to prevention than detection. There are some protective measures that you can take to prevent these attacks. The main differences between them are made based on how they are done and how much damage they do to the system and its resources. The active attacks are divided into three types, which are listed down below:. Cybersecurity is a big part of our lives today.

It is crucial to protect our devices from these malicious activities of attackers. So, have you made up your mind to make a career in Cyber Security? It is the first program in offensive technologies in India and allows learners to practice in a real-time simulated ecosystem, that will give them an edge in this competitive world. Ajay Ohri 5 Jan What is Active attack? What is Passive attack? Difference between them Examples Types 1 What is Active attack? Some protective measures that can be taken against this kind of attack are: Making use of one time passwords helps in authenticating the transactions between two parties.

A random session key can be generated, which will be valid for only one transaction. This will help in preventing the attacker from retransmitting the original information after the actual session ends. Avoid posting sensitive and personal information online as attackers can use it to hack your network. Use the encryption method for your messages and make them unreadable for any unintended intruder.

The active attack causes damage to the integrity and availability of the system, but passive attacks cause damage to data confidentiality. In active attacks, attention is given to detection, while in the other one, attention is given to prevention. The resources can be changed in active attacks, but passive attacks have no impact on the resources. The active attack influences the system services, but the information or data is acquired in passive attacks.

Inactive attacks, information is gathered through passive attacks to attack the system, while passive attacks are achieved by collecting confidential information such as private chats and passwords. Active attacks are challenging to be prohibited, but passive attacks are easy to prevent. Active attacks The attacker is inserting his data into the original data stream. Man-in-the-middle attack where the attacker sits between both parties communicating and replacing their messages with his message.

In other words, both parties believe that they are talking to each other, but in reality, they are talking to the attacker. The active attacks are divided into three types, which are listed down below: Interruption : These attacks are also known as masquerade attacks, where an unlawful attacker tries to show themselves as another identity. Modification : These attacks can be done in two ways, replay attack and alteration. Replay attacks are the ones in which a sequence of events are captured and resent by the attacker.

Simultaneously, alteration attacks are the ones in which some changes are done in original messages. Fabrication : These attacks cause Denial of service attacks in which the attackers try to prevent legal users from preventing access to some services. In other words, the attacker gains access to the activities, and the permitted users are prohibited from using the services. The hacker analyses the traffic and observes the pattern to decrypt the message.

These types of attacks are called traffic analysis. Conclusion Cybersecurity is a big part of our lives today. We are working on connecting you to one of our counsellors. Call me. Talk to us on or fill in these details to request a callback. Are you ready to build your own career? Request callback. Call Us. Sign up using any of the below options. Sign in with Facebook. Sign in with Google. Sign in with LinkedIn.

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Difference between Active Attack and Passive Attack

Active attacks: An Active attack attempts to alter system resources or effect their operations. Active attack involve some modification of the data stream or creation of false statement. Types of active attacks are as following:. Passive attacks: A Passive attack attempts to learn or make use of information from the system but does not affect system resources. Passive Attacks are in the nature of eavesdropping on or monitoring of transmission.


Integrity and availability is compromised by active attacks, while the Passive attacks are silent in nature and do not harm the network traffic or normal network​.


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Security attacks are typically computer attacks that jeopardize the security of the system. Want to gain more knowledge about these attacks? Keep reading the article. Active attacks are attacks in which the hacker attempts to change or transform the content of messages or information.

In computers and computer networks an attack is any attempt to expose, alter, disable, destroy, steal or gain information through unauthorized access to or make unauthorized use of an asset. An attacker is a person or process that attempts to access data, functions or other restricted areas of the system without authorization, potentially with malicious intent. A cyberattack can be employed by sovereign states , individuals, groups, society or organizations, and it may originate from an anonymous source. A product that facilitates a cyberattack is sometimes called a cyberweapon.

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Difference Between Active and Passive Attacks

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Лифт, соединяющий шифровалку с основным зданием, получал питание из главного комплекса, и оно действовало, несмотря на отключение питания шифровалки. Стратмору, разумеется, это было хорошо известно, но даже когда Сьюзан порывалась уйти через главный выход, он не обмолвился об этом ни единым словом. Он не мог пока ее отпустить - время еще не пришло. И размышлял о том, что должен ей сказать, чтобы убедить остаться. Сьюзан кинулась мимо Стратмора к задней стене и принялась отчаянно нажимать на клавиши. - Пожалуйста, - взмолилась .

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Стратмор находится на верхней площадке, у меня за спиной. Отчаянным движением он развернул Сьюзан так, чтобы она оказалась выше его, и начал спускаться. Достигнув нижней ступеньки, он вгляделся в лестничную площадку наверху и крикнул: - Назад, коммандер. Назад, или я сломаю… Рукоятка револьвера, разрезая воздух, с силой опустилась ему на затылок. Сьюзан высвободилась из рук обмякшего Хейла, не понимая, что произошло. Стратмор подхватил ее и слегка обнял, пытаясь успокоить.

В отношении шифровалки в АНБ сложилась своеобразная философия. Нет смысла вбухивать миллиарды долларов в дешифровальный компьютер и одновременно экономить на тех, кто работает на этой превосходной технике. Сьюзан скинула туфли на низких каблуках от Сальваторе Феррагамо и блаженно погрузила обтянутые чулками ноги в густой шерстяной ковер. Высокооплачиваемые государственные служащие старались избегать демонстрации личного благосостояния. Для Сьюзан это не составляло проблемы: она была безмерно счастлива в своей скромной двухкомнатной квартире, водила вольво и довольствовалась весьма консервативным гардеробом.

Это я гарантирую. Как только найдется недостающая копия ключа, Цифровая крепость - ваша. - Но с ключа могут снять копию. - Каждый, кто к нему прикоснется, будет уничтожен. Повисла тишина. Наконец Нуматака спросил: - Где ключ. - Вам нужно знать только одно: он будет найден.

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