Brief discussion on different questions for Network Security
Review Questions
List and briefly define categories of passive and active network security attacks.
Explain the difference between an attack surface and an attack tree.
Problems
Consider a desktop publishing system used to produce documents for variousorganizations.
a. Give an example of a type of publication for which confidentiality of the stored datais the most important requirement.
b. Give an example of a type of publication in which data integrity is the most importantrequirement.
c. Give an example in which system availability is the most important requirement.
Consider the following general code for allowing access to a resource:
DWORD dwRet = IsAccessAllowed(…);if (dwRet == ERROR_ACCESS_DENIED) {// Security check failed.// Inform user that access is denied.} else {// Security check OK.}
a. Explain the security flaw in this program.
b. Rewrite the code to avoid the flaw.
Consider a company whose operations are housed in two buildings on the sameproperty: one building is headquarters, the other building contains network and computerservices. The property is physically protected by a fence around the perimeter. The onlyentrance to the property is through a guarded front gate. The local networks are splitbetween the Headquarters’ LAN and the Network Services’ LAN. Internet users connect tothe Web server through a firewall. Dial-up users get access to a particular server on theNetwork Services’ LAN. Develop an attack tree in which the root node representsdisclosure of proprietary secrets. Include physical, social engineering, and technicalattacks. The tree may contain both AND and OR nodes. Develop a tree that has at least15 leaf nodes.
Network Security
Network security is the protection of the underlying networking infrastructure from unauthorized access, misuse, or theft. There are two types of attacks that are related to security namely passive and active attacks. In an active attack, an attacker tries to modify the content of the messages. In a passive attack, an attacker observes the message and copies them. The two types of passive attacks are release of message and traffic analysis – this involves analysis of the traffic and observe the time taken and the size of the message being sent and received. The types of active security attacks are Masquerade and replay – where the data are captured and then retransmit in view of creating an unauthorized effect.
What is genuine?
Logic
We live in a Universe that is unendingly gigantic, upon a planet that plays home the main existing life frames that we are aware of. In the film; The Matrix, our reality is just a negligible PC program, go through our cerebrums while the world decays from inside. In what manner can we ever know, this isn’t transpiring right now? This paper is clearly not approving that we are controlled by PCs, be that as it may, it will endeavor to investigate an inquiry that is once in a while pondered, yet ought to maybe be a progressively regular one; What Is Real? This article will investigate a wide range of perspectives of authenticity, from better places, at various focuses in time, thinking about each perspective, and look to facilitate the peruser’s information in this domain of logic.
Right now, we, as people, have no immediate method for recognizing what is genuine. It is a riddle, unquestionably more mind boggling than any PC or robot we have. What is strikingly odd about this inquiry is that on the off chance that you ask a multi year-old what is genuine, it is plausible that you will get an answer. Unmistakably this answer will be exceptionally fundamental, and chances are that the multi year-old won’t clarify why they picked that answer, yet is it not intriguing that in two minutes, a unimportant tyke can react to an inquiry a few grown-ups, can squander as long as they can remember endeavoring to reply? Many would contend that the tyke just gives that answer, since the person in question is unaware, however is it conceivable that logicians, or any individual who makes an endeavor to answer this inquiry, are unaware, for having disregarded the basic answer of a youth? – once more, this is from a totally un-one-sided perspective, and looks for exclusively to incite thought in the perusers mind.
“In case we’re great, we go to a paradise or some likeness thereof.” An answer numerous individuals around the globe would give when asked what happens when we pass away. Is that conceivable? There is a hypothesis that when we bite the dust, we lose 21 grams, and that these 21 grams speaks to our spirit, either heading up, or down. Is this a real probability, that as we pass on, a piece of us lives on? Is it conceivable anybody will ever know without a doubt? Another hypothesis on the great beyond; is that when we bite the dust, it’s equivalent to before we were conceived. This unverifiable nothingness, of a dim or light clear screen. What’s more, as we hold up in this dull/daintiness, we are simply sitting in line to be reawakened. This hypothesis prompts the contention of what is “nothing”? Is “not all that much?” There is no unmistakable meaning of “nothing” in the word reference, just ambiguous endeavors, for example, “a non-existent thing,” or “not the slightest bit; to no degree.”
The possibility of nothing being outlandish is very entrancing, as it is preposterous to expect to consider nothing, driving us further to trust that something, must be genuine, regardless of whether they are negligible pictures, they are still “genuine pictures.” These genuine pictures are what we observer in regular daily existence, in spite of the fact that they contrast from individual to individual, we realize that we are seeing something genuine, in light of the fact that we realize that we can’t see nothing.
We live in a capricious world. Nobody can tell without a doubt what’s sticking around the bend, or what will happen tomorrow. However a few people have faith in something many refer to as fate: The apparently unavoidable progression of events¹. Predetermination conflicts with everything legitimate. It is a reality, common realized that nothing is provable by methods for the innovation, science, math or investigation, which we have in our day and age. Promoting our inquiry, to something more along the lines of; “How would we know what we believe is genuine, on the off chance that we have no chance to get of really demonstrating it?” So is it conceivable that predetermination does truly exist, and that we may all pursue a rundown of occasions that have just been thoroughly considered? Maybe the determinists are correct?
As people, the greater part of us are honored with five detects; contact, taste, sight, smell, and hearing. These intense faculties differ from individual to individual. What may show up as an orange to one may show up as a banana to the following. One’s procured preference for sushi may be viewed as appalling to another. There is a colloquialism that says “one keeps an eye on waste is another’s fortune.” This idiom speaks to how detects differ from being to being, as well as how point of view does also. It is doubtful that viewpoint all relies upon things, for example, foundation, convictions, and maybe above all, riches, yet these assessments are exclusively subjective depending on each person’s preferences. It is solidly trusted that point of view is impacted by how one see’s a picture, question, or individual, basically, and also by riches and so on.
These shifting points of view can be caught in full movement at Stanstead College, where there is a conflict of societies. There are Mexicans who lean toward their treat hot and hot, to nearly any other person who scowls at first taste, and requests something sweet. This does not just remain constant for sweet, it very well may be found in some other point of view of life; style, likes, sports (beside soccer as it is known as the worldwide dialect), and enthusiasm for the contrary sex. Where one kid may discover a young lady in his class to be the following best thing since cut bread, the young fellow alongside him may totally oppose this idea. Another precedent can be found in the music business, where one kid may discover Mozart abominable, and be frantically infatuated with his most loved overwhelming metal band. The person in the room beside him that gets frantic at this boisterous, evil clamor as he may allude to it, may extravagant traditional music and think it is stunning. Every one of these reasons may persuade that we are not all seeing similar pictures, or hearing similar sounds, that preferences and preferences are more than gained, that maybe it’s the manner in which it gets through our ears or mouth that varies.
These models all lead to the following inquiry; if individuals’ viewpoints and tastes change so intensely, how would we know which one is correct, or genuine? Is their a wrong side of the extension? Is there an approach to decide this? No. Because of the constraints of reason and sensible reasoning, until further notice the sum total of what we have is our obstinate speculations. These feelings have been referred to get us stuck in an unfortunate situation as a race. Since the principal religious wars, individuals have been battling about convictions, domain, and who the more grounded is. Life would nearly be a lot less demanding if a correct answer was definable.
Apply from: From Socrates to Sartre: The Philosophic Quest: p. 207 Hegel’s Metaphysics: Absolute Idealism
“Reality as totality of applied truth” – Idea that add up to the truth is an outright personality, or the brain of god, which is an incorporated and organized wellspring of certainties.
“Reality as outright personality” – the truth is supreme reason which uncovers itself through human encounters in all parts of life.
“The genuine is the normal and the sane is the genuine”
“The truth is understandable by its coherent, sound structures” – Hegel is exceptionally against the rule that the truth is mysterious, for he trusts it is available for each human to accomplish through reason.
Hegel, much like Plato, is a relativist, and a solid one at that. “Hegel is as certain a pragmatist as Plato had been.” (From Socrates to Sartre, p. 209) He is a firm adherent that reality, and what is genuine, is definable through objective idea, something that is available in all people. He feels that “what is genuine?” all relies upon the individual, and their own encounters.
Apply from: Philosophy, a Text with Readings – p. 178
“Give us a chance to settle ourselves , and work and wedge our feet descending through the mud and slush of supposition, and partiality and custom, and hallucination, and appearance, that alluvion which covers the spreads the globe… till we com to a hard base of rocks in a place which we call reality.” – James Thomson.
Thomson feels that for people to have a strong feeling of the real world, besides, what is genuine, they should initially put behind them their disparities in conclusion, convention, appearance and so forth. This is observed to be a decent point, as it bodes well. How might we anticipate that a world should settle on things, for example, reality, when we can’t settle on littler things, for example, oil costs? As a race, our disposition towards one another must change, and as a people, we should consider everybody’s point of view in an aware way. Globalization, as much as it is disapproved of by a few, is accepted to be a conceivable answer. Globalization is enabling us to wind up progressively joined as a world, making it less demanding to contact each other. “first period of globalisation(discovery of the new universes in 1490’s) changed the extent of the world from substantial to medium, second phase(industrial unrests) transformed it from medium to little, the third stage, which is occurring now, transformed it from little, to small.” – ***politics paper
The Materialist View
(“realism: the magical position that the truth is at last made out of matter”– definition from Philosophy, a Text with Readings)
Eastern-Eastern realism goes back to around 600 B.C.E, was a guideline held by the Charvaka logicians of India. They trusted that the main type of thinking was sense observation. They felt that different wellsprings of learning, for example, inductive, or deductive thinking were invalid. They trusted that the main dependable wellspring of information is the thing that we can see, hear, contact, smell, or taste with our faculties. Alongside this conviction, they contended that on the off chance that we can’t know something, it isn’t right to say it exists. They didn’t have faith in spirits, nor did they put stock in an existence in the wake of death, since it isn’t something we can see with our faculties. “Human life starts in this world, and closures in this world, so individuals should attempt to get as a significant part of the substantial joys of this life as they can.” – Charvakaian Belief
Western-Western realism can be followed the distance back to 460 B.C.E. Much like the Charvakian savants, the early Western scholars trusted that reality could be ex