information system security notes

2017-2018-1 20155222 "Fundamentals of Information Security system Design" 10th week IPC mechanism under Linux The communication mechanism between multiple processes under Linux is called IPC (inter-process Communication), which is a way of communicating with each other across multiple processes. There are several ways of interprocess communication under

). Determine the current status of the project progress; Exert influence on the factors causing the change of schedule; To ascertain whether progress has changed; Manage the actual changes as they occur. II. Security management of information systems1 and technologies to achieve the confidentiality of information; Network

20145216 Shi Yao "Information Security system Design Fundamentals" Seventh week Study summary teaching Contents summary Sixth chapter memory hierarchyA memory system is a hierarchical structure of storage devices with different capacities, costs, and access times.CPU registers, cache memory, primary storage, disk.The f

Perform the default action Ignore signal Capture signal: Perform signal processing function, switch to user state. Snapping: Signal functionsIgnore signal: sig_ignDefault action: SIG_DFL(3) Multi-signal processingProcessing method:1. Recursive, call the same handler function2. Ignoring a second signal3. Block the second signal until the first one is processedSixth section non-local jumpThe C language, the user-level exception control flow form, is provided through the setj

started using this mode, the activity disappears and is not persisted in the task stack when the activity initiates other activity. For example a B, starting c,c in this mode in B and then starting D, the current task stack becomes a B d.4. Empty the task stack(1) clearTaskOnLaunch : Each time the activity is returned, all activity on top of the activity is cleared. This property allows the task to have only one activity at a time when it is initialized.(2) finishOnTaskLaunch : Cleartaskonlaunc

misses/number of references Hit Ratio = 1-No hit Hit time No hit penalty: Because of the extra time required to miss the 2. Specific impact: Cache Size: Hit ratio +, hit Time + Block Size: Spatial locality +, hit ratio +, number of cache rows-, time locality-, no hit penalty + Degree of coupling: E value big, jitter-, Price +, hit Time +, no hit penalty +, control logic + "compromise for not hit penalty low, low degree of coupling, not hit penalty high, use hig

of my reading notes, life impressions, current affairs discussion and even open the brain hole, this kind of thing really suitable to send to the blog? After all, send to let the teacher see the things students are also can see, feel what the heart of what things let others see feel good shame ah.What do you think the teacher of this class should continue to do? The teacher has always been a good teacher, which I believe. So I should go on, except th

any timing or control. This is a reasonable assumption for smaller memory (such as a register file), and for larger circuits, a special clock circuit can be used to simulate this effect. Since instruction memory is used only for reading instructions, we can consider this unit as a combinatorial logic.4 Implementation of the SEQ phaseThe register file has four ports, it supports simultaneous two reads (on ports A and B) and two writes (on Ports E and M). Each port has an address connection and a

course, I started the attitude is not good, not qualified to give advice to the teacher, even if the mention is also some perfunctory words or make up the words is better not to mention. I can only say that blogging is a good thing though trouble. Other things that you think are important I think the important thing, this semester this textbook election is good, I also study this series of other books, "Neural Network and machine learning", I think for me this does not like readin

-feeling bad, read a lot of confusion, code execution is also less. This week's code package gives me a good chance to practice understanding! So I just took the code out of the video in handy. The feeling learned a lot of content. In particular, the function of fork such functions are in the execution of the code to feel its principle. It was really touching when I finished it!!!Because there is also a recent project of this course, the internet also searched a lot of communication between the

"/>In charge of the city's history, it is like a database vulnerability scanning system that discovers database instability factors.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M02/6E/B6/wKiom1WDjoOTvMpmAAMIu-0bVaM068.jpg "title=" The Ming Palace Museum jpg "alt=" wkiom1wdjootvmpmaamiu-0bvam068.jpg "/>Protecting the city's moat and walls is like protecting the database's firewall.650) this.width=650; "src=" Http://s3.51cto.com/wyfs02/M00/6E

the teacher step, even in advance preview.More hands-on, more thinking. In particular, more hands-on, add code, you can allow yourself to understand the code more deeply.Rest must be regular, otherwise you can focus attention every time to learn, otherwise you will learn the time is especially more than the amount of knowledge, is not learning to go in the meaning (deep experience)Questionnaire SurveyHow long do you spend on average per week in this course?20 hoursDo you improve your weekly lea

Summary of the eighth cycle of the Design foundation of information security system"Learning Time: 12 Hours""Learning content: chapter1--chapter7 content focus; Analysis of questions and test errors; Review of the difficulties in the experimental process"First, the content of the textbook Chapter focus (i) Chapter 1. The info