Social Networking Security

                                                         Social Networking Security
Access control service to prevent unauthorized use of resources can be through the OSI. These may be OSI or as OSI resources must be through the OSI agreement. This protection services can be applied to various types of access to resources (for example, the use of a communication resources, reading, writing, or delete the information resources; to execute processing resources) or to all access to resources.
Data confidential service to provide protection from unauthorized disclosure of data, such as connection to keep secret, selective confidential and traffic flow field of confidentiality.
Data integrity service counter, may need to actively threat one of these forms such as connection complete recovery, connected completeness did not resume, selective field and join the complete and free of any link integrity and selective field and join the integrity

Security of online social environment organization forces.
But why do we call social network may threaten business? As you can see, with the convenience of the social/media, internal staff may easily leak important information (such as: intellectual property rights, key business information organization) to the web. Some online criminals can visit malicious injection/sensitive data (such as infiltration. Cookies cheat), connected to the goal of social platform victims. In the first half of 2009, 19% of the Internet attacks target social networking sites. This represents a dramatic growth in the past few years, a new study shows that breach of security company,
Network attackers are usually dangerous, because most of them are effective technical knowledge, that they produce false information, attractive, but it seems from a trusted party, such as your friends and attract the unsuspecting users click, guide their web site or phishing site employing malicious code intentions/software for sensitive personal information.

Data leakage sometimes involves a breach of confidentiality of attorney. A simple example, it is not common for medical school students through the exposure of the patient sensitive information of the social networking platform, share their "practice experience".
Although social platform safety risk increase as malicious software attacks and data leakage, we cannot deny that strength and wonderful user experience, social networking sites to us. Maybe we can't avoid these problems, but in my opinion, I believe that there are many ways to reduce the loss. And then I want to some of my Suggestions country, most people are very simple and clear, please don't ignore them. First of all, be prudent and careful put out your sensitive information on your personal web pages. Second, the huge number of social media advertising, remember to think about it, never believe everything online. Third, control, one can see your profile and personal information. For example, you may decide to your phone number can be all of your direct friends, both friends and friends of friends, no one person or a customized list.

Communicate with people of social network platform is a good thing, we will never make some bad guys to destroy it. Note that these security problems, trying to avoid these risks and make life more pure and their contribution.

Introduction-SNA

In my point of view, what is social network analysis can have two kinds of methods to describe: one of them is the relationship between different entities and flow person, a group, organization, computer, web site.
Another method is applied to the analysis of social network, refers to the social structure made up of individuals, which is connected in one or more specific types.
Social network analysis perspective, social network nodes and the relationship between the theory of. Node is individual actors in the network and the link is the relationship between the actors. The simplest form is a social network is a map designated relationship, such as friendship, between the nodes in a stage of study. Node, so the connection is a person's social interaction.
This example network is a 2-clique and 4-plex; {a, B and D} and {a, C, D} form factions. In this case, to all the other all the node, so they have the same effect within 4 slices. David is cut-point if delete, will make the network disconnected, and despair tie bridge, if delete, also can make the network disconnect. This example and degree and degree as a representative of the center of each node is as follows:

	Alice	Bob	Carol	David	Eva
Alice	-	1	1	1	0
Bob	1	-	0	1	0
Carol	1	0	-	1	0
David	1	1	1	-	1
Eva	0	0	0	1	-

So the density of this network is 0.6; group level degree centrality is 0.5; and group degree centralization is 2/3. We can get the geodesic distances as follow matrix.

	Alice	Bob	Carol	David	Eva
Alice	-	1	1	1	2
Bob	1	-	2	1	2
Carol	1	2	-	1	2
David	1	1	1	-	1
Eva	2	2	2	1	-

Then we could calculate the degree, betweenness centrality, closeness centrality, degree centrality, degree prestige and proximity prestige of each member and group betweenness centralization, group closeness centralization and group degree centralization as follow. The group level degree centrality is 0.5.

  Backing to our question, we found that the degree centrality is the best to fit the question, so using this to compute, we have the following results:

Alice	3
Bob	2
Carol	2
David	4
Eva	1

 Matrix can show that David is the most prestigious, influence he of each attribute to maximize the value of, all of his property values greater than group concentrated attributes.

David degree high, value to send and receive many information to others a greater degree of influence and greater popularity and reputation in the network. Eva low value in-degree show that her a few sending and receiving text messages from the rest of the students. So she is often society and social isolation from the rest of the class.
In this network, d more adapted to prefer to have more structure and more consensually agree the structure; And E more innovation like operation using less structure and care for her in the structure of achieving consensus purposes. And full of Internet connection is A and D appear.
My work is finished, I found that, although different results, this paper, from the analysis of the same social network and the different methods, and they represent the same things in different ways. Different analysis methods just describe the role of the different nature, there are ways to achieve the same effect degree and degree of credibility, like to play closeness and close to the center reputation in this case.

Social network marketing value geometry

Without a doubt, social network brings to our life disruptive change, affecting our friends, family and to the current social events in the way. But social network for the influence of the business what is like? Facebook marketing executive director Penn nereo Rocco said the situation is not very optimistic.Payne think, social network for business is not always to be effective way. Most of the attempted to use the social network realization commercial purpose of users have had some degree of contempt and abuse. They were called "garbage information maker" (Spammers), on social networking sites were not "add for good friend", "shield", is pulled black, or was publicly mocking. So, in that case, the social network marketing to the investment of how many returns? This is now the biggest social business problems. Payne said, this situation exists for several years, and it is difficult to track. Most people still tend to put the social network as a private affairs, and non-commercial use. But, the market marketing personnel are still in use this way on marketing, and try to make the boss, the staff and the board of directors includes, all believe this is effective. In social web site for, the return on investment is a subject of debate.
A from MDG Advertising of the Advertising firm chart "social network investment rate of return" according to display, social network marketing return on investment return-on-investment (ROI) is not as obvious as people think. As the chart shows, the social network Facebook brings the most obvious ROI, is the most valuable social marketing platform, but significant increase of only 14.3%, Twitter and LinkedIn only 11.4% and 10.9% respectively. And, more companies are planning to increase marketing investment on YouTube.

In addition, the social network marketing is not a suitable for and uniform metric. Click on the quantity is not the only. In the research of the chief marketing officer accepted the (CMO), 96% of sales target and begin to surmount web standard to identify its value. What's your goal? Is short-term sales, or sales promotion to supplement the competition? Is to strengthen the contact with existing customers, or to increase product search volume?

And, according to research firm forrest (Forrester) information displays that judge the value of social media marketing to consider the four factors: one is the cost of the increase or decrease, and the second is the brand effect is improved, and three is risk management, the company is ready to cope with may cause of brand of the negative impact, four is digital assets have increased.

Social network analysis

                                                                       我所认识的社交网络
         我认识最早的社交网络是从facebook开始，我认为facebook就是社交网络的代表和完全的体现，你可以在这个网络里，结交朋友，聊天，娱乐，分享信息，还有一个很重要的认识是社交网络是一种信息传播渠道，这种渠道的负载量和传播速度是非常惊人的，一个成功的社交网路可以很快的吸引大量的用户参与，但是我原来从来没有想过人们为什么会喜欢使用社交网络，社交网络为什么可以发展成互联网上主要得一种网站形式，通过学习了“社交网络”这门课程，我认识到在facebook取得成功和它的华丽数据的背面是更为重要的“社交网络”里的心理学和社会学知识。
        我看过“Social network”这部电影，讲述的是facebook的诞生到成功，我认为社交网络是一种网络形式，facebook这样的网站是一种企业形式，看完这部电影，我开始思考为什么facebook能在极短的时间里取得这样巨大的成功，“the face book”（facebook前身）的出现非常平淡，没有华丽的宣传，甚至受到外界因素的打压，但是访问它的人却越来越多，这里面没有网络营销，没有宣传广告，那它成功的因素是什么呢？既然在网站本身找不到那我们就来看看客户这边吧。
        人们为什么喜欢上了社交网络，因为在这里可以展示不一样的自己，可以表现出在现实生活中不一样的一面。人们不仅可以互相交流，还可以做一些现实社会里他们不能做的事情，前提是不违反法律。这就是为什么社交网络能成功，因为它包含了用户心里学，社会学等各种微妙的客观存在的现象，一件事物的成功，除了本身的独特的特点之外也包括对社会的影响，对人的影响。

Social network analysis

I realized that the first knowledge of social network, which starts from using of face book . I always deem that face book is the representative of social work and readily expressed through the features of social network. As we all know, people is able to make friends easily through face book, chat, entertainment and share information. I also learned that social network is a convenient means to convey information. We can see the capacity and the transmission speed of social network is very impressive and encouraging.  A large number of users will be attracted involved by a successful social network. But I had never thought why so many people like using social work in their life. What is the main reason for social work is developing a major form of the internetwork. The course of social work, I have learned this semester, has taught me a lot of useful knowledge of social work. However not only for this, I also realized that the social work it’s astonishing success to several main business and technology strategies, which it has parapsychology section and sociology knowledge we needed to learn.

I've seen the film named "Social network" that is about the birth of face book and the process of achieving  success, I think that social networking is the one of the most important form of a entire network, facebook is in the form of a business, watching the film, I have been thinking about why facebook could achieve such great success in a very short time, the face book "(facebook predecessor) appeared in the low key venue, there was no any high-profile publicity, and even there are all kind of obstacle factors , but nowadays the more and more users who would like to use face book actively . There is no network marketing, advertising, and most of people who want to know how facebook wins in entire networking? Maybe we need to consider this question from another angel which is the customer side.

Why do people like on the social network where you can show yourself from different aspects that might not be the same in your real life. People can not only communicate with each other, you can also do some social reality they cannot do, and the premise is not against the law. This is why social networks can be successful, because it contains the objective existence of the phenomenon of user psychology, sociology, and other subtle, the successful in one thing, except for their own unique characteristics, definitely include whether its development will have a great effect on our society and human society.