【摘要】：多媒體社交網(wǎng)絡(luò)（Multimedia Social Networks，MMSNs）作為一種最方便地在線分享圖像、視頻和音頻等多媒體內(nèi)容的方式出現(xiàn)，它使人與人之間的交流與信息傳播更加方便、快捷，但同時(shí)也帶來(lái)了大量的隱私泄露、版權(quán)糾紛等安全問(wèn)題，這給互聯(lián)網(wǎng)信息的安全傳播帶來(lái)了嚴(yán)重危害。針對(duì)這些安全問(wèn)題，訪問(wèn)控制機(jī)制提供了一種可以在MMSNs中有選擇地分享多媒體內(nèi)容的方法。訪問(wèn)控制機(jī)制決定哪些用戶(hù)能夠訪問(wèn)何種資源，以及如何使用這些資源。然而，現(xiàn)有的訪問(wèn)控制模型，已無(wú)法滿(mǎn)足這一新興互聯(lián)網(wǎng)的應(yīng)用需求。因此，本文針對(duì)多媒體社交網(wǎng)絡(luò)場(chǎng)景下的數(shù)字內(nèi)容（權(quán)利）安全傳播問(wèn)題展開(kāi)研究： 1.提出了一種基于用戶(hù)主要社交關(guān)系屬性如用戶(hù)類(lèi)型、緊密度、內(nèi)容分享深度和信任度等，面向多媒體社交網(wǎng)絡(luò)的訪問(wèn)控制模型，并給出新模型的形式化描述與訪問(wèn)控制規(guī)則。通過(guò)自定義安全規(guī)則及其安全策略沖突消解，有效地解決了數(shù)字媒體訪問(wèn)和分享傳播中的安全問(wèn)題，適用了多媒體數(shù)字版權(quán)保護(hù)應(yīng)用的實(shí)際需求。最后給出了應(yīng)用實(shí)例，從功能性與安全性方面與現(xiàn)存的典型訪問(wèn)控制策略做對(duì)比分析，表明此模型的有效性和先進(jìn)性。 2.基于安全策略效用的形式化定義，在多媒體數(shù)字內(nèi)容訪問(wèn)場(chǎng)景中，將安全策略選擇描述為一個(gè)由內(nèi)容提供者與內(nèi)容請(qǐng)求者之間的二人混合策略博弈，，對(duì)其進(jìn)行了形式化描述與分析。并依據(jù)安全策略組合的效用以及對(duì)各方收益的影響，進(jìn)而獲得博弈的混合策略納什均衡，以此建立和增強(qiáng)雙方信任，最后通過(guò)實(shí)例驗(yàn)證了所提出方法的可行性，從安全性與先進(jìn)性等方面與現(xiàn)存的安全博弈模型進(jìn)行了對(duì)比分析。 最后，基于本文所提出的多媒體社交網(wǎng)絡(luò)訪問(wèn)控制理論模型，設(shè)計(jì)并實(shí)現(xiàn)了一個(gè)功能較為完備的多媒體社交網(wǎng)絡(luò)平臺(tái)原型系統(tǒng)。通過(guò)測(cè)試分析，此系統(tǒng)滿(mǎn)足了一般意義上的社交網(wǎng)絡(luò)平臺(tái)訪問(wèn)控制需求，實(shí)現(xiàn)了用戶(hù)結(jié)交好友、預(yù)覽、上傳、下載和分享多媒體數(shù)字內(nèi)容的功能，用戶(hù)可以設(shè)置數(shù)字內(nèi)容的訪問(wèn)權(quán)限，系統(tǒng)運(yùn)行正常，測(cè)試結(jié)果良好。 本文研究對(duì)實(shí)現(xiàn)多媒體社交網(wǎng)絡(luò)下數(shù)字內(nèi)容的安全可控傳播，具有基礎(chǔ)理論意義，對(duì)促進(jìn)數(shù)字內(nèi)容平臺(tái)和產(chǎn)業(yè)的健康、良性發(fā)展，具有良好的應(yīng)用前景和實(shí)用價(jià)值。
[Abstract]:Multimedia social network (Multimedia Social Networks,MMSNs) has emerged as the most convenient way to share multimedia content such as image, video and audio online. It makes communication and information transmission between people more convenient and quick. But at the same time, it also brings a lot of privacy leakage, copyright disputes and other security issues, which brings serious harm to the safe dissemination of Internet information. To solve these security problems, the access control mechanism provides a method for selectively sharing multimedia content in MMSNs. Access control mechanisms determine which users can access which resources and how to use them. However, the existing access control model can not meet the needs of this new Internet application. Therefore, this paper focuses on the secure spread of digital content (rights) in the context of multimedia social networks: 1. This paper presents an access control model for multimedia social networks based on the user's main social relationship attributes such as user type, tightness, content sharing depth and trust, and gives the formal description and access control rules of the new model. The security problems in digital media access and sharing propagation are effectively solved by resolving the conflicts between custom security rules and their security policies, and the practical requirements of multimedia digital copyright protection applications are applied. Finally, an application example is given and compared with the existing typical access control strategies in terms of functionality and security. The results show that the model is effective and advanced. 2. Based on the formal definition of security policy utility, in the multimedia digital content access scenario, the security policy selection is described as a two-person mixed policy game between the content provider and the content requester. It is described and analyzed formally. According to the utility of the security policy combination and the effect on the income of the parties, the Nash equilibrium of mixed strategy is obtained, so as to establish and enhance the trust between the two sides. Finally, the feasibility of the proposed method is verified by an example. Compared with the existing security game model from the aspects of security and advancement. Finally, based on the theoretical model of multimedia social network access control, a prototype system of multimedia social network platform is designed and implemented. Through test and analysis, the system can meet the requirement of access control of social network platform, and realize the function of making friends, previewing, uploading, downloading and sharing multimedia digital content. Users can set access to digital content, the system runs normally, the test results are good. The research in this paper has the basic theoretical significance to realize the safe and controllable spread of the digital content under the multimedia social network, and has good application prospect and practical value to promote the healthy and healthy development of the digital content platform and industry.
【學(xué)位授予單位】：河南科技大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類(lèi)號(hào)】：TP393.08

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本文編號(hào)：2283017