Exponential growth of information in the cyberspace alongside rapid advancements in its related technologies has created a new mode of competition between societies to gain information dominance in this critical and invaluable space. It has thus become quite critical to all stakeholders to play a leading and dominant role in generation of information and monitoring of voluminous information uploaded to this space. The dominant role of a stakeholder in cyberspace provides him with new opportunities and builds up his capacity for passive defense in the political, ethical, scientific, educational and recreational fields. However, to gain dominance in the monitoring of vast amount of information in cyberspace requires new techniques and approaches for online monitoring quite different from traditional ones. Concerned with the latter case, we limit our focus in this paper on blogs as an important part of the cyberspace social media and present a new technique for online detection of changes in blogs. We show that our technique works favorably compared to techniques that require cooperation and synchronization between information providers. This is achieved by providing a new architecture and restricting the search for changes in high volumes of blogs only to changes in the RSS of each blog.