With fastest development in communication technologies, Internet of Things (IoT) plays a key role with full maturity and its infancy. Rapidly, it has developed (growth) for large data transmission over the wireless communication. Hence, it is needed to manage system and full fill the market requirement for practical application. Many existing IoT has greatly centralized architectures that have many technical limitations. Examples of these limitations are cyber attacks. Hence, it is needed to find out new techniques for enhancement of data accessing with maintaining security as well as privacy. The solution for this problem is to make the combination of the IoT with block chain which gives a guarantee to sense data integrity. Integration of IoT and block chain resulted in immutable log, comprehensive and easy access. Here, this paper carried out the study of integration of IoT and block chain in relation with different issues, opportunities and application area.

随着通信技术的发展最快，物联网（IoT）在成熟和起步阶段发挥着关键作用。迅速地，它已经发展（成长）为通过无线通信进行大数据传输。因此，需要对系统进行管理，充分满足实际应用的市场需求。许多现有的物联网具有高度集中的架构，存在许多技术限制。这些限制的例子是网络攻击。因此，需要找到新的技术来增强数据访问，同时保持安全性和隐私性。这个问题的解决方案是将物联网与区块链相结合，从而保证感知数据的完整性。物联网和区块链的集成导致日志不可变，全面且易于访问。这里，