Blockchain (BC), a by-product of Bitcoin cryptocurrency, has gained immense and wide scale popularity for its applicability in various diverse domains - especially in multifaceted non-monetary systems. By adopting cryptographic techniques such as hashing and asymmetric encryption - along with distributed consensus approach, a Blockchain based distributed ledger not only becomes highly secure but also immutable and thus eliminates the need for any third-party intermediators. On the contrary, innumerable IoT (Internet of Things) devices are increasingly being added to the network. This phenomenon poses higher risk in terms of security and privacy. It is thus extremely important to address the security aspects of the growing IoT ecosystem. This paper explores the applicability of BC for ensuring enhanced security and privacy in the IoT ecosystem. Recent research articles and projects or applications were surveyed to assess the implementation of BC for IoT Security and identify associated challenges and propose solutions for BC enabled enhanced security for the IoT ecosystem.

中文翻译：

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区块链和物联网的集成：增强的安全视角

区块链 (BC) 是比特币加密货币的副产品，因其在各种不同领域的适用性——尤其是在多方面的非货币系统中的适用性而获得了巨大而广泛的普及。通过采用散列和非对称加密等加密技术以及分布式共识方法，基于区块链的分布式账本不仅变得高度安全而且不可变，从而消除了对任何第三方中介的需求。相反，越来越多的 IoT（物联网）设备被添加到网络中。这种现象在安全和隐私方面带来了更高的风险。因此，解决不断增长的物联网生态系统的安全问题非常重要。本文探讨了 BC 在确保物联网生态系统中增强安全性和隐私性方面的适用性。