Digital forensic in Internet-of-Thing (IoT) paradigm is critical due to its heterogeneity and lack of transparency of evidence processing. Moreover, cross-border legalization makes a hindrance in such process pertaining to the cloud forensic issues. This urges a forensic framework for IoT which provides distributed computing, decentralization, and transparency of forensic investigation of digital evidences in cross-border perspectives. To this end, we propose a framework for IoT forensics that addresses the above mentioned issues. The proposed solution called Internet-of-Forensics (IoF) considers a blockchain tailored IoT framework for digital forensics. It provides a transparent view of the investigation process that involves all the stakeholders (e.g., heterogeneous devices, and cloud service providers) in a single framework. It uses blockchain-based case chain to deal with the investigation process including chain-of-custody and evidence chain. Consensus is used for consortium to solve the problems of cross-border legalization. This is also beneficial for a transparent and ease of forensic reference. The programmable lattice-based cryptographic primitives produce reduced complexities. It shows benefits for power-aware devices and puts an add-on to the novelty of the presented idea. IoF is generic; hence, it can be used by autonomous security operation centers, cyber-forensic investigators and manually initiated evidences under chain-of-custody for man-made crimes. Security services are assured as required by the framework. IoF is experimented and compared with the other state-of-the-art frameworks. The outcomes and analysis prove the efficiency of IoF concerning complexity, time consumption, memory and CPU utilization, gas consumption, and energy analysis.

物联网（IoT）范式中的数字取证至关重要，因为其异质性和缺乏证据处理的透明度。此外，跨境合法化在与云取证问题有关的此类流程中构成障碍。这就要求物联网的法证框架能够提供分布式计算，去中心化以及跨界角度对数字证据进行法证调查的透明度。为此，我们提出了用于物联网取证的框架，以解决上述问题。提议的解决方案称为取证互联网（IoF）考虑了针对数字取证的区块链量身定制的IoT框架。它提供了一个调查过程的透明视图，该调查过程在单个框架中涉及所有利益相关者（例如，异构设备和云服务提供商）。它使用基于区块链的案例链来处理调查过程，包括监管链和证据链。联盟使用共识来解决跨国界合法化的问题。这对于透明且易于取证的参考也是有益的。可编程的基于格的密码原语降低了复杂度。它显示了功耗感知设备的优势，并为所提出的想法增加了新的内容。IoF是通用的；因此，自治安全运营中心可以使用它，网络法医调查人员，并根据人为犯罪在监管链下手动提出证据。框架要求确保安全服务。对IoF进行了实验，并将其与其他最新框架进行了比较。结果和分析证明了IoF在复杂性，时间消耗，内存和CPU利用率，气体消耗和能源分析方面的效率。