Although digital signature has been a fundamental technology for cryptosystems, it still draws considerable attention from both academia and industry due to the recent raising interest in blockchains. This article revisits the subliminal channel existing digital signature and reviews its abuse risk of the constructor’s private key. From a different perspective on the subliminal channel, we find the new concept named the chamber of secrets in blockchains. The found concept, whereby the secret is hidden and later recovered by the constructor from the common transactions in a blockchain, highlights a new way to encourage implementing various applications to benefit efficiency and security. Thus, the proposed scheme benefits from the following advantages: (1) avoiding the high maintenance cost of certificate chain of certificate authority, or public key infrastructure, and (2) seamlessly integrating with blockchains using the property of chamber of secrets. In order to easily understand the superiority of this new concept, a remote authentication scenario is taken as a paradigm of IoT to demonstrate that the further advantages are achieved: (1) avoiding high demand for storage space in IoT devices, and (2) avoiding maintaining a sensitive table in IoT server.

中文翻译：

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重访—区块链的潜意识渠道及其在物联网安全中的应用

尽管数字签名已经成为密码系统的一项基本技术，但是由于最近对区块链的兴趣日益增加，它仍然引起了学术界和工业界的极大关注。本文回顾了潜意识渠道现有的数字签名，并回顾了其对构造函数私钥的滥用风险。从潜意识通道的不同角度来看，我们发现了名为区块链秘密会议厅的新概念。所发现的概念将秘密隐藏起来，然后由构造函数从区块链中的常见交易中恢复，该概念突显了一种鼓励实施各种应用程序以提高效率和安全性的新方法。因此，所提出的方案具有以下优点：（1）避免了证书颁发机构或公共密钥基础结构的证书链的高维护成本；（2）利用密室的属性与区块链无缝集成。为了轻松理解此新概念的优越性，以远程身份验证方案作为物联网的范例来证明实现了进一步的优势：（1）避免了对物联网设备中存储空间的高需求，以及（2）避免了在IoT服务器中维护敏感表。