The ciphertext policy is a promising cryptographic technique for smart home data security, and the secrecy of the encryption key purely depends on the security of the key derivation mechanism. In a smart home network, many devices have limited computational and communication resources, and any such mechanism to create a security key should consider these computational and communicational constraints. In this paper, we propose a collaborative and verifiable key derivation protocol based on elliptic curve cryptography for smart home security. Our construction realizes a distributed computation of the security key without adding any extra energy consumption. The proposed collaborative mechanism effectively solves not only the key derivation mechanism security issue, but also adds a verifiability function to avoid keys falsification. Meanwhile, it helps markedly reduce the key derivation overhead at the energy constrained device. A comparison with other collaborative and non collaborative key derivation schemes, demonstrates that our scheme has somewhat better performance in terms of energy overhead at the constrained device side. Also, we provide proof of security of the proposed protocol.

中文翻译：

---

用于智能家居安全的协作且可验证的密钥派生协议：CV-KDP

密文策略是一种用于智能家居数据安全性的有前途的加密技术，并且加密密钥的保密性完全取决于密钥派生机制的安全性。在智能家庭网络中，许多设备的计算和通信资源有限，并且创建安全密钥的任何此类机制都应考虑这些计算和通信约束。在本文中，我们提出了一种基于椭圆曲线密码学的协作且可验证的密钥派生协议，用于智能家居安全。我们的构造实现了安全密钥的分布式计算，而不会增加任何额外的能耗。所提出的协作机制不仅有效地解决了密钥派生机制的安全性问题，而且还增加了可验证性功能来避免密钥被伪造。与此同时，它有助于显着减少能量受限设备的密钥导出开销。与其他协作式和非协作式密钥派生方案的比较表明，就受限设备侧的能量开销而言，我们的方案具有更好的性能。此外，我们提供了所提议协议的安全性证明。