Anonymous communication system provides a secure environment without\n leaking metadata, which has many application scenarios in IoT

Anonymous Identity Based Encryption (AIBET) scheme allows a tracer to use the\ntracing key to reveal the recipient's identity from the ciphertext while\nkeeping other data anonymous. This special feature makes AIBET a promising\nsolution to distributed IoT data security. In this paper, we construct an\nefficient quantum-safe Hierarchical Identity-Based cryptosystem with Traceable\nIdentities (AHIBET) with fully anonymous ciphertexts. We prove the security of\nthe AHIBET scheme under the Learning with Errors (LWE) problem in the standard\nmodel.\n