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