A Note on an Improved Self-Healing Group Key Distribution Scheme

In 2014, Chen et al. proposed a one-way hash self-healing group key distribution scheme for resource-constrained wireless networks in the journal of Sensors (14(14):24358-24380, doi: 10.3390/s141224358). They asserted that their Scheme 2 achieves [Formula: see text]-revocation capability, [Formula: see text]-wise forward secrecy, [Formula: see text]-wise backward secrecy and has [Formula: see text]-wise collusion attack resistance capability. Unfortunately, this paper pointed out that their scheme does not satisfy the forward security, [Formula: see text]-revocation capability and [Formula: see text]-wise collusion attack resistance capability.