Recently, Dutta et al. have proposed some very efficient self-healing key distribution schemes with revocation by using one-way key chains. However, we show that Dutta's scheme is insecure against the proposed attacks. Then we proposed a secure and efficient self-healing key distribution scheme to overcome the flaws of Dutta's scheme. The proposed scheme reduces the user's storage overhead to a constant value 4logq, and the communication overhead is also optimal. Moreover, we analyze our scheme and prove that it is unconditionally secure and achieves both forward secrecy and backward secrecy.
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