The finite length of Hash chain limits its applications.Based on one time signature（OTS） technique

a scheme of self-renewable Hash chain（SRHC） is proposed.The proposed scheme not has the whole properties of conventional Hash chains but also renews itself periodically in a secure and smooth way via securely delivering bits of next verification anchor using OTS.A proof is stated to show that SRHC is secure and its security completely relies on the Hash function deployed.Compared with conventional Hash chains

SRHC renews itself efficiently

smoothly and securely and has some enforced security properties such as finer granularity authentication and proactive recovery.