一种可定期更新的多秘密共享方案

Periodically renewed multi-secret sharing scheme

基于椭圆曲线密码体制,在PANG-WANG(t,n)多秘密共享方案的基础上,提出了一种新的多重秘密共享方案。在该方案中,参与者能自主选择子密钥;且参与者的秘密份额能定期更新。与PANG-WANG方案相比,该方案解决了原方案子密钥必须由庄家发放、秘密份额不可更新等问题,具有较好的灵活性和更高的安全性。

A new multi-secret sharing scheme was proposed based on elliptic curve cryptography and PANG-WNAG＇s （t, n） multi-secret sharing scheme. The scheme has properties as follows： （1） participants can choose sub-secrets by themselves; （2） shadows of every participant can be renewed periodically. Compared with PANG-WANG＇s scheme, this scheme compensates for the disadvantages of the original scheme such as sub-secrets must be chosen by dealer and shadows cannot be renewed, so this scheme has better flexibility and higher security.