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摘要： 目前的多等级门限共享方案中，高等级用户的作用可以被若干个低等级用户联合取代，而多秘密门限共享方案中，所有秘密只能在同一级门限下共享。为克服这两个问题，利用Birkhoff插值法和离散对数的困难性，提出了一个可认证的多等级门限多秘密共享方案。该方案可以同时划分多个等级，而每级门限下可以共享多个秘密。每个参与者只需持有一个子秘密，方便管理与使用。
