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中文摘要：
为了设计能够抗量子攻击的广播加密方案，利用盆景树模型在随机格上构造了一个新的身份类广播加密方案．解决了格基广播加密方案存在的解密失败问题．在标准模型下，证明了该方案是抗选择明文攻击安全的，且安全性归约到格上错误学习问题．同时该方案能够有效地实现用户端的动态扩展和无状态接收功能．
英文摘要：
To design a post-quantum secure broadcast encryption scheme, by using the bonsai trees model, an identity-based broadcast encryption scheme over lattice is proposed. The proposed scheme can avoid the decryption failure problem in the existing scheme. The new scheme is provable securied against chosen-plaintext attack where the security is reduced to the hardness of learning with errors in the standard model. Moreover the proposed scheme supports the dynamic expansion of client and deals with the setting of stateless receivers.
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