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    • 6. 发明授权
    • Combination-based broadcast encryption method
    • 基于组合的广播加密方式
    • US08200963B2
    • 2012-06-12
    • US11311256
    • 2005-12-20
    • Weon-il JinDae-youb KimHwan-joon KimSung-joon Park
    • Weon-il JinDae-youb KimHwan-joon KimSung-joon Park
    • H04L29/06
    • H04L9/0833G06F21/10H04L9/0822H04L2209/601
    • A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.
    • 基于组合的广播加密方法包括:由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥,通过使用导出的组密钥加密会话密钥,以及将加密的会话密钥发送给每个用户。 因此,通过组合为每个用户分配不同的基站,从而具有防止串通攻击的安全性。
    • 8. 发明授权
    • Combination-based broadcast encryption method
    • 基于组合的广播加密方式
    • US08897445B2
    • 2014-11-25
    • US13460098
    • 2012-04-30
    • Weon-il JinDae-youb KimHwan-joon KimSung-joon Park
    • Weon-il JinDae-youb KimHwan-joon KimSung-joon Park
    • H04L9/08G06F21/10
    • H04L9/0833G06F21/10H04L9/0822H04L2209/601
    • A combination-based broadcast encryption method includes: assigning by a server a base group of different combinations to each user; producing and sending secret information for each user by using as a base the base group allocated to each user; producing and sending an inverse-base parameter value through calculations with integers used to produce the base group and key value information of one or more privileged users; and deriving a group key by using the key value information of the privileged users, encrypting a session key by using the derived group key, and sending the encrypted session key to each user. Accordingly, each user is assigned a different base through a combination, thereby having security against collusion attacks.
    • 基于组合的广播加密方法包括:由服务器分配不同组合的基组给每个用户; 通过使用分配给每个用户的基本组作为基础来生成和发送每个用户的秘密信息; 通过用于产生基本组的整数和一个或多个特权用户的键值信息的计算产生和发送反基本参数值; 以及通过使用所述特权用户的密钥值信息来导出组密钥,通过使用导出的组密钥加密会话密钥,以及将加密的会话密钥发送给每个用户。 因此,通过组合为每个用户分配不同的基站,从而具有防止串通攻击的安全性。