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    • 1. 发明授权
    • Systems and methods for identity-based encryption and related cryptographic techniques
    • 用于基于身份的加密和相关加密技术的系统和方法
    • US09356779B2
    • 2016-05-31
    • US13369165
    • 2012-02-08
    • Dan BonehMatthew Franklin
    • Dan BonehMatthew Franklin
    • G06F21/00H04L29/06H04L9/08H04L9/30
    • H04L9/0847H04L9/3073H04L2209/04
    • A method and system for encrypting a first piece of information M to be sent by a sender [100] to a receiver [110] allows both sender and receiver to compute a secret message key using identity-based information and a bilinear map. The sender uses a bilinear map to encrypt a message M, producing ciphertext V to be sent from the sender [100] to the receiver [110]. The receiver [110] uses the bilinear map to decrypt V and recover the original message M. According to one embodiment, the bilinear map is based on a Weil pairing or a Tate pairing defined on a subgroup of an elliptic curve. Also described are several applications of the techniques, including key revocation, credential management, and return receipt notification.
    • 用于加密由发送器[100]发送给接收机[110]的第一条信息M的方法和系统允许发送方和接收方使用基于身份的信息和双线性映射来计算秘密消息密钥。 发送方使用双线性映射来加密消息M,产生要从发送方[100]发送到接收方[110]的密文V。 接收机[110]使用双线性映射来解密V并恢复原始消息M.根据一个实施例,双线性映射基于在椭圆曲线的子组上定义的Weil配对或Tate配对。 还描述了技术的若干应用,包括关键撤销,凭证管理和回报收据通知。
    • 4. 发明申请
    • Delegation system for decryption rights
    • 授权系统解密权
    • US20080170701A1
    • 2008-07-17
    • US11894448
    • 2007-08-21
    • Toshihiko MatsuoDan BonehEu-Jin Goh
    • Toshihiko MatsuoDan BonehEu-Jin Goh
    • H04L9/08H04L9/30H04L9/14
    • H04L9/083H04L9/3073H04L63/0442H04L63/0478H04L2209/603H04L2209/76
    • An object of this ciphertext decryption rights delegation system is to enable conversion of PKE-system ciphertext into IBE-system encrypted ciphertext, and, in a delegation system with users using only an IBE system, of preventing restoration of the master-secret key generated by a PKG device (public key generation device) even when there is collusion attack between the ciphertext converter and a decryption rights delegatee. A ciphertext decryption rights delegation system realizes delegation of ciphertext decryption rights between a device used by a decryption rights delegator and a device used by a decryption rights delegatee. From the master-secret key stored in the PKG device which generates secret keys, a secret key of the IBE system and auxiliary information are generated, and a re-encryption key is generated based on this auxiliary information. When sharing content, ciphertext encrypted by the decryption rights delegator device is converted by a ciphertext conversion device using the re-encryption key, and the converted ciphertext is decoded by the decryption rights delegatee device using the IBE-system secret key.
    • 该密文解密权限委托系统的一个目的是能够将PKE系统密文转换成IBE系统加密的密文,并且在仅使用IBE系统的用户的授权系统中,防止恢复由主机秘密密钥生成的主秘密密钥 PKG设备(公共密钥生成设备)即使在密文转换器和解密权限代理之间存在串通攻击的情况下也是如此。 密文解密权限委托系统在解密权利委托人使用的设备与解密权限委托使用的设备之间实现密文解密权限的授权。 从存储在生成秘密密钥的PKG设备中的主秘密密钥生成IBE系统的秘密密钥和辅助信息,并且基于该辅助信息生成重新加密密钥。 当共享内容时,使用重新加密密钥通过密文转换装置转换由解密权限委托装置加密的密文,并且使用IBE系统密钥由解密权限委托装置解码转换的密文。
    • 7. 发明授权
    • Identity-based-encryption system
    • 基于身份的加密系统
    • US08320559B1
    • 2012-11-27
    • US12537231
    • 2009-08-06
    • Dan BonehXavier Boyen
    • Dan BonehXavier Boyen
    • H04K1/00H04L9/30
    • H04L9/3073H04L9/0841H04L63/0428H04L63/06
    • Systems and methods for supporting symmetric-bilinear-map and asymmetric-bilinear-map identity-based-encryption (IBE) key exchange and encryption schemes are provided. IBE key exchange schemes use an IBE encapsulation engine to produce a secret key and an encapsulated version of the secret key. An IBE unencapsulation engine is used to unencapsulate the encapsulated key. IBE encryption schemes use an IBE encryption engine to produce ciphertext from plaintext. An IBE decryption engine is used to decrypt the ciphertext to reveal the plaintext. The IBE unencapsulation engine and decryption engines use bilinear maps. The IBE encapsulation and encryption engines perform group multiplication operations without using bilinear maps, improving efficiency. IBE private keys for use in decryption and unencapsulation operations may be generated using a distributed key arrangement in which each IBE private key is assembled from private key shares.
    • 提供了支持对称双线性映射和非对称双线性映射身份加密(IBE)密钥交换和加密方案的系统和方法。 IBE密钥交换方案使用IBE封装引擎来产生秘密密钥和秘密密钥的封装版本。 使用IBE未封装引擎来封装封装的密钥。 IBE加密方案使用IBE加密引擎从明文生成密文。 IBE解密引擎用于解密密文以显示明文。 IBE未封装引擎和解密引擎使用双线性映射。 IBE封装和加密引擎在不使用双线性映射的情况下执行组乘法运算,从而提高效率。 可以使用分布式密钥布置来生成用于解密和未封装操作的IBE私钥,其中每个IBE私钥由私人密钥共享组合。
    • 10. 发明授权
    • Systems and methods for identity-based encryption and related cryptographic techniques
    • 用于基于身份的加密和相关加密技术的系统和方法
    • US08130964B2
    • 2012-03-06
    • US12589880
    • 2009-10-28
    • Dan BonehMatthew Franklin
    • Dan BonehMatthew Franklin
    • H04L9/30H04L9/00H04L9/08H04L9/28H04K1/00G06F17/00G06F21/24G09C1/00H04L12/22
    • H04L9/0847H04L9/3073H04L2209/04
    • A method and system for encrypting a first piece of information M to be sent by a sender [100] to a receiver [110] allows both sender and receiver to compute a secret message key using identity-based information and a bilinear map. In a one embodiment, the sender [100] computes an identity-based encryption key from an identifier ID associated with the receiver [110]. The identifier ID may include various types of information such as the receiver's e-mail address, a receiver credential, a message identifier, or a date. The sender uses a bilinear map and the encryption key to compute a secret message key gIDr, which is then used to encrypt a message M, producing ciphertext V to be sent from the sender [100] to the receiver [110] together with an element rP. An identity-based decryption key dID is computed by a private key generator [120] based on the ID associated with the receiver and a secret master key s. After obtaining the private decryption key from the key generator [120], the receiver [110] uses it together with the element rP and the bilinear map to compute the secret message key gIDr, which is then used to decrypt V and recover the original message M. According to one embodiment, the bilinear map is based on a Weil pairing or a Tate pairing defined on a subgroup of an elliptic curve. Also described are several applications of the techniques, including key revocation, credential management, and return receipt notification.
    • 用于加密由发送器[100]发送给接收机[110]的第一条信息M的方法和系统允许发送方和接收方使用基于身份的信息和双线性映射来计算秘密消息密钥。 在一个实施例中,发送器[100]从与接收机[110]相关联的标识符ID计算基于身份的加密密钥。 标识符ID可以包括诸如接收者的电子邮件地址,接收者凭证,消息标识符或日期的各种类型的信息。 发送方使用双线性映射和加密密钥来计算秘密消息密钥gIDr,然后将其用于加密消息M,产生要从发送方[100]发送到接收方[110]的密文V以及元素 rP。 基于身份的解密密钥dID由私钥生成器[120]基于与接收者相关联的ID和秘密主密钥s计算。 在从密钥生成器[120]获得私有解密密钥之后,接收机110将其与元素rP和双线性映射一起使用以计算秘密消息密钥gIDr,然后将密钥gIDr用于解密V并恢复原始消息 M.根据一个实施例,双线性映射基于在椭圆曲线的子组上定义的Weil配对或Tate配对。 还描述了技术的若干应用,包括密钥撤销,凭证管理和回执接收通知。