公开(公告)号：US20080270790A1

公开(公告)日：2008-10-30

申请号：US11948861

申请日：2007-11-30

申请人： Ernest F. Brickell ,  Jiangtao Li

发明人： Ernest F. Brickell ,  Jiangtao Li

IPC分类号： H04L9/32 ,  H04L9/30

CPC分类号： H04L9/3234 ,  G06F21/57 ,  H04L9/3013 ,  H04L9/3221 ,  H04L9/3247 ,  H04L2209/42 ,  H04L2209/56

摘要： In some embodiments, a method and apparatus for enhanced revocation of direct proof and direct anonymous attestation are described. In one embodiment a trusted hardware device verifies that membership of the device within a trusted membership group is not revoked according to a revocation list received with a challenge request from a verifier. Once such verification is performed, the device convinces the verifier of possessing cryptographic information without revealing unique, device identification information of the trusted hardware device or the cryptographic information. In one embodiment, the trusted hardware device computes a digital signature on a message received with the challenge request to the verifier if membership of the anonymous hardware device within a trusted membership group is verified. In one embodiment, the verifier authenticates the digital signature according to a public key of the trusted membership group to enable a trusted member device to remain anonymous to the verifier. Other embodiments are described and claimed.

摘要翻译： 在一些实施例中，描述了用于增强直接证明和直接匿名证明的撤销的方法和装置。 在一个实施例中，可信硬件设备根据从验证者接收到的询问请求的撤销列表来验证受信任的成员资格组内的设备的成员资格是否被撤销。 一旦执行了此类验证，该设备就可以说服验证者拥有加密信息，而不会泄露可信硬件设备或加密信息的唯一设备识别信息。 在一个实施例中，如果验证了可信任的成员资格组内的匿名硬件设备的成员资格，那么可信硬件设备将向接收到的询问请求的消息中的数字签名计算给验证者。 在一个实施例中，验证者根据受信任的成员资格群组的公开密钥对数字签名进行认证，以使受信任的成员设备对验证者保持匿名。 描述和要求保护其他实施例。

公开(公告)号：US4845749A

公开(公告)日：1989-07-04

申请号：US135917

申请日：1987-12-21

申请人： Ernest F. Brickell ,  Pil J. Lee ,  Yacov Yacobi

发明人： Ernest F. Brickell ,  Pil J. Lee ,  Yacov Yacobi

IPC分类号： H04K1/00

CPC分类号： H04K1/00

摘要： A secure audio teleconferencing system is disclosed. The secure teleconferencing system comprises a centralized facility or bridge to which a plurality of participants is connected. The role of the bridge is to receive encrypted message signals from the participants and to add the encrypted message signals, modulo some known number. The result is then transmitted to the participants. Each participant is able to decrypt the modular sum of encrypted message signals, to obtain the desired ordinary sum of clear text message signals. In accordance with the invention, the message signals remain encrypted throughtout processing by the bridge. There are no non-encrypted messages.

摘要翻译： 公开了一种安全的音频电话会议系统。 安全电话会议系统包括多个参与者连接到的集中设施或桥。 桥的作用是从参与者接收加密的消息信号，并添加加密的消息信号，模数一些已知数字。 然后将结果传输给参与者。 每个参与者能够解密加密消息信号的模数和，以获得期望的明文消息信号的普通和。 根据本发明，消息信号通过桥接器保持加密的遍历处理。 没有未加密的消息。