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1. 发明授权

US06396929B1 Apparatus, method, and computer program product for high-availability multi-agent cryptographic key recovery 有权
标题翻译：用于高可用性多代理加密密钥恢复的装置，方法和计算机程序产品
公开(公告)号：US06396929B1
公开(公告)日：2002-05-28
申请号：US09224892
申请日：1998-12-31
申请人： Sekar Chandersekaran , Sohail Malik , Michael Muresan , Narayanan Vasudevan
发明人： Sekar Chandersekaran , Sohail Malik , Michael Muresan , Narayanan Vasudevan
IPC分类号： H04L930
CPC分类号： H04L9/0894
摘要： An apparatus, method, and computer program product for high-availability multi-agent cryptographic key recovery. The present invention defines a key recovery block that specifies allowable subsets of the total set of key recovery agents that can participate in a key recovery. For each subset, key recovery information is computed and stored after the subset is specified. This key recovery information is only useable by that subset because it is computed using that subset of public keys of the agents. When key recovery is initiated, a trusted processor (a key recovery coordinator) validates the contents of the key recovery block and it uses and is allowed to use any of the subsets of the agents to process the key recovery request. Since many subsets could be specified, the likelihood of key recovery failure is greatly diminished.
摘要翻译：一种用于高可用性多代理加密密钥恢复的设备，方法和计算机程序产品。本发明定义了密钥恢复块，其指定可以参与密钥恢复的密钥恢复代理的总组的可允许子集。对于每个子集，在子集被指定之后，计算并存储密钥恢复信息。该密钥恢复信息只能由该子集使用，因为它是使用代理的公钥的该子集来计算的。当启动密钥恢复时，受信任的处理器（密钥恢复协调器）验证密钥恢复块的内容，并使用密钥恢复块，并允许其使用代理的任何子集来处理密钥恢复请求。由于可以指定许多子集，因此密钥恢复失败的可能性大大降低。

2. 发明授权

US06877092B2 Apparatus, method, and computer program product for achieving interoperability between cryptographic key recovery enabled and unaware systems 失效
标题翻译：装置，方法和计算机程序产品，用于实现加密密钥恢复启用和不知情系统之间的互操作性
公开(公告)号：US06877092B2
公开(公告)日：2005-04-05
申请号：US10287172
申请日：2002-11-04
申请人： Sekar Chandersekaran , Sohail Malik , Michael Muresan , Narayanan Vasudevan
发明人： Sekar Chandersekaran , Sohail Malik , Michael Muresan , Narayanan Vasudevan
IPC分类号： H04L9/08 , H04L9/12 , H04L9/00
CPC分类号： H04L9/0894
摘要： An apparatus, method, and computer program product for achieving interoperability between cryptographic key recovery enabled and unaware systems. The method includes the steps of encrypting data using a cryptography key to generate ciphertext; generating a key recovery block containing key recovery information for the ciphertext; determining whether a receiver for the ciphertext is key recovery unaware; and sending the key recovery block to a key recovery client when it is determined that the receiver is key recovery unaware. In a preferred embodiment, the ciphertext is sent to the receiver only after receiving confirmation from the key recovery client of the receipt of the key recovery block. Also in a preferred embodiment, the key recovery block is sent as part of an Internet Message Control Protocol (ICMP) message.
摘要翻译：一种用于实现加密密钥恢复启用和不知情系统之间的互操作性的装置，方法和计算机程序产品。该方法包括使用加密密钥加密数据以生成密文的步骤; 生成包含用于密文的密钥恢复信息的密钥恢复块; 确定用于密文的接收者是否没有密钥恢复; 并且当确定接收机是密钥恢复不知道时，将密钥恢复块发送到密钥恢复客户端。在优选实施例中，只有在接收到密钥恢复块的密钥恢复客户端的确认之后，才将密文发送给接收者。同样在优选实施例中，密钥恢复块作为因特网消息控制协议（ICMP）消息的一部分被发送。

3. 发明授权

US06335972B1 Framework-based cryptographic key recovery system 失效
标题翻译：基于框架的加密密钥恢复系统
公开(公告)号：US06335972B1
公开(公告)日：2002-01-01
申请号：US08971204
申请日：1997-11-14
申请人： Sekar Chandersekaran , Sarbari Gupta
发明人： Sekar Chandersekaran , Sarbari Gupta
IPC分类号： H04L932
CPC分类号： H04L63/0428 , H04L9/0894
摘要： A Secure Key Management Framework (SKMF) defines an infrastructure for a complete set of cryptographic services augmented with key recovery enablement. There are three major layers—the application layer invokes the SKMF layer, while the SKMF layer invokes the service provider (SP) layer. The application layer code invokes the cryptographic API and key-recovery API supported by the SKMF. Multiple key recovery mechanisms and cryptographic mechanisms can be implemented as service providers that log-in underneath the framework using the well-defined service provider interfaces provided by the framework. The SKMF implements the supported ATP calls by making appropriate invocations of the service provider modules using the SPIs.
摘要翻译：安全密钥管理框架（SKMF）为通过密钥恢复实现增强的一整套加密服务定义了基础设施。有三个主要层 - 应用层调用SKMF层，而SKMF层调用服务提供者（SP）层。应用层代码调用SKMF支持的加密API和密钥恢复API。多个密钥恢复机制和加密机制可以被实现为使用由框架提供的明确定义的服务提供者接口在框架下登录的服务提供商。 SKMF通过使用SPI对服务提供商模块进行适当的调用来实现支持的ATP调用。

4. 发明授权

US06181795B2 Portable cryptographic key 失效
标题翻译：便携式加密密钥
公开(公告)号：US06181795B2
公开(公告)日：2001-01-30
申请号：US09031793
申请日：1998-02-27
申请人： Sekar Chandersekaran , Narayanan Vasudevan , Sohail Malik , Michael Muresan
发明人： Sekar Chandersekaran , Narayanan Vasudevan , Sohail Malik , Michael Muresan
IPC分类号： H04L900
CPC分类号： H04L9/0819
摘要： A method, system, and computer program are disclosed to transport an encrypted key across multiple, diverse systems which provides the relevant and necessary information to guarantee a successful decryption of the key. The method prepares an ASN.1 encoding file at the sender which contains the key. The receiver performs the method to decode the ASN.1 encoded file. In this manner, only the data and the contents of the portable key need to be sent to guarantee successful decryption at the receiver.
摘要翻译：公开了一种方法，系统和计算机程序，用于在多个不同的系统之间传输加密的密钥，其提供相关和必要的信息以保证密钥的成功解密。该方法在包含密钥的发送方准备一个ASN.1编码文件。接收机执行解码ASN.1编码文件的方法。以这种方式，仅需要发送便携式密钥的数据和内容以保证在接收机处的成功解密。

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