会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Public key cryptosystem key management based on control vectors
    • 基于控制向量的公钥关键CRYPTOSYSTEM密钥管理
    • US5200999A
    • 1993-04-06
    • US766260
    • 1991-09-27
    • Stephen M. MatyasDonald B. JohnsonAn V. LeRostislaw PrymakWilliam C. MartinWilliam S. RohlandJohn D. Wilkins
    • Stephen M. MatyasDonald B. JohnsonAn V. LeRostislaw PrymakWilliam C. MartinWilliam S. RohlandJohn D. Wilkins
    • G09C1/00G06F9/30H04L9/08
    • H04L9/0844G06F9/30007G06F9/30018H04L9/088H04L2209/12H04L2209/38
    • A data processing system, method and program are disclosed, for managing a public key cryptographic system. The method includes the steps of generating a first public key and a first private key as a first pair in the data processing system, for use with a first public key algorithm and further generating a second public key and a second private key as a second pair in the data processing system, for use with a second public key algorithm. The method then continues by assigning a private control vector for the first private key and the second private key in the data processing system, for defining permitted uses for the first and second private keys. Then the method continues by forming a private key record which includes the first private key and the second private key in the data processing system, and encrypting the private key record under a first master key expression which is a function of the private control vector. The method then forms a private key token which includes the private control vector and the private key record, and stores the private key token in the data processing system.At a later time, the method receives a first key use request in the data processing system, requiring the first public key algorithm. In response to this, the method continues by accessing the private key token in the data processing system and checking the private control vector to determine if the private key record contains a key having permitted uses which will satisfy the first request. The method then decrypts the private key record under the first master key expression in the data processing system and extracts the first private key from the private key record. The method selects the first public key algorithm in the data processing system for the first key use request and executes the first public key algorithm in the data processing system using the first private key to perform a cryptographic operation to satisfy the first key use request.
    • 6. 发明授权
    • Secure key management using programable control vector checking
    • 使用可编程控制向量检查实现安全密钥管理
    • US5007089A
    • 1991-04-09
    • US506319
    • 1990-04-09
    • Stephen M. MatyasDonald B. JohnsonAn V. LeWilliam C. MartinRostislaw PrymakJohn D. Wilkins
    • Stephen M. MatyasDonald B. JohnsonAn V. LeWilliam C. MartinRostislaw PrymakJohn D. Wilkins
    • G06F21/22G09C1/00H04L9/08
    • H04L9/088
    • The invention includes a control vector checking code respository located either within the same system as the crytographic facility or alternately remotely from the system containing the cryptographic facility. The control vector checking code repository will be linked to the cryptographic facility by one of several means. A first means for linking the repository to the cryptographic facility would include a physically secure data communications link. A second means for connecting the repository to the cryptographic facility would be by using an insecure channel with authentication, wherein either a modification detection code or alternately a message authentication code would be transmitted to the cryptographic facility and then the desired control vector checking code would be transmitted over the link. The cryptographic facility will include a code authorization mechanism to compare the transmitted MAC or MDC with a corresponding value computed from the received control vector checking code. If the two values of the MDC or the MAC compare, then the control vector checking code is authenticated and loaded into the control vector checking unit for carrying out the control vector checking operations desired. The control vector checking code repository can be located in a remote system connected by means of the communications link to the crypto facility, or alternately the repository can reside in the same system as the crypto facility. This provides for the dynamic updating of control vector checking code, where improvements or alterations are made to the control vector checking sequence. This also provides for a reduced memory size in the crypto facility, being sufficiently large to accommodate subsidiary control vector checking applications, with alternate control vector checking applications requiring the reloading of the control vector checking unit from the repository.
    • 8. 发明授权
    • Methods and circuits for testing open collectors and open drains
    • 开放收集器和开放式排水管的测试方法和电路
    • US06107814A
    • 2000-08-22
    • US530936
    • 1995-09-20
    • William C. Martin
    • William C. Martin
    • G01R31/28
    • G01R31/31715
    • The present invention is directed to methods and circuits for testing open collector or open drain output pads. In a preferred embodiment, the open collector or open drain outputs are hard driven to both their normal low and high level logic states during a test mode of operation. By actively driving open collector or open drain output pads to both their active and their inactive states, the existence of a stable output at any given sample time is guaranteed during a functionality test. The need to accurately estimate time delays associated with RC loads of external circuitry and the need to precisely strobe an open collector or open drain output following transition to an inactive, disabled state are therefore eliminated. Further, control signal inputs associated with a high impedance condition of open collector or open drain output pads can be directly examined at the circuit output using appropriate test logic.
    • 本发明涉及用于测试开路集电极或开漏输出焊盘的方法和电路。 在优选实施例中,开路集电极或开漏输出在测试操作模式期间被硬驱动到其正常的低电平和高电平逻辑状态。 通过主动驱动开路集电极或开路漏极输出焊盘到其有源和无效状态,在功能测试期间保证任何给定采样时间的稳定输出的存在。 因此,需要精确地估计与外部电路的RC负载相关联的时间延迟,并且在转换到非活动的禁用状态之后,需要精确地选通开路集电极或开漏输出。 此外,可以使用适当的测试逻辑在电路输出处直接检查与开路集电极或开漏输出焊盘的高阻抗条件相关联的控制信号输入。
    • 10. 发明授权
    • Computer cooling system using recycled coolant
    • 使用回收冷却液的计算机冷却系统
    • US4644443A
    • 1987-02-17
    • US781064
    • 1985-09-27
    • Michael W. SwensenWilliam C. MartinHenry H. Kight
    • Michael W. SwensenWilliam C. MartinHenry H. Kight
    • H05K7/20
    • H05K7/20572
    • An enclosed, electronic system has a plurality of lower power-dissipating electronic components mounted on a chassis. The components are positioned adjacent each other to form low volume fluid ducts therebetween. A low volume fluid duct is formed between one side of the plurality and one end enclosure of the system. At least one higher power-dissipating electronc component is also mounted on the chassis, forming a high volume fluid duct between one of its sides and one side of the last of the lower power-dissipating electronic components, and a high volume fluid duct also formed between the other side of the higher power-dissipating electronic component and the other end enclosure. Air is caused to blow through the low volume fluid duct and then to be exhausted through the high volume fluid ducts. The rate of air flow through the high volume ducts is one half of the minimum required to cool the higher power-dissipating component. The rate of air flow through the low volume fluid ducts is at least one half of that required to cool each of the lower power-dissipating electronic components. By exhausting the cooling air from the low volume fluid channels through the high volume fluid ducts, the air flow required is less than the total required for the low volume fluid ducts plus the high volume fluid ducts.
    • 封闭的电子系统具有安装在底盘上的多个较低功率耗散的电子部件。 这些部件彼此相邻地定位,以在它们之间形成低体积的流体管道。 在系统的多个一端和一端封套之间形成低体积的流体管道。 至少一个较高的功率消耗电子部件也安装在底盘上,在其一侧和最后一个功率耗散电子部件的一侧之间形成大体积的流体管道,并且还形成了大体积的流体管道 在较高功率耗散电子部件的另一侧和另一端壳体之间。 使空气吹过低体积流体管道,然后通过高体积流体管道排出。 通过高容量管道的空气流速是冷却较高功率耗散部件所需的最小值的一半。 通过低体积流体管道的空气流速是冷却每个较低功率耗散电子部件所需的空气流量的至少一半。 通过从低体积流体通道排出冷却空气通过高容积流体管道,所需的空气流量小于低体积流体管道加上高体积流体管道所需的总气流量。