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    • 2. 发明授权
    • Secure processor for extreme outdoor temperature conditions
    • 安全处理器,用于极端室外温度条件
    • US08522049B1
    • 2013-08-27
    • US12221289
    • 2008-07-31
    • Reza Ahmadi
    • Reza Ahmadi
    • H04L9/06H04L29/02
    • G06F21/86G06F2221/2143H01L2224/48227H01L2924/15311H05K1/0212H05K1/0275H05K2201/09681
    • If the temperature of a secure device falls below a second temperature, then sensitive information is automatically erased from a secure memory. To allow the secure device to operate in very cold ambient temperatures that are below the second temperature, a novel heater circuit is provided. If the temperature of the secure device drops below a first temperature, then the heater heats the secure processor. If AC power is lost, such as in a power outage, energy for the heater is provided by a secure battery, otherwise the heater is powered from an external source. The heater barely provides enough heat to keep the temperature of the secure processor at the first temperature under normal heat transfer conditions. If an attacker withdraws heat from the circuit unusually rapidly, then the temperature of the secure processor will fall to the second temperature causing a tamper detect and secure memory erasure.
    • 如果安全装置的温度低于第二温度,则敏感信息将从安全存储器中自动擦除。 为了使安全装置在低于第二温度的非常寒冷的环境温度下工作,提供了一种新颖的加热器电路。 如果安全装置的温度低于第一温度,则加热器加热安全处理器。 如果AC电源丢失,例如断电,加热器的能量由安全电池提供,否则加热器由外部电源供电。 加热器几乎没有提供足够的热量,以在正常的热传递条件下将安全处理器的温度保持在第一温度。 如果攻击者非常快速地从电路中提取热量,则安全处理器的温度将下降到第二个温度,导致篡改检测并确保内存擦除。
    • 8. 发明授权
    • Method and apparatus for detecting a fault condition and restoration thereafter using user context information
    • 用于使用用户上下文信息检测故障状况和恢复的方法和装置
    • US07702955B2
    • 2010-04-20
    • US11319926
    • 2005-12-28
    • Adrian S. de AlmeidaMohammad-Reza AhmadiIvan Wong Yin YangHongtao YHT Yan
    • Adrian S. de AlmeidaMohammad-Reza AhmadiIvan Wong Yin YangHongtao YHT Yan
    • G06F11/00
    • G06F11/1441
    • A processing unit of a system detects a fault condition associated with the co-processing unit and, upon detection, restores the processing unit using stored user context information. During normal operation, user context information used to execute operation commands are stored by the co-processing unit in memory and maintained after fault detection. A fault condition is detected when at least a portion of the processing unit is rendered non-operational due to a discharging electrostatic event. Fault conditions may be detected by receiving information by the co-processing unit indicative of a fault condition, or by checking at least one memory location associated with processing unit to determine if information stored therein indicates a fault condition. The co-processing unit returns the processing unit to a known, workable state by using the stored user context information to restore the pre-fault detection state information to the memory locations associated with the processing unit.
    • 系统的处理单元检测与协处理单元相关联的故障状况,并且在检测时,使用存储的用户上下文信息恢复处理单元。 在正常操作期间,用于执行操作命令的用户上下文信息由协处理单元存储在存储器中并在故障检测之后维护。 当处理单元的至少一部分由于放电静电事件而变得不可操作时,检测到故障状况。 可以通过由协处理单元接收指示故障状况的信息或者通过检查与处理单元相关联的至少一个存储位置来确定其中存储的信息是否指示故障状况来检测故障状况。 协处理单元通过使用存储的用户上下文信息将处理单元返回到已知的可操作状态,以将故障前检测状态信息恢复到与处理单元相关联的存储器位置。
    • 10. 发明申请
    • Method and apparatus for detecting a fault condition and restoration thereafter using user context information
    • 用于使用用户上下文信息检测故障状况和恢复的方法和装置
    • US20070168722A1
    • 2007-07-19
    • US11319926
    • 2005-12-28
    • Adrian de AlmeidaMohammad-Reza AhmadiIvan YangHongtao Yan
    • Adrian de AlmeidaMohammad-Reza AhmadiIvan YangHongtao Yan
    • G06F11/00
    • G06F11/1441
    • A processing unit of a system detects a fault condition associated with the co-processing unit and, upon detection, restores the processing unit using stored user context information. During normal operation, user context information used to execute operation commands are stored by the co-processing unit in memory and maintained after fault detection. A fault condition is detected when at least a portion of the processing unit is rendered non-operational due to a discharging electrostatic event. Fault conditions may be detected by receiving information by the co-processing unit indicative of a fault condition, or by checking at least one memory location associated with processing unit to determine if information stored therein indicates a fault condition. The co-processing unit returns the processing unit to a known, workable state by using the stored user context information to restore the pre-fault detection state information to the memory locations associated with the processing unit.
    • 系统的处理单元检测与协处理单元相关联的故障状况,并且在检测时,使用存储的用户上下文信息恢复处理单元。 在正常操作期间,用于执行操作命令的用户上下文信息由协处理单元存储在存储器中并在故障检测之后维护。 当处理单元的至少一部分由于放电静电事件而变得不可操作时,检测到故障状况。 可以通过由协处理单元接收指示故障状况的信息或者通过检查与处理单元相关联的至少一个存储位置来确定其中存储的信息是否指示故障状况来检测故障状况。 协处理单元通过使用存储的用户上下文信息将处理单元返回到已知的可操作状态,以将故障前检测状态信息恢复到与处理单元相关联的存储器位置。