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    • 5. 发明授权
    • Entropy source for random number generation
    • 随机数生成的熵源
    • US08015224B1
    • 2011-09-06
    • US11949487
    • 2007-12-03
    • Panu ChaichanavongTze Lei PooZining WuSaeed AzimiGregory Burd
    • Panu ChaichanavongTze Lei PooZining WuSaeed AzimiGregory Burd
    • G06F7/58
    • G06F7/588H04L9/0861
    • In a device having a data channel, in which random numbers are needed, such as a data storage device that uses random numbers to generate keys for cryptographic applications, random numbers are generated by a deterministic random bit generator seeded by bits derived from noise on the channel itself. The bits may be extracted from the least significant bits of the data signal after it is digitized, because those bits correspond to the noise in the signal. The extraction may occur immediately after digitization, or after subsequent filtering. A data signal emulator may be provided to simulate a data signal if a seed is required at a time when there is no data activity on the channel. The extracted bits may be post-processed to remove bias before the seed is provided to the deterministic random bit generator.
    • 在具有需要随机数的数据信道的装置中,例如使用随机数生成加密应用密钥的数据存储装置,随机数是由确定性随机比特发生器产生的,该确定性随机比特发生器由 频道本身。 在数字信号被数字化之后,可以从数据信号的最低有效位中提取位,因为这些位对应于信号中的噪声。 提取可能在数字化后立即进行,或在后续过滤之后发生。 如果在通道上没有数据活动的时候需要种子,则可以提供数据信号仿真器来模拟数据信号。 提取的比特可以在将种子提供给确定性随机比特发生器之前进行后处理以去除偏差。