公开(公告)号：US20170010864A1

公开(公告)日：2017-01-12

申请号：US14882255

申请日：2015-10-13

Applicant: QUALCOMM Incorporated

Inventor： David JACOBSON ,  Xiaochun ZHU ,  Wenqing WU ,  Kendrick Hoy Leong YUEN ,  Seung KANG

IPC: G06F7/58 ,  H03M7/30 ,  G06F5/01

CPC classification number: G06F7/588 ,  G06F5/01 ,  G06F2205/00 ,  G06F2207/581 ,  G11C11/1659 ,  G11C11/1673 ,  G11C11/1695 ,  G11C11/1697 ,  H03M7/30

Abstract: An entropy source and a random number (RN) generator are disclosed. In one aspect, a low-energy entropy source includes a magneto-resistive (MR) element and a sensing circuit. The MR element is applied a static current and has a variable resistance determined based on magnetization of the MR element. The sensing circuit senses the resistance of the MR element and provides random values based on the sensed resistance of the MR element. In another aspect, a RN generator includes an entropy source and a post-processing module. The entropy source includes at least one MR element and provides first random values based on the at least one MR element. The post-processing module receives and processes the first random values (e.g., based on a cryptographic hash function, an error detection code, a stream cipher algorithm, etc.) and provides second random values having improved randomness characteristics.

Abstract translation: 公开了熵源和随机数（RN）生成器。 一方面，低能量熵源包括磁阻（MR）元件和感测电路。 MR元件施加静态电流，并具有基于MR元件的磁化确定的可变电阻。 感测电路感测MR元件的电阻，并根据检测到的MR元件的电阻提供随机值。 另一方面，RN发生器包括熵源和后处理模块。 熵源包括至少一个MR元素，并且基于至少一个MR元素提供第一随机值。 后处理模块接收并处理第一随机值（例如，基于加密散列函数，错误检测码，流密码算法等）并提供具有改进的随机特性的第二随机值。