Access control for integrated circuit devices

    公开(公告)号:US11144634B2

    公开(公告)日:2021-10-12

    申请号:US15715316

    申请日:2017-09-26

    IPC分类号: G06F21/78 G06F21/50 G06F21/74

    摘要: Security systems for microelectronic devices physically lock the hardware itself and serve as a first line of defense by preventing overwriting, modification, maniplation or erasure of data stored in a device's memory. Implementations of the security systems can respond to lock/unlock commands that do not require signal or software interactivity with the functionality of the protected device, and which therefore may be consistent across devices. In various embodiments, a security device passively “listens” on data lines of the protected device and, when a lock or unlock command is received (typically in conjunction with a valid authentication code), the security device physically blocks or allows passage of signals to and from the protected device.