摘要:
Securing an integrated circuit, including fabricating the integrated circuit to include a multiplicity of unblown efuses, at least one surrogate efuse that emulates a blown efuse, non-volatile data representing the blown state of the surrogate efuse, and security circuitry; and setting, by the security circuitry when power is first applied to the integrated circuit, a security state of the integrated circuit in dependence upon whether a sensed state of the surrogate efuse is equal to the blown state of the surrogate efuse.
摘要:
A monitor bank consists of test one time programmable memory that is programmed distinctively from functional one time programmable memory in order to determine whether the functional one time programmable memory has or will program successfully. In a specific embodiment, each monitor bank consists of a first eFuse configured to expectedly never blow, a second eFuse configured to expectedly always blow, and at least a third eFuse configured to be more difficult to blow than the first eFuse, but easier to blow than the second eFuse. The method of determining whether functional eFuses have or will be programmed successfully is described: programming a monitor bank; sensing whether the test eFuses have blown; creating a monitor bank bit line blow pattern; determining an anticipated bit line blow pattern; comparing the two patterns; and determining that the functional eFuses will not blow successfully if the patterns do not match.
摘要:
Securing an integrated circuit, including fabricating the integrated circuit so that the integrated circuit includes at least one efuse that is intended to be always blown during operation of the integrated circuit and the integrated circuit includes security circuitry capable of blowing the efuse and of performing other security related functions; blowing, by the security circuitry of the integrated circuit, the efuse when power is applied to the integrated circuit and prior to performing any other security related functions; and setting, by the security circuitry after blowing the efuse, a security state of the integrated circuit in dependence upon a sensed state of the efuse.
摘要:
Securing an integrated circuit, including fabricating the integrated circuit so that the integrated circuit includes at least one efuse that is intended to be always blown during operation of the integrated circuit and the integrated circuit includes security circuitry capable of blowing the efuse and of performing other security related functions; blowing, by the security circuitry of the integrated circuit, the efuse when power is applied to the integrated circuit and prior to performing any other security related functions; and setting, by the security circuitry after blowing the efuse, a security state of the integrated circuit in dependence upon a sensed state of the efuse.
摘要:
A monitor bank consists of test one time programmable memory that is programmed distinctively from functional one time programmable memory in order to determine whether the functional one time programmable memory has or will program successfully. In a specific embodiment, each monitor bank consists of a first eFuse configured to expectedly never blow, a second eFuse configured to expectedly always blow, and at least a third eFuse configured to be more difficult to blow than the first eFuse, but easier to blow than the second eFuse. The method of determining whether functional eFuses have or will be programmed successfully is described: programming a monitor bank; sensing whether the test eFuses have blown; creating a monitor bank bit line blow pattern; determining an anticipated bit line blow pattern; comparing the two patterns; and determining that the functional eFuses will not blow successfully if the patterns do not match.
摘要:
A security tag adapted for use with a radiofrequency identification (RFID) system, includes: circuitry for at least one of transmitting and receiving an RFID signal, at least one one-time-programmable-read-only-memory (OTPROM) and at least one fuse (eFUSE) coupled to the OTPROM; wherein the circuitry is adapted for communication with the OTPROM and providing instructions for at least one of selectively reading the at least one fuse and selectively blowing the at least one fuse.