摘要:
An LSI includes a first decryptor which receives first encrypted key data, and decrypts the first encrypted key data using a first cryptographic key, thereby generating first decrypted key data, a second cryptographic key generator which generates a second cryptographic key based on a second ID, a second encryptor which encrypts the first decrypted key data using the second cryptographic key, thereby generating second encrypted key data, and a second decryptor which decrypts the second encrypted key data using the second cryptographic key, thereby generating second decrypted key data. At a time of key setting, the second encryptor stores the second encrypted key data in a storage unit. At a time of key usage, the second decryptor reads the second encrypted key data from the storage unit.
摘要:
An LSI includes a first decryptor which receives first encrypted key data, and decrypts the first encrypted key data using a first cryptographic key, thereby generating first decrypted key data, a second cryptographic key generator which generates a second cryptographic key based on a second ID, a second encryptor which encrypts the first decrypted key data using the second cryptographic key, thereby generating second encrypted key data, and a second decryptor which decrypts the second encrypted key data using the second cryptographic key, thereby generating second decrypted key data. At a time of key setting, the second encryptor stores the second encrypted key data in a storage unit. At a time of key usage, the second decryptor reads the second encrypted key data from the storage unit.
摘要:
A PLA contains an input plane (10) including a plurality of data lines (103) and a plurality of product term lines (104) having voltage levels changed in accordance with signal input to the plurality of data lines; and an output plane (20) including a plurality of product term lines (204) having voltage levels changed in accordance with the change of the voltage levels of the plurality of product term lines of the input plane and a plurality of data lines (203) for outputting signals in accordance with the voltage levels of the plurality of product term lines. In this PLA, at least one of the data lines of at least one of the input plane and the output plane has data terminals (101) at both ends thereof.
摘要:
It is an object of the present invention to achieve a semiconductor device capable of preventing circuit malfunctions caused by noise without decreasing an integration degree of the circuit by making a space between signal interconnections wider and inserting a shield or a shield layer between the signal interconnections. The semiconductor device has a multilayer interconnection structure wherein three or more interconnection layers are stacked on a silicon semiconductor substrate, and comprises: a first signal line which is formed with a (N−1)-th interconnection layer and comprises a latch circuit; a second signal line which is formed with a (N+1)-th interconnection layer and is arranged so as to cross the first signal line or partially overlap thereover; and a power supply interconnection serving as a shield interconnection which is formed with an N-th interconnection layer in a portion directly beneath the first signal line and the second signal line.