Abstract:
A method of encoding and an encoder are provided. The method includes generating first one-hot bits for most significant bits (MSBs) and second one-hot bits for least significant bits (LSBs) using input one-hot bits; encoding the first one-hot bits to the MSBs and complementary MSBs through a first logical operation using a cross-connection; and encoding the second one-hot bits to the LSBs and complementary LSBs through a second logical operation using a cross-connection. The encoder includes a first bit generator, a first encoder, a second bit generator and a second encoder.
Abstract:
An electronic circuit includes an operator including logic gates configured to perform either one or both of encryption and decryption operations. The electronic circuit further includes a controller configured to control the operator to operate in a first mode in which each of the logic gates outputs a first logic value during a first time period of a clock signal, and operate in a second mode in which a number of first logic gates, each of which outputs the first logic value, among the logic gates, and a number of second logic gates, each of which outputs a second logic value, among the logic gates, are maintained constant during a second time period of the clock signal, in response to a control value indicating that either one or both of the encryption and decryption operations are performed.
Abstract:
A security device includes a secure processor, a mail box, a cryptographic intellectual property (IP), a secure direct memory access (DMA) circuit, and an internal memory. The secure processor provides an isolated execution environment. The mail box transfers a request from a CPU to the secure processor. The cryptographic IP performs one or more secure operations, including a signature certification operation, an encryption/decryption operation, and an integrity verification operation, on secure data within the isolated execution environment and without intervention of the CPU. The secure DMA circuit controls the one or more secure operations within the isolated execution environment, wherein only the secure processor is configured to control the secure DMA circuit. The internal memory stores the secure data on which the one or more secure operations are performed. The cryptographic IP includes a DMA circuit configured to control data access to an external storage.
Abstract:
Provided are an electronic system, an integrity verification device, and a method of performing an integrity verification operation. The electronic system includes: a memory device; a processor configured to provide a plurality of configuration records corresponding to a plurality of verification data stored in the memory device, each of the configuration records including a start address, a data length, and a reference hash value for a corresponding verification data; and an integrity verification device configured to: store the configuration records, select a configuration record, directly access the memory device to read verification data, corresponding to the selected configuration record, based on the start address and the data length included in the selected configuration record, perform a hash operation on the verification data to obtain a verification hash value, and output an interrupt signal based on the verification hash value and the reference hash value comprised in the selected configuration record.
Abstract:
A glitch detector, an electronic device including the glitch detector, and a method of generating an alarm signal are provided. The glitch detector includes a clock generator configured to generate a clock corresponding to a power voltage, a counter configured to count the clock generated by the clock generator and to output a count value, and a comparator configured to compare a reference value with the count value output by the counter and to generate an alarm signal based on a result of the comparison.
Abstract:
A system on chip includes a central processing unit and a key manager coupled to the central processing unit. The key manager includes a random number generator configured to generate a key and a key memory configured to store the key and a user setting value associated with the key.