Method for realizing high-speed cryptographic operation of vehicle-mounted communication gateway based on double SPI concurrency

• Main Author: HE JIAZHEN
• Format: Patent
• Language: Chinese; English
• Published: 30.04.2021
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; PHYSICS; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

The invention relates to a method for realizing high-speed cryptographic operation of a vehicle-mounted communication gateway based on double SPI concurrency. The method comprises the steps that an upper computer generates a request message, selects one SPI interface in a polling mode, and locks the selected SPI interface through a channel lock; the upper computer checks the state information of the encryption chip, and sends the request message to the encryption chip when the state information is a preset value; the encryption chip receives the request message and performs password calculation according to the request message to obtain a result message; the upper computer checks the state information of the encryption chip, receives a result message sent by the encryption chip when the state information is a preset value, and closes a channel lock of the selected SPI interface; and the upper computer analyzes the result message to obtain an operation result. By adopting the method, the design requirement of