The invention relates to the technical field of
chip data analysis, in particular to a commercial
password capability detection method and
system for an
FPGA chip, and the method comprises the following steps: carrying out the
statistical processing of the collected random data based on the random data collected in real time in a secret
key generation process, calculating the entropy value of an information bit according to the probability distribution, and generating an entropy value distribution result. According to the method,
statistical processing and probability distribution analysis are carried out through random
voltage fluctuation,
clock jitter, thermal
noise and other data which are collected in real time, real-time safety protection in a commercial
password environment is further achieved by dynamically adjusting the entropy value and the
insertion frequency and position of an interference
signal, and the real-time safety protection of the commercial
password environment is achieved by detecting the entropy value fluctuation characteristic in a specified time period.
Insertion parameters of potential interference signals can be effectively identified, and key
signal characteristics such as
power consumption and
electromagnetic radiation are covered by optimizing the intensity and
time sequence distribution of the interference signals, so that information in a commercial secret operation period is more difficult to obtain through side
channel analysis.