Connecting up to 32 Devices I2C
Really short: I²C with a bus multiplexer; this is a common problem and it's solved with a bus multiplexer.

However, seriously, the point of having a root of trust is having one root of trust, not 32; hence, your project requirements make me suspect you're either building a test rig for these devices, or you're testing a device that is supposed to work with one of these devices, or you've misunderstood your project requirements.