Story code: ST-001347
Part 2: The Ledger of Overrides
Dr. Thorne leaned over the counter, his eyes scanning the glowing terminal screen as the security logs refreshed. Leo crossed his arms, his chin tilted up, though he shifted his weight from one foot to the other as the silence stretched.
“Let’s look at the actual log files,” I said, pointing to the columns of encrypted hashes and timestamps. “These records are managed by the hardware security module. They cannot be edited or retroactively changed by anyone, including me.”
The screen displayed a long column of red warning flags next to Leo’s user ID.
“Over the last two weeks, there have been twenty-seven separate failed authentication attempts on Leo’s account,” I explained, scrolling through the list. “Every single one of them occurred between two and four in the morning, originating from an external IP address linked to his personal laptop. Each time, the system registered an invalid PIN entry.”
Leo opened his mouth to speak, but Dr. Thorne held up a hand to quiet him, keeping his focus on the screen. “And what about the manual overrides, Sarah? He says you’ve been locking him out.”
“Look at the green entries immediately following the red ones,” I said. I highlighted the digital signatures. “Every time Leo locked himself out by typing the wrong PIN, I received an automated alert on my phone. Instead of letting his simulation fail, I manually signed off on a temporary bypass token from my administrator account. I did it fourteen times this month alone, often at three in the morning, just so his work wouldn’t be interrupted.”
The logs clearly showed my administrator ID authorizing the bypasses, keeping his data stream active despite his constant authentication errors.
Leo’s face flushed. He took a step back from the desk, his eyes darting toward the lobby doors. “That doesn’t prove anything. The physical token is still missing. You could have easily taken it from my desk to stop me from logging in physically today.”
“I didn’t take your token, Leo,” I said.
“Then why can’t I access the elevator?” Leo demanded, his voice rising again. “You’re the system admin. If you didn’t disable it, who did?”
I scrolled down to the very bottom of the real-time access log, where the live security events were streaming onto the monitor. My eyes stopped on the latest line of text, which had registered just minutes before Leo started shouting at me. The entry showed a successful hardware scan that shouldn’t have been possible. I pointed to the flashing blue indicator at the bottom of the screen. “The system logs show that your token is currently in use. In fact, it was swiped at the secondary cleanroom terminal less than five minutes ago, while we were standing right here.”
Dr. Thorne slowly turned his head to look at Leo. Leo’s defensive stance instantly stiffened, his fingers clenching at his sides. “That’s impossible,” Leo stammered, though he didn’t look at the screen. “Someone else must have taken it. Someone else is using my credentials.”
“Only your biometric thumbprint can activate that specific token when it’s plugged into a cleanroom terminal,” I said. “The system requires it for every physical login.”
The silence that followed was heavy, broken only by the quiet hum of the lobby’s air conditioning.