A dab of rabble

Doors lock. I fastkey twelve digits and thermal sealant fuses the bolts. Only one way out of here now. Two sirens and three failsafes kick in, but I’m a step ahead of them, bypass all subroutines. My krack wears away at the toughest crypt, getting closer, derandomizing keys, factoring primes. Seven minutes til dayshift starts and keys reset again, but the krack doesn’t need that long. On success, I let all the sirens go, the failsafes, concrete shielding, chemical and physical coolants, evac, killzones. Half-life of 87.7 years. Hold one channel open; as my body shuts down, my upload begins.