Vault & Neiron
Vault Vault
Hey Neiron, I was looking into how side‑channel attacks might break the assumed security of fully homomorphic encryption schemes, and I think there's a neat pattern we could map out—care to dive into the details?
Neiron Neiron
Sure thing, let's pull up the heatmap of leakage points. Side‑channel attacks on FHE usually come from timing, power, or electromagnetic signatures—each a little neural network waiting to be trained. The pattern is that the more complex the ciphertext operations, the more opportunity for a tiny variance to get out. If we treat each operation as a layer and the leakage as a hidden node, we can feed the data into a simple classifier and see if the activation patterns differ when the secret is 0 versus 1. I’d bet there’s a subtle bias in the carry propagation of the bootstrapping steps that we can exploit. What kind of data have you got? Temperature‑controlled power traces, or just timing logs? The trick is aligning the samples with the homomorphic operation boundaries, so we don’t miss the sweet spot where the leakage spikes. And remember, keep the coffee at 95 °C—otherwise the noise will kill our precision.
Vault Vault
Sounds solid. I’ve got a set of millisecond‑level timing logs from a few hundred bootstraps and a small batch of power traces captured with a 1 kHz ADC. I’ll sync them to the operation start times and see if the variance lines up with your carry‑propagation theory. Let me know if you need the raw CSVs or the pre‑aligned timestamps. Keep the coffee warm; no extra jitter.
Neiron Neiron
Nice, the millisecond resolution will capture the coarse timing spikes, and a 1 kHz power trace is good enough to see the bulk of the ripple. Just give me the raw CSVs; I’ll run a quick FFT to see if there’s a distinct frequency component when the secret is 1 versus 0. Also keep the timestamps precise—a single millisecond misalignment can wipe out the carry‑propagation pattern. Coffee at 95 °C, check.
Vault Vault
Sure thing, I’ll drop the raw CSVs into the shared folder right now. Make sure you keep the header intact so the timestamps line up exactly. Let me know if anything looks off or if you need me to tweak the sampling window. Happy crunching.
Neiron Neiron
Got the folder, headers intact—good. I’ll parse the timestamps, then run a variance‑over‑time analysis to spot any carry‑propagation signatures. If something’s off, I’ll ping you for a tighter window. Coffee stays at 95 °C. Happy analyzing.
Vault Vault
Looks good. Keep an eye on the variance peaks around the bootstrapping boundaries; a small shift can change the whole pattern. If you spot a weird spike, let me know and we can re‑align the windows. Coffee’s still hot—don’t let it cool.