Notes on the mathematics and engineering behind our work.
Our CVC 2026 paper with Jintai Ding, published by Springer: a stencil cipher read by a camera, layered over MHKC, where a successful lattice attack still leaves the message hidden among random letters.
By Chandragupt Sharma. A rank-23 scheme with 139 nonzero coefficients, tying Smirnov's 2013 record, and exhaustive checks showing that no local change to it, or to any known scheme at 140 or 141, reaches 138.
Signed slides from our JMM talk on the k-ball egg-drop puzzle: the recurrence P(m,k) = 1 + P(m-1,k) + P(m-1,k-1), its binomial solution, and where the count applies.
How a 2004 analysis of the k-ball egg-drop puzzle located a hidden step budget in twelve probes, and how every machine we submitted was proved in Lean to halt at its exact step count.