ChaCha20
What It Is
Bernstein's ChaCha20 stream cipher (2008) --- cryptographic-strength PRNG, the keystream of TLS 1.3 / QUIC / WireGuard. Detection-ceiling source: the framework should find ChaCha20 keystream geometrically indistinguishable from White Noise --- a stronger null than MT19937 (cryptographic vs statistical PRNG)
Interpretation
Standard analysis sees: rich, high-entropy values; aperiodic / broadband; high-complexity (noise-like); homoskedastic; monofractal; high-dimensional / space-filling. The atlas detects no named structure beyond this. It sits beside Wichmann-Hill in the atlas (standard-bank rank 20) — a neighbor conventional features miss.
Nothing beyond the standard reading — this source’s structure is already captured by standard features; the atlas adds no named residual.
Composition
Render Gallery
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Atlas Position
| Nearest neighbor | Distance | |
|---|---|---|
| glibc LCG | 1.58 | |
| BSL Residues | 1.61 | cross-origin |
| Wichmann-Hill | 1.66 |
Which Geometries Light Up
Attractor Reconstruction › Attractor Reconstruction:filling_ratio | rank 3/307 | 0.9829 |
Cantor Set › Cantor Set:jump_entropy | rank 303/307 | 0.0556 |
Catch24 › Catch24:SB_TransitionMatrix_3ac_sumdiagcov | rank 305/307 | 0.0000 |
D4 Triality › D4 Triality:gram_consistency | rank 2/307 | 2.5026 |
Modular Residue › Modular Residue:equidistribution_deviation | rank 307/307 | 0.0016 |
Predictability › Predictability:cond_entropy_k1 | rank 4/307 | 2.9976 |