live-casi

live-casi is a Python toolkit for Causal Amplification Security Index (CASI) analysis of byte streams, lightweight-cipher outputs, post-quantum artifacts, and related structural-integrity signals.

This repository also carries the reproducibility artifact for the IEEE NANO 2026 camera-ready paper:

Compression-Based Trust Verification of Lightweight Ciphers Deployed in Nano-IoT Communication Standards

Install

pip install live-casi

Optional extras:

pip install "live-casi[network]"   # pcap/network analysis
pip install "live-casi[causal]"    # causal graph export
pip install "live-casi[pqc]"       # post-quantum experiments
pip install "live-casi[academia]"  # text/PDF structural analysis
pip install "live-casi[all]"       # all optional dependencies

Nano-CASI IEEE NANO 2026 Artifact

Version 1.0.1 includes the Nano-CASI camera-ready artifact under:

live_casi/artifacts/nano_casi_ieee_nano_2026/

The artifact contains:

• tables/full_coverage_matrix.csv: full 41-cipher camera-ready matrix.
• tables/representative_table.csv: compact table used for paper reporting.
• raw_data/: full per-cipher sweeps grouped by family.
• results/: reduced-round, sample-sensitivity, aging, and sanitized master summaries.
• figures/: camera-ready figure source images.

Programmatic access after installation:

from live_casi import nano_casi_artifact_path

artifact = nano_casi_artifact_path()
matrix = artifact / "tables" / "full_coverage_matrix.csv"
print(matrix)

The Speck rows use the camera-ready verdict F8-DIST: a full-round cross-round statistical distinguisher under the F8 experiment, not a key recovery result and not a practical chosen-plaintext or ciphertext-only exploit.

Core Usage

import os
from live_casi import LiveCASI

engine = LiveCASI(key_size=32, window_keys=10_000)
engine.feed(os.urandom(320_000))
engine.force_update()

print(engine.current_casi)
print(engine.current_verdict)

Command line:

cat ciphertext.bin | live-casi
live-casi --file ciphertext.bin
live-casi --test

Main Modules

Development

python -m pip install -e ".[all]"
python -m pytest tests/test_casi.py
python -m build

Citation

If you use the Nano-CASI artifact, cite:

David Tom Foss, "Compression-Based Trust Verification of Lightweight Ciphers
Deployed in Nano-IoT Communication Standards," IEEE NANO, 2026.

License

MIT