Multi-layered Encrypted Deterministic Interlocked Nested Architecture

A symmetric encryption construction that combines proven primitives (AES-256, SHA3-256, HKDF) in a novel architecture. Not a new algorithm — a new way of composing existing ones.

Matryoshka Chains — Sequential nested AES-256-CBC layers. Each layer's key derives from the previous. Enforces sequential execution — no parallelism possible regardless of computational resources.

Blind Souk Routing — Binary path through a SHA3-256 hash graph with zero intermediate feedback. Removes oracle feedback that search algorithms rely on, forcing full-path completion before verification.

Combined: an attacker has no parallelism advantage and minimal search advantage.

pip install -r requirements.txt

from engine.medina import encrypt, decrypt
import os
master_key = os.urandom(32) # 256-bit random key
path_key = "01101001" * 32 # 256-bit binary path
message = b"your secret message"
blob = encrypt(message, master_key, path_key, layers=64)
plaintext = decrypt(blob, master_key, path_key)

python -m engine.benchmark

Two encrypted files. Full source code is public. Can you crack them?

Challenge #1 is deliberately weak — designed to be broken. The Forever File uses full-strength MEDINA with 256-bit true random keys. Brute force is computationally infeasible with any known algorithm.

Download the .bin files from website/ or challenge/. Run verify.py to check your answer.

medina/
 engine/
 matryoshka.py # Pillar 1: Sequential nested encryption
 blind_souk.py # Pillar 2: Oracle-free hash maze
 medina.py # Combined MEDINA format (V2: entangled keys + HMAC)
 challenge.py # Challenge file generator
 benchmark.py # Performance benchmarks
 challenge/
 MEDINA_CHALLENGE.bin # Challenge #1 (crackable)
 MEDINA_QUANTUM_CHALLENGE.bin # The Forever File
 verify.py # Verify Challenge #1
 verify_quantum.py # Verify Forever File
 website/ # Static website
 CONCEPT.md # Full algorithm specification
 LICENSE.md # MEDINA Open Audit License (MOAL v1.0)
 requirements.txt

MEDINA Open Audit License (MOAL v1.0) — Read it. Attack it. Publish your findings. But don't copy the code or ship it commercially without permission. See LICENSE.md.

The ancient walled cities of Morocco — where the souks are labyrinths by design, where every alley looks the same to outsiders, and where the only way through is to know the path.

A tribute to Marrakech, the Red City. Founded 1070. Almost a millennium of walls that still stand.

And to Muhammad ibn Musa al-Khwarizmi — the man whose name became the word algorithm.