README.md

Prime Cipher (PC)

Experimental deterministic hybrid cryptographic system designed by Akshat Dhabalia.

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⚠️ Disclaimer

This cipher is experimental.

It has:

• NOT been formally peer-reviewed
• NOT been mathematically proven secure
• NOT been tested against advanced modern cryptanalysis

DO NOT use this system for:

• banking
• passwords
• confidential communications
• production encryption

Intended only for:

• cryptography learning
• experimentation
• CTF challenges
• adversarial testing
• educational research

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Overview

The Prime Cipher (PC) is a deterministic master-key driven hybrid encryption architecture combining:

• Printable ASCII substitution
• Case-sensitive dual grouping
• Stateful pivot chaining
• Prime-based transformations
• Affine encryption
• Double Myszkowski transposition
• Double Columnar transposition
• Adaptive multi-layer padding

The system operates over the full printable ASCII range (ASCII 32–126).

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Features

• Full printable ASCII support
• Deterministic master-key architecture
• Cross-word pivot chaining
• Case-sensitive indexing
• Variable-length transposition keys
• Global and local scrambling
• Multi-stage padding system
• Stateful encryption flow

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Encryption Pipeline

1. Split plaintext into words
2. Pre-padding for small words
3. Pivot transformation
4. Pivot chaining
5. Repeat transformation
6. Affine transformation
7. Double Myszkowski transposition
8. Double Columnar transposition
9. Final padding

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Inputs

The system requires:

• Plaintext
• MASTER_KEY
• PRIME_NUMBER
• THRESHOLD

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Example Usage

python cipher.py

Example:

Enter MASTER plaintext: Hello WORLD I am ChatGPT
Enter MASTER_KEY: AKSHAT2026
Enter PRIME_NUMBER: 101
Enter THRESHOLD: 5

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Repository Structure

Prime-Cipher/
│
├── README.md
├── PAPER.md
├── LICENSE
├── SECURITY.md
├── REVIEW_PACK.md
│
├── implementation/
│   └── cipher.py
│
└── examples/

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Intended Use Cases

Suitable for:

• cryptography learning
• experimental cipher design
• CTF systems
• adversarial analysis
• educational demonstrations

Not suitable for:

• production encryption
• financial systems
• military/security communications

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Peer Review

This repository is open for:

• cryptanalysis
• known plaintext attacks
• structural analysis
• entropy analysis
• differential analysis

Constructive criticism and attack attempts are encouraged.

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Known Limitations

• No formal security proof
• Limited avalanche effect
• Classical transposition layers
• No integrity/authentication mechanism
• Not resistant to modern nation-state cryptanalysis

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License

MIT License with attribution requirement.

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Author

Akshat Dhabalia 2026