Known Plaintext Attack Analysis

[Akshat1806]

Known Plaintext Attack (KPA) Analysis

Objective

Analyze the resistance of the Prime Cipher (PC) against Known Plaintext Attacks (KPA).

The reviewer is encouraged to determine whether:

• deterministic structures can be isolated
• affine parameters can be recovered
• transposition layers can be separated
• pivot chaining leaks information

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Suggested Areas of Investigation

• Frequency analysis
• Plaintext-ciphertext alignment
• Structural pattern leakage
• Deterministic parameter recovery
• Padding removability
• Repeat transformation reversibility

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Available Resources

• Full source code
• Cipher specification (PAPER.md)
• KPA datasets (REVIEW_PACK.md)

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Questions

1. Can affine structure be isolated?
2. Does pivot chaining significantly improve diffusion?
3. Can transposition layers be reversed independently?
4. Can grouping behavior be inferred statistically?
5. Does deterministic structure leak exploitable information?

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Deliverables

Please include:

• methodology
• observations
• weaknesses discovered
• proof-of-concept attacks (if any)
• recommendations for improvement

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Notes

This project is experimental and intended for:

• research
• education
• adversarial testing
• cryptanalysis practice