6. - 12.11.2023
This week I started implementing basic functionality of Kyber. I ended up writing keypair generation, encryption and decryption functions of CPAPKE section of the official specification. What I didn't implement yet is conversion between polynomial matrices and byte arrays, so ciphertext and other outputs are temporarily just numpy arrays instead of data. An example usage is included in main.py and usage guide is now available.
- Monday 6.11. Started implementing keypair generation 2h
- Tuesday 7.11. Implemented encryption 2h
- Thursday 9.11. Implemented decryption. Shared secrets do not match, so there must be an error somewhere in en/decryption functions. 2h
- Friday 10.11. Found and fixed the error. Implementation is now functioning. 1h
- Saturday 11.11. Improved code quality. Added documentation, invoke tasks, code coverage and linting. 2h
Total working time 9 hours.
What I discovered this week was that even the official specification is not always unequivocal. I improved at combining information – especially pseudocode – from multiple sources and debugging mathematically complex algorithm.