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Course information

• Location: Room 2104
• Instructor: Runzhi Zeng
• Email: runzhi.zeng@uni-kassel.de
• Office Hours:
  • Room 2628, FB16
  • 3:15 pm – 3:45 pm, Wednesday
• Grading: 40% homework + 60% final exam
• Example code can be found in here.

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Schedule and Resources

Week	Date	Topic	Notes/Code
Lecture 1	Oct 22, 2025	Introduction, symmetric primitives	Slides
Lecture 2	Oct 29, 2025	DHKE, MitM attacks, Digital signature	Slides
Lecture 3	Nov 05, 2025	Signed Diffie-Hellman, TLS handshake	Slides
Lecture 4	Nov 12, 2025	KEM, Hashed ElGamal, DHIES	Slides
Lecture 5	Nov 19, 2025	CCA security and Fujisaki-Okamoto Transform	Slides
Lecture 6	Nov 26, 2025	PQTLS, KEMTLS	Slides
Lecture 7	Dec 03, 2025	X3DH, Symmetric Ratchet	Slides
Lecture 8	Dec 10, 2025	Double Ratchet	Slides
Lecture 9	Dec 17, 2025	Remarks on Homework	Slides
Lecture 10	Jan 14, 2026	Password Security - 1	Slides
Lecture 11	Jan 21, 2026	Password Security - 2	Slides
Lecture 12	Jan 28, 2026	Hash functions in Blockchain	Slides
Lecture 13	Feb 04, 2026	Toward post-quantum cryptography	Slides

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Homework

• Eligibility for the Final Exam: Students must complete at least 60% of the homework.
• Homework accounts for 40% of the final grade.
  

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Final Exam

Format: Final Project + Report + Oral Exam:

1. Choose one of the two final projects and begin coding (the topics of the two projects will be introduced later).
2. Submit a simple report: Choose 3-6 functions that you think are the best in your program and present them in your report, including What it does, How it works, and Why it works correctly (2-4 pages, no introduction).

Deadline for the report: TBD

Date of the oral exam: March 27th, 2026

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