**Name : **Muhamad Zaki Riyanto, S.Si., M.Sc.

**Gender: **Male

**E-mail: ** zakimath[at]gmail.com and zaki.riyanto[at]uin-suka.ac.id

**Institution: **Department of Mathematics, Faculty of
Science and Technology, Universitas Islam Negeri Sunan Kalijaga,
Yogyakarta, Indonesia. Address: Jl. Marsda Adisucipto No.1 Yogyakarta, Indonesia

**Research Interest :** Group Theory, Finite Field,
Algebraic Geometry, Groebner Basis, Public-Key Cryptography,
Key-Exchange Protocols, Group-Based Cryptography, Non-Commutative
Cryptography

**Memberships of Professional Organizations :**

- Indonesian Mathematical Society (IndoMS)
- Komunitas Peminat Aljabar (KPA) Indonesia (Indonesian Algebraist Society)
- Asosiasi Dosen dan Program Studi Matematika dan Program Pendidikan Matematika PTKIN (ADMAPETA)

**Educations :**

- Master of Science, graduated in 2011 from the Department of
Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia. Title of
the research: "Penyelesaian Sistem Persamaan Polinomial Menggunakan
Teknik Basis Groebner dan Penerapannya dalam Kriptanalisis" (
*Solving System of Polynomial Equations with Groebner Basis Technique and Its Applications in Cryptanalysis*). - Bachelor of Science, graduated in 2008 from the Department of
Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia. Title of
the research: "Pengamanan Pesan Rahasia Menggunakan Algoritma Kriptografi ElGamal atas Grup Pergandaan Zp*"(
*Securing Secret Messages using ElGamal Cryptography Algorithm over Multiplicative Group Zp**).

**Invited Speaker / Guest Lecturer / Oral Presentation:
**

- Oral presentation in the parallel session of the Seminar Nasional Matematika III UNUD 2019 at Universitas Udayana, Denpasar Bali, Indonesia with title "Autentikasi Identitas Digital Menggunakan Grup Matriks atas Ring Komutatif", October 11, 2019.
- Oral presentation in the parallel session of the Seminar Nasional Integrasi Matematika dan Nilai Islam (SI MaNIs 2019) at UIN Maulana Malik Ibrahim Malang Jawa Timur, Indonesia, with title "Kode Linear Untuk Deteksi dan Koreksi Kesalahan Penulisan dalam Huruf Hijaiyah", September 21, 2019.
- Oral presentation in the parallel session of the Seminar Nasional dan Workshop Aljabar 2018 at Universitas Andalas Padang Sumatera Barat, Indonesia with title "Protokol Autentikasi Berdasarkan Masalah Dekomposisi Atas Suatu Ring Endomorfisma", November 8-9, 2018.
- Guest Lecturer at the Department of Mathematics Education, Universitas Negeri Yogyakarta, Indonesia with title: "Mengenal Kriptografi: Ilmu Pengamanan Informasi Rahasia Berbasis Matematika", February 19, 2018.
- Invited speaker of the 8th Algebra Joint Seminar at Universitas Islam Negeri (UIN) Sunan Kalijaga Yogyakarta, Indonesia, with the title: "Protokol Pertukaran Kunci Berdasarkan Masalah Konjugasi Pada Grup Matriks atas Ring" (Key-Exchange Protocol Based on The Conjugation Problem over a Matrix Group over a Ring), November 28, 2017.
- Guest Lecturer at the Department of Mathematics, Universitas Gadjah Mada Yogyakarta, Indonesia with title: "Algebraic Structures in Cryptography", November 27, 2017.
- Oral presentation in the parallel session of the Graduate Student Conference 2017 at National Institute of Education, Nanyang Technological University in Singapore with the title: "Cryptanalysis of a Multivariate Cryptography using a Groebner Basis Technique", October 27-28, 2017.
- Invited speaker of the 4th Algebra Joint Seminar at Universitas Gadjah Mada Yogyakarta, Indonesia, with the title: "Peranan Teori Grup dan Ring Pada Perkembangan Kriptografi Kunci Publik" (Applications of Group and Ring Theory in The Development of Public-Key Cryptography), April 17, 2017.
- Guest Lecturer at the Department of Mathematics, Universitas Islam Negeri (UIN) Walisongo Semarang, Central Java, Indonesia, with title: "Mengenal Kriptografi: Ilmu Menjaga Pesan Rahasia Berbasis Matematika", February 23, 2017.
- Oral presentation in the parallel session of the National Seminar on Algebra (Seminar Nasional Aljabar) 2016 at Universitas Sanata Dharma Yogyakarta, Indonesia with the title: "Protokol Autentikasi Berdasarkan Masalah Konjugasi Pada Grup Unit atas Ring Endomorfisma End(Zp x Zp^2)" (Authentication Protocol Based on The Conjugation Problem in a Unit Group over The Ring of Endomorphisms End(Zp x Zp^2)), September 16-17, 2016.

**Workshops and Short Courses Participation:
**

- Participant of The Seminar and Workshop with title "Peningkatan Kemampuan Deteksi Dini dan Koordinasi Dalam Rangka Cyber Situational Awareness" at Telkom University Bandung Jawa Barat, Indonesia, organized by Tel-U, Badan Siber dan Sandi Negara (BSSN) and Indonesia Honeynet Project, November 12-13, 2019.
- Participant of The Workshop on Maxima: A Computer Algebra System by Prof. Jose Antonio Vallejo at Universitas Negeri Yogyakarta, Indonesia, October 2-3, 2019.
- Participant of The SEAMS-UGM-ITB Summer Course on Coding Theory and Cryptography at Universitas Gadjah Mada Yogyakarta, Indonesia, July 15-26, 2019.
- Participant of The Workshop on "de Bruijn Sequences and Their Variants" at Universitas Sanata Dharma Yogyakarta, Indonesia, July 2-5, 2018.
- Participant of The Workshop on Cryptography and Coding Theory (Quantum Codes and Post-Quantum Cryptography), Universitas Gadjah Mada Yogyakarta, Indonesia, March 12-16, 2018.
- Participant of The IACR-SEAMS School on Cryptography: Foundations and New Directions, held at Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi University of Science and Technology, Hanoi, Vietnam, November 27 - December 4, 2016.
- Participant of The CIMPA-ICTP Research School on Lattices and Applications to Cryptography and Coding Theory, Saigon University, Ho Chi Minh City, Vietnam, August 1-12, 2016.
- Participant of The DAAD Spring School on Combinatorial Stochastic Processes, held at Vietnam Institute for Advanced Study in Mathematics (VIASM), Hanoi University of Science and Technology, Hanoi, Vietnam, March 7-18, 2016.
- Participant of The SEAMS School on Algebras and Their Applications (Quantum Physics, Cryptography and Statistics), INSPEM Universiti Putra Malaysia (UPM), Malaysia, November 3-10, 2015.
- Participant of The SEAMS School on Number Theory and Applications in Cryptography and Coding Theory, University of Science, Ho Chi Minh City , Vietnam, August 31-September 8, 2015.
- Participant of The SEAMS School on Module Theory and Its Applications, Institut Teknologi Bandung, Indonesia, November 10 - 18, 2014.
- Participant of The SEAMS School on Numbers, Matrices and Graphs, Institut Teknologi Bandung, Indonesia, November 4-16, 2013.
- Participant of The CIMPA School on Linear Computational Geometry, Universitas Gadjah Mada, Yogyakarta, Indonesia, July 18-29, 2011.
- Participant of The Workshop on Algebra: "Leavitt and Path Algebra" by Prof. Gonzalo Aranda Pino from University of Malaga, Spain. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, February 12, 2010.
- Participant of The Workshop on Mathematical Biology by Prof. Dr. Elisabeth Pecou from Universite de Nice Sophia-Antipolis, France. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, January 25, 2010.
- Participant of The Workshop on Analysis: "Integration Theory" by Prof. D.K. Ganguly from Calcuta, India. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, October 14, 2009.
- Participant of The Workshop on Algebra: "F-Coalgebra and State-based System" by Prof. Klaus Denecke from Postdam University, Germany. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, October 5-9, 2009.
- Participant of The Research Workshop on Algebra and Discussion on Undergraduate and Graduate Algebra Courses Content. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, August 8-9, 2009.
- Participant of The Workshop and Stadium Generale on Applied Analysis by Prof. Ang Keng Chen from Nanyang Technology University, Singapore. Held at The Department of Mathematics, Universitas Gadjah Mada, Yogyakarta, Indonesia, July 14-16, 2009.
- Participant of The Workshop on Algebra-Analysis: "Homotopy Groups of Complements of Complex Hyperplane Arrangements" and "Witt Formula and Braid Groups" by Prof. Michael Jambu from CIMPA, France. Held in Universitas Gadjah Mada, Yogyakarta, Indonesia, February 12, 2009.

**Focus Group Discussions :**

- Participant of The Discussion on Cryptography and Information Security, organized by Lembaga Sandi Negara (National Crypto Agency), Jakarta, Indonesia, July 2, 2009.
- Participant of The Discussion on Cryptography and Information Security, organized by Lembaga Sandi Negara (National Crypto Agency), Jakarta, Indonesia, November 18, 2008.
- Participant of The Discussion on Algebra and Its Application Research Collaboration. Organized by Indonesian Algebraist Society, in Universitas Gadjah Mada, Yogyakarta, Indonesia, July 24, 2007.

**Seminars :**

- Participant of The Algebra Joint Seminar on "Prime Radical and Upper Radical in Ring Theory" at UIN Sunan Kalijaga Yogyakarta, Indonesia, February 14, 2017.
- Participant of The Algebra Joint Seminar on "Sub-Injectivity Domains" at Universitas Negeri Yogyakarta, Indonesia, January 18, 2017.
- Participant ot The Algebra Seminar, organized by Institut Teknologi Bandung and Universiti Teknologi Malaysia. Held in Institut Teknologi Bandung, Indonesia, November 30, 2013.