DAGS: Reloaded Revisiting Dyadic Key Encapsulation

• Published in: Code-Based Cryptography Vol. 11666; pp. 69 - 85
• Main Authors: Banegas, Gustavo, Barreto, Paulo S. L. M., Boidje, Brice Odilon, Cayrel, Pierre-Louis, Dione, Gilbert Ndollane, Gaj, Kris, Gueye, Cheikh Thiécoumba, Haeussler, Richard, Klamti, Jean Belo, N’diaye, Ousmane, Nguyen, Duc Tri, Persichetti, Edoardo, Ricardini, Jefferson E.
• Format: Book Chapter
• Language: English
• Published: Switzerland Springer International Publishing AG 2019; Springer International Publishing
• Series: Lecture Notes in Computer Science
• Subjects: Code-based cryptography; Key exchange; Post-quantum cryptography
• ISBN: 3030259218; 9783030259211
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/978-3-030-25922-8_4

In this paper we revisit some of the main aspects of the DAGS Key Encapsulation Mechanism, one of the code-based candidates to NIST’s standardization call for the key exchange/encryption functionalities. In particular, we modify the algorithms for key generation, encapsulation and decapsulation to fit an alternative KEM framework, and we present a new set of parameters that use binary codes. We discuss advantages and disadvantages for each of the variants proposed.