A Facile Solution on Secret Key generation and Secure Distribution
Lifeng Cai · Research Square · 2021
Abstract We designed systems to generate and securely distribute unlimited number of secret keys from a master key with key strength of the system can be equal to the bit-count of the master key. We first set 3 prerequisites for system security from basic principles and design scheme accordingly, use master key as the solely system privacy, combine the master key and arbitrarily unrepeated timestamps to generate medium keys, generate keys therefrom using one-way data conversion algorithm (OWDCA), and distribute keys by corresponding timestamps between legitimate users exclusively sharing the master key. We then defined 4 criterions for qualified OWDCA (q-OWDCA) and proved that systems based on the above scheme using q-OWDCA would fulfill these prerequisites. We designed some q-OWDCAs and constructed typical cryptosystems, demonstrating a universal strategy to realize information security in large complex systems using a single master key. Our work may solve the fundamental problem in symmetric cryptography.