Fig. 1From: Decentralized and permission-less green energy certificates with GECKOIn GECKO, DSOs issue certificates for power plants (1) and producers use these certificates to sign produced units of renewable energy (2). This information is stored on a blockchain chronologically ordered and consumers can verify the integrity and origin of certificates (3). Solid arrows from DSO, producer and consumer to the blockchain denote data that is written to or read from blocks and dashed arrows from DSO to producer and consumer denote the certificate information contained in that dataBack to article page