Abstract: It is inter-alia disclosed a method performed by at least one apparatus, said method comprising receiving or causing of receiving a connection establishment message from at least one external apparatus or transmitting or causing of transmitting the connection establishment message to the at least one external apparatus; obtaining or causing of obtaining a decentralized identifier representative of the external apparatus based on the connection establishment message; obtaining or causing of obtaining at least one hash value generated based on at least part of the obtained decentralized identifier; storing or causing of storing the at least one hash value in association with at least part of the decentralized identifier in a securitized portion of a memory of a distributed ledger system comprising the peer-to-peer network based on a consensus processing involving at least a subgroup of the nodes of the peer-to-peer network.

Abstract: A method performed by at least one apparatus. The method includes receiving or causing of receiving a connection establishment message from at least one external apparatus or transmitting or causing of transmitting the connection establishment message to the at least one external apparatus. The method includes obtaining or causing of obtaining a decentralized identifier representative of the external apparatus based on the connection establishment message. The method includes obtaining or causing of obtaining at least one hash value generated based on at least part of the obtained decentralized identifier. The method includes storing or causing of storing the at least one hash value in association with at least part of the decentralized identifier in a securitized portion of a memory of a distributed ledger system comprising the peer-to-peer network based on a consensus processing involving at least a subgroup of the nodes of the peer-to-peer network.

Abstract: A method performed by at least one apparatus. The method comprising storing a first data portion and a second data portion of at least one data block in a data memory portion assigned to the at least one node. The first data portion stored as immutable data. Causing first hash information to be stored in association with the first data portion as part of a distributed ledger. Causing second hash information to be stored in association with the second data portion as part of the distributed ledger. Obtaining modification request information relating to the at least one data block. Causing the second hash information associated with the second data portion to be deleted and/or causing of new second hash information to be stored in association with a new second data portion for the at least one data block as part of the distributed ledger based on the modification request information.

Abstract: It is inter-alia disclosed a method performed by at least one apparatus, said method comprising receiving or causing of receiving a connection establishment message from at least one external apparatus or transmitting or causing of transmitting the connection establishment message to the at least one external apparatus; obtaining or causing of obtaining a decentralized identifier representative of the external apparatus based on the connection establishment message; obtaining or causing of obtaining at least one hash value generated based on at least part of the obtained decentralized identifier; storing or causing of storing the at least one hash value in association with at least part of the decentralized identifier in a securitized portion of a memory of a distributed ledger system comprising the peer-to-peer network based on a consensus processing involving at least a subgroup of the nodes of the peer-to-peer network.