Abstract: A plurality of different types of resource access events are identified. For example, a resource access event may be an administration event where a user is given certain access rights to view/modify a resource, such as, a database record. A plurality of blocks are generated, where each block is associated with an individual one of the plurality of different types of resource access events. The plurality of blocks are added to a first resource access blockchain. The blockchain can be used to track the various types of resource access events.

Abstract: An unlocking method and an electronic device relate to the field of terminal technologies.

Abstract: Apparatus configured to obtain a hash of a file to be transmitted to a second apparatus and an indication of a file creator of the file; retrieve an identifier associated with the file creator; store the hash of the file, associated with the identifier of the file creator, in an immutable ledger; obtain the hash of the file from the second apparatus; verify that the hash of the file is stored in the immutable ledger; retrieve, from the immutable ledger, one or more assertions associated with the file; retrieve, from the immutable ledger, the associated identifier of the file creator using the hash of the file; and transmit, to the second apparatus: a confirmation that the file is from the file creator; and at least one of the one or more assertions associated with the file.