A computer program for searching du information and downloading documents in a peer-to-peer network. This link generates a plain text "digital fingerprint" through the hash results of different file contents to identify the permissions of the file. Not based on the location or name of the file.
Application of content hash function;
The most common use of magnetic link is to link to a specific file according to the hash function value of the file content and generate a unique file identifier, similar to ISBN.
Different from conventional identifiers, content hashes can be generated by anyone who holds files, so there is no need for a central organization, which makes it often used as a search condition in the field of file enjoyment, because anyone can distribute a magnetic link to ensure that the resources pointed to by the link are what he wants, regardless of how the resources are obtained.