Setup of a communication link to a user apparatus via an access control apparatus

An access control apparatus, comprising:

• at least one memory having program instructions for carrying out a method and at least one processor designed to execute the program instructions from the at least one memory, the method comprising the steps of:
• obtaining a request to set up a communication link, wherein the request contains authorization information, wherein the authorization information is at least in part encrypted;
• checking the authorization of the request to set up a communication link at least in part on the basis of the authorization information, wherein checking the authorization of the request comprises:
• decrypting the encrypted authorization information;
• and
• comparing the decrypted authorization information with unencrypted information, wherein the unencrypted information is likewise contained in the authorization information, derived from contained information and/or stored in the access control apparatus;
• causing setup of and/or setting up a communication link to a first user apparatus only if the result of the checking is that the request to set up a communication link is authorized;
• and
• wherein the request is obtained at the access control apparatus from a second user apparatus and/or from a user of the second user apparatus, and wherein the communication link is set up between the first user apparatus and the second user apparatus.

A non-transitory, machine-readable medium, comprising program instructions that are designed, when executed by at least one processor, to cause an apparatus to perform the steps of:

• obtaining a request to set up a communication link, wherein the request contains authorization information, wherein the authorization information is at least in part encrypted;
• checking the authorization of the request to set up a communication link at least in part on the basis of the authorization information, wherein checking the authorization of the request comprises:
• decrypting the encrypted authorization information;
• and
• comparing the decrypted authorization information with unencrypted information, wherein the unencrypted information is likewise contained in the authorization information, derived from contained information and/or stored in the access control apparatus;
• causing setup of and/or setting up a communication link to a first user apparatus only if the result of the checking is that the request to set up a communication link is authorized;
• and
• wherein the request is obtained at an access control apparatus from a second user apparatus and/or from a user of the second user apparatus, and wherein the communication link is set up between the first user apparatus and the second user apparatus.

A method, performed by a server, the method comprising:

• obtaining a request to compile and/or generate authorization information that authorizes setup of a communication link via an access control apparatus;
• compiling and/or generating the authorization information at least partially based on the obtained request, wherein the authorization information allows the access control apparatus to check the authorization to set up the communication link, and wherein the authorization information is based at least in part on the obtained request;
• and
• causing communication of and/or communicating the authorization information to a second user apparatus in order to authorize the second user apparatus to request setup of a communication link via the access control apparatus.