Abstract: Electronic locking system for the control of access, which is composed of the following elements: a physical device capable of storing a user code and an order code which represents the time at which said device is issued and optionally capable of storing zone codes which represent the zones accessible by said device and a physical device in which the information contained is stored in a coded form according to a coding algorithm and a secret code which is different for each installation, an electromechanical locking system which controls access to the zones, issuers for the devices capable of storing information in the users' devices, information which is stored in a coded form according to a coding algorithm and a secret code which is different for each installation, programmers capable of transferring information to the electronic circuits of the doors, a computer which manages the entire installation and is responsible for sending information to the users' device issuers and to the programmers o

Abstract: Electronic locking system for the control of access, which is composed of the following elements: a physical device capable of storing a user code and an order code which represents the time at which said device emits a signal and optionally capable of storing zone codes which represent the zones accessible by said device and a physical device in which the information contained is stored in a coded form according to a coding algorithm and a secret code which is different for each installation, an electromechanical locking system which controls access to the zones, transmitters for the devices capable of storing information in the users' devices, information which is stored in a coded form according to a coding algorithm and a secret code which is different for each installation, programmers capable of transferring information to the electronic circuits of the doors, a computer which manages the entire installation and is responsible for sending information to the users' device transmitters and to the programm

Abstract: Asynchronous communication protocol for electronic keys of security locks and systems, characterized by the use of a same and only channel to transmit the time and the data (bits), that single channel has two states: one normal state of rest and another active state when communication occurs and through the use of an active pulse to indicate the start of a bit; using an active pulse to indicate the transmission of a 1 bit, and the use of a resting state for the transmission of a 0 bit; the active pulse consists of the maintenance of the communication channel in an active state during a brief period of time and the use of a resting state which permits the extraction of energy from the communication channel and an active state which does not impede the maintenance of a certain level of energy which is sufficient for the proper functioning of the devices connected to the communication channel.