Secure encryption/decryption for elevators

A secure communication system for an elevator information or control system comprising:

• a primary controller for controlling operations of a plurality of elevators, displays, voice units, and communication lanes wherein the primary controller includes;
• at least one block of data assembled into unencrypted N-bits of information;
• an encryption routine including an encryption algorithm for encoding the data into at least one block of encrypted M-bits of information;
• a data encryption mask directing the encryption routine for placing the N-bits of information into M-bits of information;
• a transmitter for transmitting encrypted data from the primary controller;
• a plurality of subordinate controllers for controlling inputs to and outputs from an elevator wherein the subordinate controllers include;
• receivers for receiving the encrypted data from the transmitter wherein the receivers include:
• a decryption algorithm in the subordinate controllers for decoding the encrypted information into unencrypted information.

A secure communication system for an elevator information or control system comprising:

• a primary controller for controlling operations of a plurality of elevators, information displays and other output devices;
• a plurality of subordinate controllers for controlling inputs to and outputs from an elevator;
• a floor block of unencrypted N-bits of floor information;
• a message block of unencrypted N-bits of message information;
• a travel block of unencrypted N-bits of travel information;
• an encryption device for encoding the N-bits of information into encrypted M-bits of information;
• a data encryption mask defining an encryption routine for placing the N-bits of information into the M-bits of information;
• three separate blocks of encrypted M-bits of information, each block of encrypted M-bits of information including scrambled, encrypted bits of floor, message and travel information;
• a transmitter for transmitting encrypted data from the primary controller to the subordinate controllers;
• and
• a decryption algorithm in the subordinate controllers for decoding the encrypted information into unencrypted information.

A process for transmitting data for an elevator information control system with a secure communication system comprising the steps of:

• placing at least one block of data assembled into unencrypted N-bits of information in at least one data packet;
• selecting a data encryption mask directing an encryption routine for placing the N-bits of information into M-bits of information;
• using an encryption algorithm for encoding the data into at least one block of encrypted M-bits of information;
• and
• transmitting the encrypted information.

A process for transmitting data for an elevator control system with a secure communication system comprising the steps of:

• placing floor information in unencoded floor data packet;
• placing message information in unencoded message data packets;
• placing travel information in unencoded travel data packets;
• selecting a data encryptioin mask defining an encryption routine for scrambling the information in the three data packets;
• using an encryption algorithm for encoding the information in the three data packets;
• and
• transmitting the encrypted information.

A process for transmitting data for an elevator information or control system with a secure communication system comprising the steps of:

• retrieving unencoded floor information;
• retrieving unencoded message information;
• retrieving unencoded travel information;
• scrambling the information into three data packets using a data encryption mask defining an encryption routine;
• using an encryption algorithm for encoding the information in the three data packets;
• and
• transmitting the encrypted data packets.