Data is sent to the system from the level of EDGE devices. It is a place where data can be pre-prepared, combined in various ways and a report of the required format can be constructed.
Messages are sent from EDGE over an IPsec secure connection. In computer science, IPsec (IP security) is the name of a security extension of the IP protocol based on the authentication and encryption of each IP datagram. In the OSI architecture, security is already at the network layer, and therefore transparently provides security to any transmission (any network application).
Security mechanisms of higher layers (above TCP/UDP protocols, where TLS/SSL, SSH, etc. work) require support inside applications. IPsec is defined in several dozens of RFCs issued by the IETF – RFC 2401 and RFC 2411 are the main ones.
IPsec uses cryptographic security services to protect communications over the IP protocol. It provides data verification, data origin, data integrity, confidentiality (encryption) and protection against replay attacks (see replay attack).
This is also one of the proofs that the security of the data sent and stored is taken very seriously, and measures have already been taken at the system architecture level so that the CitySys system meets the highest security standards.
See the following image for better understanding.