IPSEC:

IPsec (Internet Protocol Security) is a suite of protocols designed to secure internet communication at the IP (Internet Protocol) layer. It offers authentication, encryption, and integrity protection for data packets transmitted over IP networks. IPsec establishes security associations between devices, encrypts data for confidentiality, ensures integrity with cryptographic mechanisms, and supports various authentication methods. Widely used in VPNs and site-to-site communication, IPsec provides robust security for data exchange over public or untrusted networks, ensuring confidentiality and integrity of transmitted data.