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      The Host Identity Protocol (HIP) is a host identification technology for use on Internet Protocol (IP) networks, such as the Internet. The Internet has two main name spaces, IP addresses and the Domain Name System. HIP separates the end-point identifier and locator roles of IP addresses. It introduces a Host Identity (HI) name space, based on a public key security infrastructure.
      The Host Identity Protocol provides secure methods for IP multihoming and mobile computing.
      In networks that implement the Host Identity Protocol, all occurrences of IP addresses in applications are eliminated and replaced with cryptographic host identifiers. The cryptographic keys are typically, but not necessarily, self-generated.
      The effect of eliminating IP addresses in application and transport layers is a decoupling of the transport layer from the internetworking layer (Internet Layer) in TCP/IP.
      HIP was specified in the IETF HIP working group. An Internet Research Task Force (IRTF) HIP research group looks at the broader impacts of HIP.
      The working group is chartered to produce Requests for Comments on the "Experimental" track, but it is understood that their quality and security properties should match the standards track requirements. The main purpose for producing Experimental documents instead of standards track ones are the unknown effects that the mechanisms may have on applications and on the Internet in the large.


      Version 2



      Host Identity Protocol version 2 (HIPv2), also known as HIP version 2, is an update to the protocol that enhances security and support for mobile environments. HIP continues to separate the roles of identification and location in IP addressing by implementing a host identity namespace based on cryptography. This version introduces new features that allow devices to connect more securely and efficiently, even in scenarios involving mobility and multihoming (connecting to multiple networks).


      Enhanced security


      HIPv2 strengthens device authentication security and provides protection against spoofing and denial-of-service (DoS) attacks. Host Identifiers (HIs) are generated with cryptographic keys, giving each device a unique identity. The protocol also uses the Encapsulating Security Payload (ESP) format for encrypting data, which ensures the integrity and confidentiality of communications.


      Mobility and multihoming


      HIPv2's design enables devices to change networks without losing the session, a crucial advantage for mobile and IoT applications. This capability to switch networks seamlessly makes HIPv2 well-suited for devices that require constant and reliable connectivity, such as mobile phones and IoT sensors. Additionally, HIPv2 facilitates multihoming, allowing simultaneous connections to multiple networks, which improves connection resilience and availability.


      RFC references


      RFC 4423 - Host Identity Protocol (HIP) Architecture (early "informational" snapshot, obsoleted by RFC 9063)
      RFC 5201 - Host Identity Protocol base (Obsoleted by RFC 7401)
      RFC 5202 - Using the Encapsulating Security Payload (ESP) Transport Format with the Host Identity Protocol (HIP) (Obsoleted by RFC 7402)
      RFC 5203 - Host Identity Protocol (HIP) Registration Extension (obsoleted by RFC 8003)
      RFC 5204 - Host Identity Protocol (HIP) Rendezvous Extension (obsoleted by RFC 8004)
      RFC 5205 - Host Identity Protocol (HIP) Domain Name System (DNS) Extension (obsoleted by RFC 8005)
      RFC 5206 - End-Host Mobility and Multihoming with the Host Identity Protocol
      RFC 5207 - NAT and Firewall Traversal Issues of Host Identity Protocol (HIP) Communication
      RFC 6092 - Basic Requirements for IPv6 Customer Edge Routers
      RFC 7401 - Host identity protocol version 2 (HIPv2) (updated by RFC 8002)
      RFC 7402 - Using the Encapsulating Security Payload (ESP) transport format with the Host Identity Protocol (HIP)
      RFC 8002 - Host Identity Protocol Certificates
      RFC 8003 - Host Identity Protocol (HIP) Registration Extension
      RFC 8004 - Host Identity Protocol (HIP) Rendezvous Extension
      RFC 8005 - Host Identity Protocol (HIP) Domain Name System (DNS) Extension
      RFC 8046 - Host Mobility with the Host Identity Protocol
      RFC 8047 - Host Multihoming with the Host Identity Protocol
      RFC 9028 - Native NAT Traversal Mode for the Host Identity Protocol
      RFC 9063 - Host Identity Protocol Architecture


      See also


      Identifier-Locator Network Protocol (ILNP)
      IPsec
      Locator/Identifier Separation Protocol (LISP)
      Mobile IP (MIP)
      Proxy Mobile IPv6 (PMIPv6)


      References




      External links


      IETF HIP working group
      IRTF HIP research group
      OpenHIP project
      How HIP works - InfraHIP project archive
      HIP simulation framework for OMNeT++. Archived 2019-06-28 at the Wayback Machine

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    Airwall - Host Identity Protocol | Tempered

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    Host 01 | PDF | Internet Protocols | Network Layer Protocols

    Host 01 | PDF | Internet Protocols | Network Layer Protocols

    Host Identity Protocol for Linux | Linux Journal

    Host Identity Protocol for Linux | Linux Journal

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    Host Identity Protocol - Wikipedia

    The Host Identity Protocol (HIP) is a host identification technology for use on Internet Protocol (IP) networks, such as the Internet. The Internet has two main name spaces, IP addresses and the Domain Name System. HIP separates the end-point identifier and locator roles of IP addresses.

    RFC 9063 - Host Identity Protocol Architecture - IETF Datatracker

    Using Host Identities requires its own protocol layer, the Host Identity Protocol, between the internetworking and transport layers. The names are based on public- key cryptography to supply authentication services.

    RFC 7401: Host Identity Protocol Version 2 (HIPv2) - RFC Editor

    Host Identity (HI): The public key of the signature algorithm that represents the identity of the host. In HIP, a host proves its identity by creating a signature with the private key belonging to its HI (cf. Section 3). Host Identity Tag (HIT): A shorthand for the HI in IPv6 format.

    RFC 5201: Host Identity Protocol - RFC Editor

    A New Namespace and Identifiers The Host Identity Protocol introduces a new namespace, the Host Identity namespace. Some ramifications of this new namespace are explained in the HIP architecture description [ RFC4423 ].

    HIP - Wireshark Wiki

    The Host Identity Protocol (HIP) is an Identity Exchange mechanism that enables secure communications with tunneling protocols such as ESP. HIP provides a method of separating the end-point identifier and locator roles of IP addresses.

    Primer on Host Identity Protocol - Tempered

    Host Identity Protocol (HIP) is a standard-track network security protocol, approved by the leading standards organization in the Internet, the Internet Engineering Task Force, in 2015.

    RFC 4423 - Host Identity Protocol (HIP) Architecture - IETF …

    Using Host Identities requires its own protocol layer, the Host Identity Protocol, between the internetworking and transport layers. The names are based on public key cryptography to supply authentication services.

    Using Host Identity Protocol to Enable Zero Trust

    Host Identity Protocol, or HIP, is a host identification technology that provides a method of separating the endpoint identifier and the locator roles of an IP address. HIP works by partitioning and isolating the network into trusted microsegments, providing users with an easy and cost-effective way to secure their network.

    Host Identity Protocol - Internet Engineering Task Force

    The Host Identity Protocol (HIP) provides a method of separating the end-point identifier and locator roles of IP addresses. It introduces a new Host Identity (HI) name space, based on public keys, from which end-point identifiers are taken. The public keys are typically, but not necessarily, self generated. HIP uses existing IP addressing and

    Host Identity Protocol (HIP)

    The Host Identity Protocol (HIP) has been developed alongside the IETF and the IRTF for a few years. Its development has been partially based on the discussions that took place within the NSRG. Basically, HIP is a concrete proposal for adding a new name space to the TCP/IP stack.