The Managed Incident Lightweight Exchange (MILE) working group develops standards to support computer and network security incident management; an incident is an unplanned event that occurs in an information technology (IT) infrastructure. An incident could be a benign configuration issue, IT incident, an infraction to a service level agreement (SLA), a system compromise, socially engineered phishing attack, or a denial-of-service (DoS) attack, etc. When an incident is detected, or suspected, there may be a need for organizations to collaborate. This collaboration effort may take several forms including joint analysis, information dissemination, and/or a coordinated operational response. Examples of the response may include filing a report, notifying the source of the incident, requesting that a third party resolve/mitigate the incident, sharing select indicators of compromise, or requesting that the source be located. By sharing indicators of compromise associated with an incident or possible threat, the information becomes a proactive defense for others that may include mitigation options. The Incident Object Description Exchange Format (IODEF) defines an information framework to represent computer and network security incidents; IODEF is defined in RFC 5070 and has been extended by RFC 5091 to support phishing reports; RFC 6484 provides a template for defining extensions to IODEF. Real-time Inter-network Defense (RID) defines a protocol to facilitate sharing computer and network security incidents; RID is defined in RFC 6545, and RID over HTTPS is defined in RFC 6546. The MILE WG is focused on two areas, IODEF the data format and extensions to represent incident and indicator data and RID, the policy and transport for structured data. With respect to IODEF, the working group will: - Revise the IODEF document to incorporate enhancements and extensions based on operational experience; use by Computer Security Incident Response Teams (CSIRTs) and others has exposed the need to extend IODEF to support industry specific extensions, use case specific content, and representations to associate information related to represented threats (system, threat actors, campaigns, etc.). The value of information sharing has been demonstrated and highlighted at an increasing rate through the success of the Information Sharing and Analysis Centers (ISACs) and the recent cyber security Executive Order in the US. International groups, such as the Multinational Association for Collaborative Cyber Situational Awareness (CCSA) have been running experiments to determine what data is useful to exchange between industries and nations to effectively mitigate threats. The work of these and other groups have identified or are working to develop data representations relevant to their use cases that may compliment/extend IODEF or be useful to exchange using RID and related transport protocols. - Provide guidance on the implementation and use of IODEF to aid implementers in developing interoperable specifications. With respect to RID, the working group will: - Define a resource-oriented approach to cyber security information sharing that follows the REST architectural style. This mechanism will allow CSIRTS to be more dynamic and agile in collaborating with a broader, and varying constituency. - Provide guidance on the implementation and use of RID transports based on use cases. The guidance document will show the relationship between transport options (RID + RID transport and IODEF/RID + ROLIE) and may identify the need for additional transport bindings. - RID may require modifications to address data provenance, additional policy options, or other changes now that there are multiple interoperable implementations of RFC6545 and RFC6546. With the RID implementations in the open source community, increased use and experimentation may demonstrate the need for a revision.