RE: [cti-stix] Timestamps

I support this list 100% too.

Terry MacDonald

Senior STIX Subject Matter Expert

SOLTRA | An FS-ISAC and DTCC Company

From: cti-stix@lists.oasis-open.org [mailto:cti-stix@lists.oasis-open.org] On Behalf Of Barnum, Sean D.
Sent: Wednesday, 2 December 2015 7:05 AM
To: Jordan, Bret <bret.jordan@bluecoat.com>; cti-stix@lists.oasis-open.org
Subject: Re: [cti-stix] Timestamps - Proposal

I support this list 100%.

sean

From: "cti-stix@lists.oasis-open.org" <cti-stix@lists.oasis-open.org> on behalf of "Jordan, Bret" <bret.jordan@bluecoat.com>
Date: Tuesday, December 1, 2015 at 2:31 PM
To: "cti-stix@lists.oasis-open.org" <cti-stix@lists.oasis-open.org>
Subject: [cti-stix] Timestamps - Proposal

All,

In an effort to resolve the endless timestamp debate and come to consensus, Mark, John Wunder, Jason, and I had a lively chat on Slack and have all agreed to give and take to come to middle ground on the following. We would therefor like to propose the following as an official proposal for timestamps in STIX 2.0. Is everyone okay with this?

1) Timestamps MUST follow RFC 3339 with the following extra requirements
2) Timestamps MUST use the timezone offset
3) Timestamps MUST use the following format yyyy-mm-ddThh:mm:ss.mmmmmm+-hh:mm
4) There will be an optional precision field (timestamp-precision) with the following string values: year, month, day, hour, minute, second. If precision is omitted, the default value of precision is "microsecond"
5) When using the precision field, unknown values MUST be zeroed out

Thanks,

Bret

Bret Jordan CISSP

Director of Security Architecture and Standards | Office of the CTO

Blue Coat Systems

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