Mathematical Mesh 3.0 Part III : Data At Rest Encryption (DARE)
draft-hallambaker-mesh-dare-04

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Network Working Group                                    P. Hallam-Baker
Internet-Draft                                           August 13, 2019
Intended status: Informational
Expires: February 14, 2020

    Mathematical Mesh 3.0 Part III : Data At Rest Encryption (DARE)
                     draft-hallambaker-mesh-dare-04

Abstract

   This document describes the Data At Rest Encryption (DARE) Envelope
   and Container syntax.

   The DARE Envelope syntax is used to digitally sign, digest,
   authenticate, or encrypt arbitrary content data.

   The DARE Container syntax describes an append-only sequence of
   entries, each containing a DARE Envelope.  DARE Containers may
   support cryptographic integrity verification of the entire data
   container content by means of a Merkle tree.

   This document is also available online at
   http://mathmesh.com/Documents/draft-hallambaker-mesh-dare.html [1] .

Status of This Memo

   This Internet-Draft is submitted in full conformance with the
   provisions of BCP 78 and BCP 79.

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   This Internet-Draft will expire on February 14, 2020.

Copyright Notice

   Copyright (c) 2019 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

Hallam-Baker            Expires February 14, 2020               [Page 1]
Internet-Draft        Mesh: Data At Rest Encryption          August 2019

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Table of Contents

   1.  Introduction  . . . . . . . . . . . . . . . . . . . . . . . .   4
     1.1.  Encryption and Integrity  . . . . . . . . . . . . . . . .   5
       1.1.1.  Key Exchange  . . . . . . . . . . . . . . . . . . . .   5
       1.1.2.  Data Erasure  . . . . . . . . . . . . . . . . . . . .   6
     1.2.  Signature . . . . . . . . . . . . . . . . . . . . . . . .   7
       1.2.1.  Signing Individual Plaintext Envelopes  . . . . . . .   7
       1.2.2.  Signing Individual Encrypted Envelopes  . . . . . . .   7
       1.2.3.  Signing sequences of envelopes  . . . . . . . . . . .   8
     1.3.  Container . . . . . . . . . . . . . . . . . . . . . . . .   8
       1.3.1.  Container Format  . . . . . . . . . . . . . . . . . .   8
       1.3.2.  Write . . . . . . . . . . . . . . . . . . . . . . . .   9
       1.3.3.  Encryption and Authentication . . . . . . . . . . . .  10
       1.3.4.  Integrity and Signature . . . . . . . . . . . . . . .  10
       1.3.5.  Redaction . . . . . . . . . . . . . . . . . . . . . .  11
       1.3.6.  Alternative approaches  . . . . . . . . . . . . . . .  11
       1.3.7.  Efficiency  . . . . . . . . . . . . . . . . . . . . .  12
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .  12
     2.1.  Related Specifications  . . . . . . . . . . . . . . . . .  12
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .  13
     2.3.  Defined terms . . . . . . . . . . . . . . . . . . . . . .  13
   3.  DARE Envelope Architecture  . . . . . . . . . . . . . . . . .  14
     3.1.  Processing Considerations . . . . . . . . . . . . . . . .  15
     3.2.  Content Metadata and Annotations  . . . . . . . . . . . .  15
     3.3.  Encoded Data Sequence . . . . . . . . . . . . . . . . . .  16
     3.4.  Encryption and Integrity  . . . . . . . . . . . . . . . .  17
       3.4.1.  Key Exchange  . . . . . . . . . . . . . . . . . . . .  18
       3.4.2.  Key Identifiers . . . . . . . . . . . . . . . . . . .  18
       3.4.3.  Salt Derivation . . . . . . . . . . . . . . . . . . .  19
       3.4.4.  Key Derivation  . . . . . . . . . . . . . . . . . . .  19
     3.5.  Signature . . . . . . . . . . . . . . . . . . . . . . . .  20
     3.6.  Algorithms  . . . . . . . . . . . . . . . . . . . . . . .  20
       3.6.1.  Field: kwd  . . . . . . . . . . . . . . . . . . . . .  20
   4.  DARE Container Architecture . . . . . . . . . . . . . . . . .  21
     4.1.  Container Navigation  . . . . . . . . . . . . . . . . . .  21
       4.1.1.  Tree  . . . . . . . . . . . . . . . . . . . . . . . .  22