Mathematical Mesh 3.0 Part III : Data At Rest Encryption (DARE)
draft-hallambaker-mesh-dare-08

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Network Working Group                                 P. M. Hallam-Baker
Internet-Draft                                      ThresholdSecrets.com
Intended status: Informational                              27 July 2020
Expires: 28 January 2021

    Mathematical Mesh 3.0 Part III : Data At Rest Encryption (DARE)
                     draft-hallambaker-mesh-dare-08

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.

   [Note to Readers]

   Discussion of this draft takes place on the MATHMESH mailing list
   (mathmesh@ietf.org), which is archived at
   https://mailarchive.ietf.org/arch/search/?email_list=mathmesh.

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

Status of This Memo

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   This Internet-Draft will expire on 28 January 2021.

Hallam-Baker             Expires 28 January 2021                [Page 1]
Internet-Draft        Mesh: Data At Rest Encryption            July 2020

Copyright Notice

   Copyright (c) 2020 IETF Trust and the persons identified as the
   document authors.  All rights reserved.

   This document is subject to BCP 78 and the IETF Trust's Legal
   Provisions Relating to IETF Documents (https://trustee.ietf.org/
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   Please review these documents carefully, as they describe your rights
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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 . . . . . . . . . . . . . . . . . . . . . . . .   6
       1.2.1.  Signing Individual Plaintext Envelopes  . . . . . . .   7
       1.2.2.  Signing Individual Encrypted Envelopes  . . . . . . .   7
       1.2.3.  Signing sequences of envelopes  . . . . . . . . . . .   7
     1.3.  Container . . . . . . . . . . . . . . . . . . . . . . . .   8
       1.3.1.  Container Format  . . . . . . . . . . . . . . . . . .   8
       1.3.2.  Write . . . . . . . . . . . . . . . . . . . . . . . .   9
       1.3.3.  Encryption and Authentication . . . . . . . . . . . .   9
       1.3.4.  Integrity and Signature . . . . . . . . . . . . . . .  10
       1.3.5.  Redaction . . . . . . . . . . . . . . . . . . . . . .  10
       1.3.6.  Alternative approaches  . . . . . . . . . . . . . . .  11
       1.3.7.  Efficiency  . . . . . . . . . . . . . . . . . . . . .  11
   2.  Definitions . . . . . . . . . . . . . . . . . . . . . . . . .  12
     2.1.  Related Specifications  . . . . . . . . . . . . . . . . .  12
     2.2.  Requirements Language . . . . . . . . . . . . . . . . . .  12
     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  . . . . . . . . . . . . . . . . . . . .  17
       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 . . . . . . . . . . . . . . . . .  20
     4.1.  Container Navigation  . . . . . . . . . . . . . . . . . .  21
       4.1.1.  Tree  . . . . . . . . . . . . . . . . . . . . . . . .  22