General Security Considerations for Crypto Asset Exchange
draft-vcgtf-crypto-assets-security-considerations-01
The information below is for an old version of the document.
| Document | Type |
This is an older version of an Internet-Draft whose latest revision state is "Expired".
|
|
|---|---|---|---|
| Authors | Masashi Sato , Masaki Shimaoka , Hirotaka Nakajima | ||
| Last updated | 2018-07-02 | ||
| RFC stream | (None) | ||
| Formats | |||
| Stream | Stream state | (No stream defined) | |
| Consensus boilerplate | Unknown | ||
| RFC Editor Note | (None) | ||
| IESG | IESG state | I-D Exists | |
| Telechat date | (None) | ||
| Responsible AD | (None) | ||
| Send notices to | (None) |
draft-vcgtf-crypto-assets-security-considerations-01
Network Working Group M. Sato
Internet-Draft M. Shimaoka
Intended status: Informational SECOM IS Lab.
Expires: January 3, 2019 H. Nakajima, Ed.
Mercari R4D
July 2, 2018
General Security Considerations for Crypto Asset Exchange
draft-vcgtf-crypto-assets-security-considerations-01
Abstract
This document discusses the threat, risk, and controls on the
followings; Online system of crypto asset exchange that provides the
exchange service to its customer (consumers and trade partners);
asset information (including the private key of the crypto asset)
that the online system of a crypto asset exchange manages; Social
impact that can arise from the discrepancy in the security measures
that are implemented in the online system of a crypto asset exchange.
This document is applicable to the crypto asset exchanges that
manages the private key that corresponds to crypto asset. It
includes the organizations that outsources the key management to
another organization. In such a case, the certain recommendations
applies to those outsourcers.
Status of This Memo
This Internet-Draft is submitted in full conformance with the
provisions of BCP 78 and BCP 79.
Internet-Drafts are working documents of the Internet Engineering
Task Force (IETF). Note that other groups may also distribute
working documents as Internet-Drafts. The list of current Internet-
Drafts is at https://datatracker.ietf.org/drafts/current/.
Internet-Drafts are draft documents valid for a maximum of six months
and may be updated, replaced, or obsoleted by other documents at any
time. It is inappropriate to use Internet-Drafts as reference
material or to cite them other than as "work in progress."
This Internet-Draft will expire on January 3, 2019.
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Copyright Notice
Copyright (c) 2018 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/license-info) in effect on the date of
publication of this document. Please review these documents
carefully, as they describe your rights and restrictions with respect
to this document. Code Components extracted from this document must
include Simplified BSD License text as described in Section 4.e of
the Trust Legal Provisions and are provided without warranty as
described in the Simplified BSD License.
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . 3
2. Scope of this document . . . . . . . . . . . . . . . . . . . 3
3. Conventions and Definitions . . . . . . . . . . . . . . . . . 3
4. Terminology . . . . . . . . . . . . . . . . . . . . . . . . . 3
5. Basic description of a model online system of a crypto asset
exchange . . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 3
5.2. A basic model of online system of a crypto asset exchange
and its functional components . . . . . . . . . . . . . . 3
5.3. The flow leading to the sending of the transaction . . . 4
5.4. Types of keys that are used for signature and encryption 4
5.4.1. Type of keys . . . . . . . . . . . . . . . . . . . . 4
5.4.2. A flow for the key generation and the key usage . . . 4
5.4.3. On the usage of multiple keys . . . . . . . . . . . . 4
5.4.4. On the suspension of keys . . . . . . . . . . . . . . 4
5.5. On the characteristics of crypto asset on Blockchain and
distributed ledger technologies . . . . . . . . . . . . . 4
5.5.1. General . . . . . . . . . . . . . . . . . . . . . . . 4
5.5.2. The importance of the private key used for signing . 4
5.5.3. Diversity of implementations . . . . . . . . . . . . 4
5.5.4. Risk on the unapproved transactions . . . . . . . . . 4
6. Basic objectives for the security management of crypto asset
exchanges . . . . . . . . . . . . . . . . . . . . . . . . . . 4
7. Approaches to basic security controls . . . . . . . . . . . . 4
8. Sector specific security management controls for crypto asset
exchanges . . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.1. General . . . . . . . . . . . . . . . . . . . . . . . . . 5
8.2. On the direction of the information security management . 5
8.3. On the controls for key recovery . . . . . . . . . . . . 5
8.4. On the controls against theft and leakage of the private
key for signing . . . . . . . . . . . . . . . . . . . . . 5
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8.5. On the illegal operation of the private key for signing . 5
8.6. On the illegal operation against the asset data . . . . . 5
8.7. On the user authentication . . . . . . . . . . . . . . . 5
8.8. On the withdrawal of the coins . . . . . . . . . . . . . 5
8.9. On the transfer of the crypto asset to an unused address 5
9. Remaining issues . . . . . . . . . . . . . . . . . . . . . . 5
10. Security Considerations . . . . . . . . . . . . . . . . . . . 5
11. IANA Considerations . . . . . . . . . . . . . . . . . . . . . 5
12. Normative References . . . . . . . . . . . . . . . . . . . . 5
Appendix A. Contributors . . . . . . . . . . . . . . . . . . . . 6
Authors' Addresses . . . . . . . . . . . . . . . . . . . . . . . 6
1. Introduction
TBD
2. Scope of this document
In this document, crypto asset exchange operators which hold a
private key of crypto asset.
3. Conventions and Definitions
The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT",
"SHOULD", "SHOULD NOT", "RECOMMENDED", "NOT RECOMMENDED", "MAY", and
"OPTIONAL" in this document are to be interpreted as described in BCP
14 [RFC2119] [RFC8174] when, and only when, they appear in all
capitals, as shown here.
4. Terminology
Terms used in this document are defined in other i-d.
5. Basic description of a model online system of a crypto asset
exchange
5.1. General
In this section, a model online system of a crypto asset exchange
that is used to explain the concepts and provisions in this document
are explained.
5.2. A basic model of online system of a crypto asset exchange and its
functional components
Followings are the basic model of a crypto asset exchange that this
document deals with.
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5.3. The flow leading to the sending of the transaction
5.4. Types of keys that are used for signature and encryption
5.4.1. Type of keys
5.4.2. A flow for the key generation and the key usage
5.4.3. On the usage of multiple keys
5.4.4. On the suspension of keys
5.5. On the characteristics of crypto asset on Blockchain and
distributed ledger technologies
5.5.1. General
5.5.2. The importance of the private key used for signing
5.5.3. Diversity of implementations
5.5.3.1. On the cryptographic algorithms used by crypto asset
5.5.3.2. On the possibility of the forking of the Blockchain
5.5.3.3. Rollback by reorganization
5.5.3.4. The treatment of the forked crypto asset
5.5.4. Risk on the unapproved transactions
5.5.4.1. General
5.5.4.2. The handling of the unapproved transactions
5.5.4.3. Transaction failures caused by the vulnerabilities of the
implementation or the specification of the crypto asset
6. Basic objectives for the security management of crypto asset
exchanges
7. Approaches to basic security controls
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8. Sector specific security management controls for crypto asset
exchanges
8.1. General
8.2. On the direction of the information security management
8.3. On the controls for key recovery
8.4. On the controls against theft and leakage of the private key for
signing
8.5. On the illegal operation of the private key for signing
8.6. On the illegal operation against the asset data
8.7. On the user authentication
8.8. On the withdrawal of the coins
8.9. On the transfer of the crypto asset to an unused address
9. Remaining issues
10. Security Considerations
Security Considerations are included in main section of this
document.
11. IANA Considerations
None.
12. Normative References
[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate
Requirement Levels", BCP 14, RFC 2119,
DOI 10.17487/RFC2119, March 1997,
<https://www.rfc-editor.org/info/rfc2119>.
[RFC8174] Leiba, B., "Ambiguity of Uppercase vs Lowercase in RFC
2119 Key Words", BCP 14, RFC 8174, DOI 10.17487/RFC8174,
May 2017, <https://www.rfc-editor.org/info/rfc8174>.
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Appendix A. Contributors
Authors' Addresses
Masashi Sato
SECOM Co., Ltd. Intelligent System Laboratory
SECOM SC Center
8-10-16 Shimorenjaku
Mitaka, Tokyo 181-8528
JAPAN
Email: satomasa756@gmail.com
Masaki Shimaoka
SECOM Co., Ltd. Intelligent System Laboratory
SECOM SC Center
8-10-16 Shimorenjaku
Mitaka, Tokyo 181-8528
JAPAN
Email: m-shimaoka@secom.co.jp
Hirotaka Nakajima (editor)
Mercari, Inc. R4D
Roppongi Hills Mori Tower 18F
6-10-1 Roppongi
Minato, Tokyo 106-6118
JAPAN
Email: nunnun@mercari.com
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