IEC TR 62351-90-2:2018
(Main)Power systems management and associated information exchange - Data and communications security - Part 90-2: Deep packet inspection of encrypted communications
Power systems management and associated information exchange - Data and communications security - Part 90-2: Deep packet inspection of encrypted communications
IEC TR 62351-90-2:2018, which is a technical report, addresses the need to perform Deep Packet Inspection (DPI) on communication channels secured by IEC 62351. The main focus is the illustration of the state-of-the art of DPI techniques that can be applied to the various kinds of channels, highlighting the possible security risks and implementation costs. Additional, beyond state-of-the-art proposals are also described in order to circumvent the main limits of existing solutions.
It is to be noted that some communications secured by IEC 62351 are not encrypted, but only add integrity and non-repudiation of the message – however they are mentioned here for the sake of completeness around IEC 62351 and DPI
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IEC TR 62351-90-2 ®
Edition 1.0 2018-09
TECHNICAL
REPORT
colour
inside
Power systems management and associated information exchange – Data and
communications security –
Part 90-2: Deep packet inspection of encrypted communications
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IEC TR 62351-90-2 ®
Edition 1.0 2018-09
TECHNICAL
REPORT
colour
inside
Power systems management and associated information exchange – Data and
communications security –
Part 90-2: Deep packet inspection of encrypted communications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 33.200 ISBN 978-2-8322-6038-8
– 2 – IEC TR 62351-90-2:2018 IEC 2018
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references . 7
3 Terms, definitions and abbreviated terms . 8
3.1 Terms and definitions . 8
3.2 Abbreviated terms . 8
4 Overview . 8
5 Monitoring and auditing requirements . 9
5.1 Use cases from utilities . 9
5.2 Use cases from vendors. 9
5.3 A similar use case: Encrypted SIP Calls Recording . 10
6 Overview of encrypted channels in IEC 62351 . 10
6.1 General . 10
6.2 IEC 62351-3 . 10
6.3 IEC TS 62351-4 . 10
6.4 IEC TS 62351-6 . 11
7 DPI for encrypted communication techniques evaluation framework . 11
8 State of the art of ready techniques . 12
8.1 General . 12
8.2 Unencrypted TLS . 12
8.3 Private key sharing . 13
9 State of the art of techniques that need adaptation . 14
9.1 General . 14
9.2 Proxy . 14
9.3 Advanced Middlebox (mcTLS) . 16
9.4 Secure session-key sharing . 18
9.5 Delayed secure session-key sharing . 20
9.6 Application-level mirroring . 21
10 Additional proposals . 23
10.1 Secure private-key sharing . 23
11 State of the art summary . 24
12 Practical considerations for ready techniques . 26
12.1 General . 26
12.2 Unencrypted TLS . 26
12.3 Private-key sharing . 26
12.4 Recommendations to mitigate risks . 26
13 Future challenges . 27
Bibliography . 28
Figure 1 – Unencrypted TLS sample architecture . 12
Figure 2 – Private Key sharing sample architecture . 13
Figure 3 – Proxy scenario sample architecture . 15
Figure 4 – Advanced Middlebox sample architecture . 17
Figure 5 – Secure session-key sharing sample architecture . 18
Figure 6 – Delayed secure session-sharing sample architecture . 20
Figure 7 – Application-level mirroring sample architecture . 22
Table 1 – State of the art summary . 25
– 4 – IEC TR 62351-90-2:2018 IEC 2018
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
POWER SYSTEMS MANAGEMENT
AND ASSOCIATED INFORMATION EXCHANGE –
DATA AND COMMUNICATIONS SECURITY –
Part 90-2: Deep packet inspection
of encrypted communications
FOREWORD
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IEC TR 62351-90-2, which is a technical report, has been prepared by IEC technical
committee 57: Power systems management and associated information exchange.
The text of this Technical Report is based on the following documents:
Enquiry draft Report on voting
57/1939/DTR 57/2002/RVDTR
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report on voting indicated in the above table.
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management and associated information exchange – Data and communications security, can
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