1661   Field for Initialization vector

Created: 08 Aug 2019

Status: Not Applicable

Part: Part 90-5 (2013; Edition 1, Synchrophasor)


Page: 84, 72


Paragraph: Table 9


For MAC signature value calculations AES-GMAC-64 and AES-GMAC-128 algorithms are specified allowed algorithms (Table 9). These algorithms may require exchanging of initial vector along with key.
Similarly, the encryption algorithms AES-128-GCM and AES-256-GCM algorithms may also require such type of initial vectors.
In IEC 61850-90-5 session protocol structure (Figure 25), there is no field to send the initialization vector information.


Two solutions:
1. A new field IV can be introduced in IEC 61850-90-5 session protocol structure before KeyID. (Similar to IEC 62351-6, authentication value extension contains a IV field).
2. When using AES-GMAC algorithm for generation MAC value, along with key the initialization vectors must also be pre shared.

Discussion Created Status
Approve 11 Oct 22 Not Applicable
This is addressed in 62351-6 28 Feb 22 Approval (N/A)


Privacy | Contact | Disclaimer

Tissue DB v.