
116
seCurity and PrivaCy in smart Grids
• IEC 62056-53: A standard that defines a COSEM applica-
tion layer.
• IEC 62056-61: A standard that defines an object identifica-
tion system (OBIS).
• IEC 62056-62: A standard that defines interface classes and
a data model.
Similar to ANSI C12.22, IEC62056-53, the application-layer com-
munication protocol in the COSEM model (Figure4.6), is defined
based on several other IEC 62056 series protocols, including IEC
62056-21, –42, –46, and –47. Except for IEC 62056-21, which is
used in handheld devices for locally exchanging data with meters, the
remaining protocols are used to define different layers of the comm ...