Field 53: Security Related Control Information

Format: an16

Description: PIN Encryption Control Information. This field is mandatory when online PIN data is present, except where DUKPT information is supplied in Field 63, Tag 01. The field is comprised as below:

Position

Description

Value

1-2

Key Type Identifier

Value

Description

01

TPK

02

ZPK

3–4

Key Identifier

0 to 32

5–16

Reserved for future use

000000000000

Note: The Key Type and Key Identifiers will be supplied by Elavon.