Access security subfields

The application program can include optional access security subfields. If security subfields are included:

• If a user ID field is present, a password field must be present, or the already-verified indicator (byte 4, bit 0) or the persistent verification signed-on indicator (byte 4, bit 1) must be set.
• If a profile subfield is present, a user identifier subfield also must be present.
• If a password subfield is present, a user identifier subfield also must be present.

The layout of an access security subfield follows:

Byte

Meaning

0

Length in binary of the rest of the subfield. The value does not include this length byte.

1

The subfield type. The following values are allowed:

X'00'

Profile

X'01'

Password

X'02'

User identifier

2–i

Data, such as the actual password or identifier.