Table 4.

Probable personally identifiable information (PII) combinations for hash codes with different matching types.

Index	Hash code	Combinations of personally identifiable information fields								Missed fields	Type of hash code
1	1	GIID	SEX	DOB	YOB						Perfect
2		a	SEX	DOB	YOB					GIID	Good
3	2	FN	LN	MN	DOB	MOB	COB				Perfect
4	3	MFN	MLN	FFN	FLN	FN	YOB				Perfect
5		MLN	a	FFN	FLN	FN	YOB			MFN	Perfect
6		MFN	FFN	a	FLN	FN	YOB			MLN	Perfect
7		MFN	MLN	FLN	a	FN	YOB			FFN	Perfect
8		MFN	MLN	FFN	FN	a	YOB			FLN	Perfect
9		a	a	FFN	FLN	FN	YOB			MFN, MLN	Good
10		a	MLN	a	FLN	FN	YOB			MFN, FFN	Good
11		a	MLN	FFN	a	FN	YOB			MFN, FLN	Good
12		MFN	a	a	FLN	FN	YOB			MLN, FFN	Good
13		MFN	a	FFN	a	FN	YOB			MLN, FLN	Good
14		MFN	MLN	a	a	FN	YOB			FFN, FLN	Good
15		a	a	a	FLN	FN	YOB			MFN, MLN, FFN	Good
16		MFN	a	a	a	FN	YOB			MLN, FFN, FLN	Good
17		a	MLN	a	a	FN	YOB			MFN, FFN, FLN	Good
18		a	a	FFN	a	FN	YOB			MFN, MLN, FLN	Good
20	4	MDOB	MMOB	FDOB	FMOB	FN	LN	SEX	COB		Perfect
19		a	MMOB	FDOB	FMOB	FN	LN	SEX	COB	MDOB	Perfect
21		MDOB	a	FDOB	FMOB	FN	LN	SEX	COB	MMOB	Perfect
22		MDOB	MMOB	a	FMOB	FN	LN	SEX	COB	FDOB	Perfect
23		MDOB	MMOB	FDOB	a	FN	LN	SEX	COB FMOD	Perfect
24		a	a	FDOB	FMOB	FN	LN	SEX	COB	MDOB, MMOB	Good
25		a	MMOB	a	FMOB	FN	LN	SEX	COB	MDOB, FDOB	Good
26		a	MMOB	FDOB	a	FN	LN	SEX	COB	MDOB, FMOB	Good
27		MDOB	a	a	FMOB	FN	LN	SEX	COB	MMOB, FDOB	Good
28		MDOB	a	FDOB	a	FN	LN	SEX	COB	MMOB, FMOB	Good
29		MDOB	MMOB	a	a	FN	LN	SEX	COB	FDOB, FMOB	Good
30		a	a	a	FMOB	FN	LN	SEX	COB	MDOB, MMOB, FDOB	Good
31		a	a	FDOB	a	FN	LN	SEX	COB	MDOB, MMOB, FMOB	Good
32		a	MMOB	a	a	FN	LN	SEX	COB	MDOB, FDOB, FMOB	Good
33		MDOB	a	a	a	FN	LN	SEX	COB	MMOB, FDOB, FMOB	Good
34	5	FN	MN	MFN	FFN	MLN	MOB				Perfect
35		FN	MN	a	FFN	MLN	MOB			MFN	Perfect
36		FN	MN	MFN	a	MLN	MOB			FFN	Perfect
37		FN	MN	MFN	FFN	a	MOB			MLN	Perfect
38		FN	MN	MFN	a	a	MOB			FFN, MLN	Good
39		FN	MN	a	a	MLN	MOB			MFN, FFN	Good
40		FN	MN	a	FFN	a	MOB			MFN, MLN	Good
41		FN	MN	a	a	a	MOB			MFN, FFN, MLN	Good

^aThe optional field that may be missed while being collected.