Requirement 2 (A)
Requirement
Explain the difference between the automated fingerprint identification systems (AFIS) now used by law enforcement agencies and the biometric fingerprint systems used to control access to computers and places like buildings and airports.
AFIS vs. Biometric Fingerprint Systems
The key difference between an automated fingerprint identification system (AFIS) and a biometric fingerprint system is that AFIS is designed to positively identify a fingerprint in a file of thousands or millions of records. Biometric systems usually determine only that a fingerprint is somewhat similar (not necessarily a positive match) when compared against one fingerprint registered to that person.
AFIS (Automated Fingerprint Identification System)
AFIS is the fingerprint technology used by law enforcement agencies.
What AFIS does:
- Stores millions of fingerprint records from arrests and crime scenes
- Compares unknown or “latent” prints from a crime scene to prints in the database
- Helps identify suspects, victims, or repeat offenders
- Uses very detailed fingerprint features (minutiae, ridge shapes, patterns)
Key points:
- Purpose: Solve crimes and maintain criminal history records
- Scale: Huge national or statewide databases
- Accuracy Requirement: Very high—mistakes could affect criminal cases
- Input: Prints may be messy, partial, or smudged from a crime scene
Biometric Fingerprint System
These are the fingerprint scanners used for security and access control, like:
- Smartphones
- Office buildings
- Airports
- Secure rooms or computer login systems
What a biometric system does:
- Verifies that a person is who they claim to be
- Compares your fingerprint to your own saved fingerprint template, not to millions of others
- Works quickly for everyday access
Key points:
- Purpose: Convenience and security for identity verification
- Scale: Very small database—often just one or a few fingerprints
- Accuracy Requirement: Fast and reliable but not as forensic-level precise
- Input: Clean, deliberate scans from a cooperative user (not crime-scene prints)
AFIS (Law Enforcement)
Biometric Systems (Access Control)
Main Purpose
Identify unknown people; solve crimes
Confirm identity for access
Database Size
Millions of criminal and forensic prints
A few prints per userConfirm identity for access
Type of Prints
Crime‑scene latent prints; ink or live-scan
Clean, intentional scans
Accuracy Needed
Extremely high (legal impact)
High but focused on speed
Search Type
One‑to‑many (compare to huge database)
One‑to‑one (you vs. your saved print)
Did You Know:
The AFIS is the largest person-centered database in the world, with over 100 million fingerprint records, providing automated fingerprint searches and exchanges and text searches of information.
Now that you have learned about automated fingerprint identification systems (AFIS) and biometric fingerprint systems,
let’s discuss how society uses tokens, passwords, and biometrics in everyday life.
