NEC BioCripto Card, User Manual

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1.2  Overview and use of the Unit

1.2  Overview and use of the Unit

1.2.1  Configuration of the unit

This unit consists of BioCripto Card (hardware).

The Software is optional.  For software installation, see optional software (How to use Secure Finger fingerprint authen-

tication basic utility).

1.2.2  Overview

Fingerprint information can be registered in the nonvolatile memory within BioCripto Card.  Up to 200 fingerprints can

be registered in BioCripto Card.

Fingerprint characteristics

Registration of multiple fingerprints of the same user is recommended.

When inputting a fingerprint, place the center of the fingerprint at the center of the BioCripto sensor.

The center of the fingerprint spiral is usually coincides with the base of the nail, therefore, you can find right place for

register and collation easily.

Fingerprint registration may be difficult in the following cases.

• When the finger is sweaty or oily, and gaps between the fingerprint lines are filled up.

• When the finger is extremely dry.

• When the finger is too small.

• When the finger is too big.

• When the fingerprint is not spiral shape.

• When the hand is rough.

• When the fingerprint is not clear due to abrasions.

In such cases, wipe off the sweat and oil, and if the hand is extremely dry or rough, use some hand cream to improve

fingerprinting.

And if the finger is too small, use the thumb for registration for it is larger in size.

The fingerprint characteristics may change, resulting in mismatches during collating in the following cases.

• In summer, when there is a lot of sweat and oil.

• In winter, when it is extremely dry.

• When the hand is rough or when the finger is injured.

• When suddenly become fat or thin.

When a finger is difficult to register, it is likely to cause mismatch during collation.  If all the fingers are difficult to

register, register one finger multiple times.  It will cause the mismatch to occur less frequently.