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			   DigitalPersona

                 DigitalPersona Gold SDK version 2.5.0 
			
			    Release Notes
			   
			     March 2005
				
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	   (c) 2005 DigitalPersona, Inc. All Rights Reserved. 


This document provides late-breaking or other information that supplements the DigitalPersona Gold SDK documentation.


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CONTENTS
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1.   RELEASE NOTES
     1.1    FA Security Defines
     1.2    MC_verifyFeatures
     1.3    Behavior of FT_ENABLE_BASIC_REG Mask
     1.4    XTF Templates 
     1.5    dpFTConvertDB.exe Database Conversion Utility
     1.6    dpFTConvertDB.exe Sample Code
     1.7    New Functions to "Personalize" the Reader
     1.8    Change in dpFTSampleReg UI   
     1.9    Changes in Documentation and Header files


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1. RELEASE NOTES
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1.1    FA Security Defines
Given the improvements in the recognition accuracy provided by the recognition engine 2.5.0, the security constants HIGH_SEC_FA_RATE, MED_SEC_FA_RATE, and LOW_SEC_FA_RATE were adjusted to raise the security bar. HIGH_SEC_FA_RATE = 0.0001 (1/1,000,000 FAR); MED_SEC_FA_RATE = 0.0010 (1/100,000 FAR); LOW_SEC_FA_RATE = 0.0100 (1/10,000 FAR)

1.2    MC_verifyFeatures 
MC_verifyFeatures will become obsolete in the future. MC_verifyFeaturesEx should be used instead. In the next release, the function declaration will be removed from the header file.

1.3    Behavior of FT_ENABLE_BASIC_REG Mask
The FT_ENABLE_BASIC_REG bit mask is now obsolete. This bit mask was used to overwrite all the registration settings. It is now replaced by the FT_DISABLE_DEFAULT_REG bit mask. The new FT_DISABLE_DEFAULT_REG bit mask disables the default registration settings and can be bitwise or-ed with other registration settings bit masks. In this case, the default settings are disabled and the settings explicitly set by the masks are applied.

1.4    XTF Templates 
The template registration was changed to use eXtended Template Format (XTF) by default. In order to disable XTF, use the FT_DISABLE_DEFAULT_REG bit mask. Use of XTF templates improves recognition of poor quality fingerprints, which reduces the False Reject Rate while maintaining the same False Accept Rate. The speed of matching remains the same for good quality fingerprints and is slightly slower for poor quality fingerprints. The size of an XTF template is approximately four times the size of a BTF (Basic Template Format) template.

1.5	dpFTConvertDB.exe Database Conversion Utility
Databases created with DigitalPersona database functions (dpDBase module) are affected by the fact that XTF templates are used by default for template registration, due to the increase in size of the registration templates. The dpFTConvertDB.exe utility can be used to convert such databases to new ones with a specified template size.

1.6     dpFTConvertDB.exe Sample Code
dpFTConvertDB.exe is a new sample code. It demonstrates the use of database functions and shows how to convert an existing database to a new one with different features size.

1.7 	New Functions to "personalize" the Reader
Two new functions FT_SetParameter and FT_GetParameter are available to "personalize" the fingerprint reader. They can be used to write private data to the reader, which is stored as a hash, and to read the stored hash. These functions are declared in dpDevParam.h, which is a new header file. dpFTDeviceKey.exe was added to a list of sample code applications. It demonstrates utilization of two new functions FT_SetParameter and FT_GetParameter.

1.8    Change in dpFTSampleReg UI    
In order to fully demostrate the usage of registration options, a new check box was added (Disable Default Registration). By selecting it, Default Registration is disabled.

1.9    Changes in Documentation and Header files
- In all documentation and header files 'sensor' is replaced by 'fingerprint reader'
- In all documentation and header files 'GREATS' is replaced by 'XTF'