1、 INCITS/ISO/IEC 19794-11:2013 2013 ISO/IEC 19794-11:2013 Information technology Biometric data interchange formats Part 11: Signature/sign processed dynamic data INCITS/ISO/IEC 19794-11:2013 2013 PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy,
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4、nsure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. Adopted by INCITS (InterNational Committee for Information Technology Standards) as an American National Stand
5、ard. Date of ANSI Approval: 7/11/2013 Published by American National Standards Institute, 25 West 43rd Street, New York, New York 10036 Copyright 2013 by Information Technology Industry Council (ITI). All rights reserved. These materials are subject to copyright claims of International Standardizati
6、on Organization (ISO), International Electrotechnical Commission (IEC), American National Standards Institute (ANSI), and Information Technology Industry Council (ITI). Not for resale. No part of this publication may be reproduced in any form, including an electronic retrieval system, without the pr
7、ior written permission of ITI. All requests pertaining to this standard should be submitted to ITI, 1250 Eye Street NW, Washington, DC 20005. Printed in the United States of America ii ITIC 2013 All rights reserved ISO/IEC 19794-11:2013(E) ISO/IEC 2013 All rights reserved iiiContents Page Foreword i
8、v Introduction . v 1 Scope 1 2 Conformance . 1 3 Normative references 2 4 Terms and definitions . 2 5 Conventions . 2 5.1 Coordinate system 2 5.2 Byte order . 2 5.3 Registered format type identifier . 3 6 Data format relationships . 3 7 Recorded Signature/sign data . 3 7.1 Overview . 3 7.2 Dynamic-e
9、vent data . 4 7.2.1 Pen-down . 4 7.2.2 Pen-up. 4 7.2.3 urning point 4 7.3 Overall features Data . 5 8 Signature/sign processed dynamic record format 6 8.1 Overview . 6 8.2 General record header 7 8.3 Representation header 7 8.3.1 Overview . 7 8.3.2 Format for capture device technology ID . 9 8.3.3 F
10、ormat for quality descriptor . 9 8.3.4 Signature/sign processed dynamic elements of representation header . 11 8.4 Representation body . 14 8.5 Overall feature data . 15 8.6 Extended data 16 Annex A (normative) Conformance testing methodology 17 Annex B (informative) ASN.1 specification of the data
11、format . 18 Annex C (informative) Signature/signs Suitable for use in Authentication 20 Bibliography 23 ISO/IEC 19794-11:2013(E) iv ISO/IEC 2013 All rights reservedForeword ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the speci
12、alized system for worldwide standardization. National bodies that are members of ISO or IEC participate in the development of International Standards through technical committees established by the respective organization to deal with particular fields of technical activity. ISO and IEC technical co
13、mmittees collaborate in fields of mutual interest. Other international organizations, governmental and non-governmental, in liaison with ISO and IEC, also take part in the work. In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Internati
14、onal Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of the joint technical committee is to prepare International Standards. Draft International Standards adopted by the joint technical committee are circulated to national bodies for voting.
15、Publication as an International Standard requires approval by at least 75 % of the national bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO and IEC shall not be held responsible for identifying any or al
16、l such patent rights. ISO/IEC 19794-11 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 37, Biometrics. ISO/IEC 19794 consists of the following parts, under the general title Information technology Biometric data interchange formats: Part 1: Framework
17、Part 2: Finger minutiae data Part 3: Finger pattern spectral data Part 4: Finger image data Part 5: Face image data Part 6: Iris image data Part 7: Signature/sign time series data Part 8: Finger pattern skeletal data Part 9: Vascular image data Part 10: Hand geometry silhouette data Part 11: Signatu
18、re/sign processed dynamic data Part 13: Voice data Part 14: DNA data ISO/IEC 19794-11:2013(E) ISO/IEC 2013 All rights reserved vIntroduction There are several commercial implementations of signature/sign verification based on the analysis of the dynamic features of signing. This part of ISO/IEC 1979
19、4 specifies an interchange format using signature/sign dynamic features that can be used to provide signature/sign verification. This data format enables interoperability without compromising any developers Intellectual Property Rights. A group of features are identified that are mandatory across al
20、l compliant implementations in order to ensure interoperability but the biometric interchange record format also supports proprietary data. The use of proprietary data is regulated in a similar manner to that used in ISO/IEC 19794-7, ensuring that comparable performance is achieved between the manda
21、tory and proprietary features. The features recorded represent significant dynamic events during the signing process, and thus represent an intelligent compression of the ISO/IEC 19794-7 format. From these other features can be calculated or estimated. Furthermore, using the significant events 19794
22、-7 format can be extrapolated, and therefore other signature/sign feature data can be calculated or estimated. The biometric interchange record format is a sequence of signature/sign representations, preceded by a general header that is common to all representations. Each signature/sign representati
23、on is recorded as a representation header followed by a sequence of Dynamic-event data for each signature/sign dynamic event. In addition to the Dynamic-event data recorded for each signature/sign dynamic event, additional data is recorded representing overall features of the signature/sign represen
24、tation. It should be noted that all recorded data for the signature/sign representation is recorded before any transformations are applied (e.g. rotation or time warping). The data recorded is either raw data or derived from the raw data. This part of ISO/IEC 19794 does not specify the analysis to b
25、e undertaken by any particular comparison algorithms. The signature/sign features recorded in the data format can be used for analysis by many different comparison algorithms. The format described is based on features (segmentation based on dynamic events) instead of sample points as described in IS
26、O/IEC 19794-7. The format defined in this part of ISO/IEC 19794 has the version number 1.0. Annex A is normative and is intended to specify elements of conformance testing methodology, test assertions, and and test procedures ass applicable to this part of ISO/IEC 19794. Annex B is informative and f
27、ormally specifies the biometric interchange record format using the ASN.1 (see ISO/IEC 8824) notation and the ASN.1 Packed Encoding Rules (see ISO/IEC 8825-2), enabling the use of ASN.1 tools to assist implementation. Annex C is informative. It gives guidance on the suitability of signature/sign for
28、 secure comparison purposes using the features recorded in the biometric interchange record format defined in this part of ISO/IEC 19794. Annex C identifies three indicators of signature/sign suitability: quantity of data, complexity of signature/sign, and consistency of signature/sign. Annex C sugg
29、ests measurements that can be made in accessing these indicators, but does not quantify suitable measurements or provide any structure for recording the indicators. INTERNATIONAL STANDARD ISO/IEC 19794-11:2013(E) ISO/IEC 2013 All rights reserved 1Information technology Biometric data interchange for
30、mats Part 11: Signature/sign processed dynamic data 1 Scope For the purpose of biometric comparison, this part of ISO/IEC 19794 specifies a data interchange format for processed signature/sign behavioural data extracted from a time series, captured using devices such as digitizing tablets, pen-based
31、 computing devices, or advanced pen systems. The data interchange format is generic, in that it may be applied and used in a wide range of application areas where handwritten signs or signature/signs are involved. No application-specific requirements or features are addressed in this part of ISO/IEC
32、 19794. This part of ISO/IEC 19794 contains definitions of relevant terms, a description of what data is extracted, and a data format for containing the data, together with advice on whether a set of users signature/sign is suitable for identification purposes using this part of ISO/IEC 19794. It is
33、 advisable that stored and transmitted biometric data is time-stamped and that cryptographic techniques be used to protect their authenticity, integrity, and confidentiality; however, such provisions are beyond the scope of this part of ISO/IEC 19794. 2 Conformance A biometric data record conforms t
34、o this part of ISO/IEC 19794 if it satisfies all of the normative requirements related to: A) Its data structure, data values and the relationships between its data elements, as specified in Clause 8 of this part of ISO/IEC 19794. B) The relationship between its data values and the input biometric d
35、ata from which the biometric data record was generated, as specified in Clause 8 of this part of ISO/IEC 19794. A system that produces biometric data records is conformant to this part of ISO/IEC 19794 if all biometric data records that it outputs conform to this part of ISO/IEC 19794 (as defined ab
36、ove). A system does not need to be capable of producing biometric data records that cover all possible aspects of this part of ISO/IEC 19794, but only those that are claimed to be supported by the system. A system that uses biometric data records is conformant to this part of ISO/IEC 19794 if it can
37、 read, and use for the purpose intended by that system, all biometric data records that conform to this part of ISO/IEC 19794 (as defined above). A system does not need to be capable of using biometric data records that cover all possible aspects of this part of ISO/IEC 19794, but only those that ar
38、e claimed to be supported by the system. ISO/IEC 19794-11:2013(E) 2 ISO/IEC 2013 All rights reserved3 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the late
39、st edition of the referenced document (including any amendments) applies. ISO/IEC 19785-2, Information technology Common Biometric Exchange Formats Framework Part 2: Procedures for the operation of the Biometric Registration Authority ISO/IEC 19794-1, Information technology Biometric data interchang
40、e formats Part 1: Framework 4 Terms and definitions For the purposes of this document the terms and definitions given in ISO/IEC 19794-1 and the following apply. 4.1 dynamic event either a pen-up, pen-down, or turning point event 4.2 pen-down event from which on the pen tip is touching the writing p
41、lane 4.3 dynamic-event data data that records pen position, pressure and time for a given signature/sign dynamic event 4.4 pen-up event from which on the pen tip is not touching the writing plane, after a pen-down event 4.5 signature/sign representation data recorded from a single signature/sign NOT
42、E A signature/sign representation always starts with a pen-down event and ends with a pen-up event, but there can be more pen-up and pen-down events within the signature/sign representation. 4.6 turning point event from which the sign of the inclination derived from adjacent samples of either X, Y o
43、r F channel changes 5 Conventions 5.1 Coordinate system The coordinate system used to express the pen position shall be a two-dimensional Cartesian coordinate system. The x-axis shall be the horizontal axis of the writing plane, with the x coordinates increasing to the right starting at 0. The y-axi
44、s shall be the vertical axis of the writing plane, with y coordinates increasing upwards starting at 0. 5.2 Byte order The more significant bytes of any multi-byte quantity are stored at lower addresses in memory than (and are transmitted before) less significant bytes. ISO/IEC 19794-11:2013(E) ISO/
45、IEC 2013 All rights reserved 3Within a byte, the bits are numbered from 8 to 1, where bit 8 is the most significant bit (MSB) and bit 1 the least significant bit (LSB). 5.3 Registered format type identifier The data records specified in this part of ISO/IEC 19794 may be embedded in a CBEFF- (ISO/IEC
46、 19785-1) compliant biometric information record (BIR). This clause lists the BDB (biometric data block) format owner identifier and the BDB format type identifier that shall be used if embedded in a CBEFF BIR. This identifier is registered with IBIA, the CBEFF Registration Authority (see ISO/IEC 19
47、785-2). The format owner of the formats defined in ISO/IEC 19794 is ISO/IEC JTC 1/SC 37. The format owner identifier is 257 (0101Hex). Table 1 lists the format type identifier for the format defined in this part of ISO/IEC 19794. Table 1 Format type identifiers CBEFF BDB format type identifier Short
48、 name Full object identifier 16 (0010Hex) signature-sign-processed-dynamic iso(1) registration-authority(1) cbeff(19785) biometric-organization(0) jtc1-sc37(257) bdbs(0) signature-sign-processed-dynamic(16) 6 Data format relationships The processed data format described in this part of ISO/IEC 19794
49、 may not be the final format used by dynamic signature/sign analysis algorithms for signature/sign feature analysis. The format is a segmentation based signature data format with sufficient information to derive signature/sign features for a variety of algorithms. Its use is shown in the flowchart in Figure 1. sign/signature data Signature/sign feature analysisInternal feature data 19794-11 stored dataInte
