Doc 9303第七版代表了国际民航组织机器可读旅行规范的重组 文件。在没有对规范进行实质性修改的情况下，新版Doc 9303已重新格式化为一号机读公务旅行证件（TD1）、二号机读公务旅行证件（TD2）和三号机读旅行证件（TD3）以及签证的一套规范。这套规范由各种单独的文件组成，其中包括通用规范（适用于所有MRTD）和MRTD形状系数特定规范。本部分规定了签发旅行证件应采取的预防措施的强制性和可选规范 当局应确保其MRTDs及其个性化和向合法持有人发放的方式 防止欺诈性攻击。 对于生产、个性化和发布MRTD的场所的物理安全，以及对参与这些操作的人员的审查，还提供了强制性和可选规范。世界范围内旅行人数的增加和预期的持续增长，以及国际犯罪、恐怖主义和非法移民的增长，导致人们越来越担心旅行证件的安全问题，并呼吁就如何帮助他们提高抵抗攻击或滥用的能力提出建议。从历史上看，Doc 9303并未就旅行中应包含的具体安全功能提出建议 文件。每个发行国都可以自由纳入其认为适当的保障措施，以保护其自身利益 国家发行的旅行证件，只要不存在伪造、伪造和其他形式的攻击 这将对OCR机器的可读性产生不利影响。为了满足提高文件安全性的需要，国际民航组织的技术顾问决定，最好公布一套“建议的最低安全标准”，作为所有签发机器可读旅行证件的国家的指南。因此，本部分附录A描述了在MRTD结构内采取的安全措施，以及 生产该产品的场所；附录B描述了实现机器辅助文件验证的可选方法；附录C描述了为确保个性化设置的安全性而采取的安全措施 运输过程中文件的操作和维护。

The Seventh Edition of Doc 9303 represents a restructuring of the ICAO specifications for Machine Readable Travel Documents. Without incorporating substantial modifications to the specifications, in this new edition Doc 9303 has been reformatted into a set of specifications for Size 1 Machine Readable Official Travel Documents (TD1), Size 2 Machine Readable Official Travel Documents (TD2), and Size 3 Machine Readable Travel Documents (TD3), as well as visas.This set of specifications consists of various separate documents in which general (applicable to all MRTDs) as well as MRTD form factor specific specifications are grouped.This Part provides mandatory and optional specifications for the precautions to be taken by travel document issuing authorities to ensure that their MRTDs, and their means of personalization and issuance to the rightful holders, are secure against fraudulent attack. Mandatory and optional specifications are also provided for the physical security to be provided at the premises where the MRTDs are produced, personalized and issued and for the vetting of personnel involved in these operations.The worldwide increase in the number of people travelling and the expected continued growth, together with the growth in international crime, terrorism and illegal immigration have led to increasing concerns over the security of travel documents and calls for recommendations on what may be done to help improve their resistance to attack or misuse.Historically, Doc 9303 has not made recommendations on the specific security features to be incorporated in travel documents. Each issuing State has been free to incorporate such safeguards as it deemed appropriate to protect its nationally issued travel documents against counterfeiting, forgery and other forms of attack, as long as nothing was included which would adversely affect their OCR machine readability.To meet the need of increased document security, ICAO's technical advisors decided it would be desirable to publish a set of "recommended minimum security standards" as a guideline for all States issuing machine readable travel documents. Thus,Appendix A to this Part describes security measures to be taken within the structure of the MRTD and of the premises in which it is produced;Appendix B describes optional means of achieving machine-assisted document verification;Appendix C describes the security measures to be taken to ensure the security of the personalization operations and of the documents in transit.