ASME Y14.42:2002 pdf free download

ASME Y14.42:2002 pdf free download.DIGITAI APPROVAL SYSTEMS.
ASME Y14.42 provides the minimum requirements for the development of a digital approval system for engineering documentation.
1.2 References
When the following American National Standards referred to in this Standard are superceded by a revision approved by the American National Standards Institute, Inc., the revision shall apply.
ASME Y14.1, Decimal Inch Drawing Sheet Size and Format
ASME Y14.IM, Metric Drawing Sheet Size and Format ASME Y14.35M, Revision of Engineering Drawings and Associated Documents
ASME Y14. 100, Engineering Drawing Practices Publisher: The American Society of Mechanical Engineers (ASME International), Three Park Avenue, New York, NY 10016-5’190; Order Department: 22 Law Drive, Box 2300, Fairfield, NJ 07007-2300
1.3 Definitions
approval indicator: any symbol adopted by the design activity to indicate approval.
associated documents: general reference to documentation supportive of and directly related to drawing content. such as Parts lists, Data Lists, Index Lists, Wiring lists, and Application Lists (see ASME Y14.35M).
authentication: the process of verifying the claimed identity of a document’s author and approver(s).
biometrics: the use of biological properties to identify individuals, e.g., finger prints, a retina scan, voice recognition, etc.
a string of bits used widely in cryptography, to encrypt and decrypt data.
digital signslture: a person’s signature transmitted in a coded form (from a computer) by discrete signal elements such that the identity of the signatory and integrity of the data can be verified.
2.1.3 Manual Drawings. Manually prepared and approved drawings and associated documents may be exempt from the requirements of this Standard. When manually prepared and approved drawings are converted to digital file formats, the use of a digital approval indicator should be considered for future revisions.
2.1.4 PrIntouts of Digital Documents. Hard copy printouts of digital drawings shall contain dated indication that the document has been approved.
2.1.5 DigItal Copies of Digital Documents. When approval indicators reside in s arate documents and are hyperlinked to the digital drawing, the approval indicators shall be affixed to the digital copy of the document.
2.2 Authentication and Verification of Approval Indicators
Authentication applies to the validation of the approval indicator. Verification of an approval indicator applies to the validation of the approval process.
2.2.1 Authentication. A system of authentication shall be developed to ensure the accuracy of the approval indicator. The authentication of an approval indicator is the process that validates the unique association of the owner of the indicator to the indicator. Methods for user authentication may be extended to provide approval indicators by combining them with cryptographic techniques of various kinds. Examples of technologies that have been developed for user authentication include:
password systems, cryptographic systems, and biometrics identification methods.
2.2.2 Verification. Approval indicator verification is a process whereby all users of a document are assured that an authentic approval indicator has been used. In general, the document, the approval indicator, and other information, such as cryptographic keys or biometrics templates, may be used.
2.3 Security
The digital approval system shall be protected with a security system that protects both the system and the data within the system from unauthorized access or modification.
2.3.1 Integrity. The digital approval system shall identify valid approvals of the data. The approval indicator shall not be applied without authorization. The system shall also identify what is approved. Alteration of either the approved document or the approval indicator should be detectable by the digital approval system.