关键词: 消隐数字签名;VRML;加密;数字信封;数字证书

Abstract:

To cater for the special security requirement for the transmission of product design documents in network-based manufacturing systems, a secure scheme is proposed based on PKI. The scheme adopts symmetric encryption technology to assure the efficiency of the encryption and decryption of the design drawing, and realize the safe transmission of the symmetric key among multiple users by data-envelop technology; the sanitizable digital signature technology is used to documents in VRML format and the authentication of partial file is realized without the whole file being demonstrated, which solves the contradiction between invisibility and integrity. System based on B/S mode and the general VRML format has a good adaptability and cross-platform.

Key words: sanitizable digital signature;VRML;encryption;data-envelop;digital certificate