Encryption and decryption method for remote bid opening type bidding system

Abstract

The invention relates to an encryption and decryption method for a remote bid opening type bidding system. The method comprises an encryption process and a decryption process. In the encryption process, a bidding file is encrypted using an encryption and decryption key. In the decryption process, the bidding file is decrypted using the encryption and decryption key. The generation process of an encryption and decryption key includes the following steps: calculation is carried out on an original bidding file or an encrypted bidding file according to a predetermined algorithm to get an original character string; and then, the original character string is encrypted through a bidder digital certificate encryption public key, thus getting an encryption and decryption key. Through the method, the safety is ensured while remote bid opening is realized.

Description

technical field [0001] The invention relates to an encryption and decryption method for a bidding system, in particular to an encryption and decryption method for a remote bid opening type bidding system, and belongs to the technical field of Internet-based bidding applications. Background technique [0002] In order to standardize electronic bidding activities and promote the healthy development of electronic bidding, eight ministries including the National Development and Reform Commission and the Ministry of Industry and Information Technology jointly formulated the "Electronic Bidding Measures", which have been implemented since May 1, 2013. The method clearly stipulates that bidders must encrypt and upload their own bidding documents and prequalification application documents, and bidders and tenderees must decrypt the documents online when opening bids. [0003] Preliminary research found that with the currently widely used encryption and decryption technology, bidders...

AI Technical Summary

Problems solved by technology

[0007] (1) If the encryption and decryption of bidding documents is simply to use a symmetric algorithm, although it can have a faster encryption and decryption speed, but the degree of information security is insufficient, it is easy to cause information leakage or even be cracked

[0008] (2) If the encryption and decryption of bidding documents is simply using an asymmetric algorithm, although it can improve the degree of information security, it not only has the problem of slow encryption and decryption speed, but also requires the user to provide a private key on site for decryption, which makes it impossible to realize remote encryption and decryption. Bid opening problem

[0009] (3) Due to the particularity and sensitivity of the bidding work, there are indeed situations in the actual work where the information leakage of the bidding unit leads to disputes and even judicial litigation. Logically, such information leakage may be caused by the relevant handling personnel of the bidding unit, The security defect of the information bidding system is breached, the operation and maintenance personnel of the information bidding system steal information from the system, or other reasons

[0015] However, the disadvantages of this technical solution are: (1) When opening bids, all parties need to import their private key certificates into the electronic bidding server. The subject must visit the site in person, and remote opening of bids cannot be realized; (2) Each subject must repeat the "digital envelope encryption technology" when encrypting with its public key, that is, the symmetric key encrypts the tender document, and encrypts the symmetric key with the public key , which not only makes the encryption process cumbersome, but also seriously affects the decryption efficiency; (3) The digital envelope encryption and decryption technology uses a pre-set symmetric key, but does not use any security guarantee for the generation of the key (4) In order to improve the decryption efficiency, only the header of the electronic bidding document is encrypted. However, the security requirements of remote bidding opening are much higher than that of on-site bidding, and this technical method is difficult to meet the security requirements of remote bidding opening

Images