Precautions when purchasing source code encryption software!

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When purchasing source code security encryption products for large source code development enterprises, it is recommended to select enterprise-level source code encryption software according to the following steps and precautions.

1. In-depth drive encryption technology and security technology

　　Enterprise -level source code encryption software has two different technical routes: driver layer technology and application layer technology. Although the application layer Hook method is relatively simple to implement, it is a transitional technology and has entered the phase of elimination. The current mainstream technology is the driver layer technology. Version support will be different accordingly. Some manufacturers of driver layer technology have launched versions that can support Windows Vista.



2. Source code encryption key and algorithm

　　In terms of encryption algorithm, which encryption algorithm to use is not the point. But in terms of key handling, generally speaking, key lengths below 64 bits are not desirable. For civilian use, both 128-bit and 256-bit lengths are sufficient. It should be noted that the longer the key length, the greater the amount of computation, and the more computing resources (including machine performance and time) are consumed. Custody of keys is also a key issue, including key generation, transmission and backup.



3. The basic functions of source code encryption software

　　mainly include renaming of applications, file renaming, file type replacement, cutting, copying, pasting, linking and embedding of objects, dragging and dropping of document content, screen copy control, screen capture and print control and other basic functions are common. At present, most mature products have effectively achieved the above functions.



4. Source code encryption software for USB port management

　　In theory, this is not necessary. Because the file itself is encrypted, there is no fear of being leaked to the outside. But according to the theory of layered information security architecture, these functions are necessary.



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5. Control of source code encrypted file types

　　This is a requirement for hierarchical protection of documents. At present, encryption software usually enforces encryption for file types, but non-encrypted files of the same file type are also forced to be encrypted, which is usually unsatisfactory for users. Because all the same file types are encrypted, it will inevitably lead to reduced efficiency. The source code encryption products mainly based on environmental encryption do not distinguish between file types, and can encrypt files in any format, effectively matching the output ratio in the software development process.



6. Efficiency of source code encryption and decryption

　　Efficiency and security are often a pair of opposite quantities, and a reasonable balance should be found during the period. In applications such as 3D CAD, CAE, graphic image production, etc., some files are very large. If dynamic encryption and decryption cannot be well supported, it may greatly affect the user's operational efficiency. time is too long.



7. Automatic backup of source code

files backup is a necessary function and a targeted security measure against system risks. When examining file backups, you should pay attention to whether the load on the network and machine during backup will be very large, how to reduce or distribute this load over time, how to easily retrieve a large number of backup copies in the future, and how much the same file can be retained. copies, etc.



8. Source code encryption client management

　　It mainly includes the policy issuance to the client during implementation, and how to ensure the management of the offline client after the client leaves the server segment and connection.

9. The problem of clear text export of source code

　　Encrypted files can only be used in a local area. Once the business needs and it is really necessary to send the files to the outside world, the plaintext must be decrypted into plaintext. At this time, most manufacturers use special approval and decryption processes to control. There are also emails sent to the designated e-mail, and the encrypted attachment files in the email are automatically decrypted. This feature is known as "clear text recipients" or "mail whitelisting", etc.



10. Integration capability of source code encryption and management system Although the

　　encryption system can be self-contained, it will inevitably have problems of integration and cooperation with other management systems. It is necessary to examine whether it can be effectively combined with various authentication systems such as AD domain and ED domain, as well as integration with ERP, CRM, and PDM/PLM systems.



11. Temporary files and "pseudo-encryption" in source code encryption

　　Many application software will generate temporary files when editing data files. These temporary files are deleted after the corresponding data files are closed normally. Since these temporary files also store confidential corporate data, the protection of these temporary files is also very important.

　　Some companies often use "pseudo-encryption" practices: ①Using Hook technology to intercept the program's opening operation of files; ②Secretly decrypt the opened file to a "secret" place; ③In the background, point the application's operation pointer to the data file The plaintext in the "secret" place; ④When closing the data file, encrypt the hidden plaintext and replace the original file. This design makes it seem that users can open and edit the ciphertext, and the ciphertext obtained after editing and saving is still the ciphertext. But actually the object actually edited by the application software is an unencrypted plaintext file. That "secret place" is actually pretty easy to spot. If the User of the trusted node knows this "secret place", he can go to that "secret place" to obtain the plaintext when opening the ciphertext.



12. Disaster recovery management of source code encryption system What will happen if the

　　server goes down and the network fails? How does the system respond to this risk? System disaster tolerance is an important indicator for examining products. It cannot be assumed that all systems will operate normally, especially when pirated software is widely used in China.



13. Ease of use of source code encryption software

Whether the software installation, upgrade, configuration, user authority setting, log recording and statistics, decryption machine and other modules are easy to use in detail, and whether it effectively cooperates with the company's business process and file management process. Reasonable management, not only will not increase the trouble of use, on the contrary, it will improve the speed of document circulation and improve work efficiency.

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