What is code signature?

Hackers often take the software - whether offline or online - regroup and change the code to be malicious, and then upload it online so that users download the free program and the malicious code it contains. To ensure that users do not reach this problem, the code signature is used. Code signing is a method by which the original programmer or company that created the program to sign the program, and when the program is installed, it is verified to ensure that the program is not added or changed encoding. This requires no special software on the user's side and the user is able to verify the identity of the programmer. Although it is determined as a form of security, a hacker that creates a program or finds around a signature, can create artificial and incorrect confidence.

Programs are constantly sold online and offline. When someone buys an offline program from a trusted supplier or seller, the user has a very little reason to worry that hackers inject a malicious code into the program. This is because if the software developer has intentionally created a dangerous program, there is no way to manipulate software and make it harmful. When the user downloads the program from the Internet, there is no such warranty.

For protection of users who buy or download online programs, the code signature is implemented. The code signature is divided into two parts: developer and end user. The developer uses a cryptographic hash, a one -way surgery that masks the program code, and then combines its private key with hash. This creates a signature that is implanted in the program.

When the user receives the program, the second part of the code signature will occur. The program examines the certificate and the public key that the programmer placed in the program. Using a public key, the program is able to run the same hashactal programming and then checks the original version of the current version. AsThe installed program, so the original synchronization, shows the user that nothing has been changed. This process is carried out automatically and the programs needed for this verification should be pre -installed on the computer operating system (OS).

While the code signature is a powerful security method, it has shortcomings. If the user downloads the program from the hacker, then the verification will show that the original program is intact. This would lead the user to a false sense of security; The program is made to be harmful, so security is not achieved in this sense. Sophisticated hackers can also bypass hash to insert encoding and portray the signing of the code unnecessary.