A step-by-step guide to integrating cloud computing and creating tokens using PHP

I am looking to create a cloud computing project using PHP. The main goal of this project is for users to store their files on a cloud server and if any unauthorized manipulations occur, the system should be able to detect and correct them. My question is how can I implement this in PHP?

The research paper suggests generating tokens for each file stored on the server, which can then be used during detection to verify integrity.

I have not yet incorporated socket programming into my project. Any suggestions on how to proceed would be appreciated.

phpsocketscloudprojecttoken

Answer №1

To ensure the integrity of a file, it is recommended to create a hash copy of the file.

$file = "name.doc";
$md5 = md5_file($file);
$sha1 = sha1_file($file);

Store each hash in a database along with the file name and compare it every time you need to verify or retrieve the file. This way, you can easily detect any unauthorized modifications.

For added security, consider automatically replacing the file by saving a backup copy on a CDN hosting and only retrieving it if the original has been altered.

While using the last modification date is an option, it can be manipulated.

Let me know if you find this information helpful!

Thank you! :)

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