IndianWebs offers you to prevent possible vulnerabilities in our company's server, MD5 which is an effective measure to encrypt passwords. Encrypt passwords with md5, if in our company we have a user system and we want to protect the passwords to prevent possible vulnerabilities in our server, it is an effective measure to encrypt the passwords, so that if someone can access them they cannot see the password if not its encryption. To improve this system, what we will do is use a one-way encryption algorithm, meaning that it cannot be decrypted in any way, such as md5. Something important to remember: MD5 is only a one-way algorithm, which means that we cannot decrypt the content once encrypted and the validation must be done in MD5, that is, we have to convert the two strings to MD5 and only then perform the validation. As the encrypted password is stored in the database, when a user wants to access, a comparison will have to be made between the password they enter encrypted in MD5, and what we have in the database, (which is the password encrypted in MD5 ), if it matches, access is allowed, if not, it is rejected. MD5 is also used so that when a user forgets their password, if they want to recover the password, they are asked to enter, for example, the email, and an email is sent to them with a URL such that if they enter it, a new password will be generated that will be sent to them. indicates the user and is rewritten to md5 in the database (deleting the previous password).