| M | md5 Encryption is irreversible How to save user password? Then if the user does n’t remember how we got it back

雕像五代

Just watched a post about MD5 encryption
I also know that md5 encryption is irreversible
Then I feel like there is no place to use MD5.
I generally use DES encryption
Where is MD5 used?
How to save user password?
Then if the user does n’t remember how we got it back

liyaoxing

MD5 encryption is a relatively common encryption method for user passwords, which is of course irreversible. If the user forgets the password, the user can reset the password by prompting the question through the password.

lisongfox

You can send a random password to the user's email.

雕像五代

liyaoxing
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md5 encryption is irreversible
Then how to get the user's password (the user's password has been MD5 encrypted)

shenmue024

The password does not have to be decrypted.

My passwords are all added using md5.

Just compare the encrypted string when logging in.

Retrieving your password is actually resetting it. Let the user reset one.

5954979

md5 is generally used for digital signatures, not encryption

For example, if A sends a document to B, then according to md5, it can be determined whether the document has been tampered with during the sending process, and it can also prevent non-repudiation. Like cab signature you can choose md5

If md5 is used for encryption, this is the situation that Brother Mu Bai said.

jetzzz

update tableName set skey = @ skey where answer = @ Password prompt question.

雕像五代

Oh. .
In other words, when MD5 did the password, the original password could not be recovered.
Must be reset yes

shenmue024

In other words, when MD5 did the password, the original password could not be recovered.
Must be reset yes
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Yes.

sabs_nn

Asshenmue024said, at this time, you can only randomly generate a password and encrypt it with md5 to change the user's password.