Migrate old md5 passwords to bcrypt passwords

Question

I\'m reworking a website in Rails using Devise for authentication. The previous website works with a database of users with md5 passwords, and therefore I want to migrate th

Answer 1

You will have to ask the user to login using the old password and then change it for example show a compulsory change password page which will store the password using bcrypt. Once the new password is given you could disable/delete the old password in you system.