To enable a password-based authentication of users, it has been decided to use one of the...

Question

Question

To enable a password-based authentication of users, it has been decided to use one of the following two approaches to store password information:

1. Store user name U_name next to the hash SHA-512 (password_u) of the user password, using the hash function SHA-512.

2. Store the user name U_name along with a 64-bit random value r_u and SHA-224 (passwordd_u{2 vertical lines}r_u) using SHA -224.

Which approach is preferable and why?

engineering Computer-Science

Answer 1

Similar Homework Help Questions

COSC 359 User Authentication Description A widely used password security technique is the use of hashed...

COSC 359 User Authentication Description A widely used password security technique is the use of hashed passwords and a salt value. This scheme is found on virtually all UNIX variants as well as on a number of other operating systems as shown in Figure 3.1 bellow. To load a new password into the system, the user selects or is assigned a password. This password is combined with a fixed-length salt value. In older implementations, this value is related to the...
CASE 8 Unlocking the Secrets of the Apple iPhone in the Name of access the male...

CASE 8 Unlocking the Secrets of the Apple iPhone in the Name of access the male San Bernardino suspect's iPhone 5c. Cook stated: Antiterrorism We are challenging the FBI's demands with the deepes respect for American democracy and a love of our country. We believe it would be in the best interest of everyone to step back and consider the implications While we believe the FBI's intentions are good, if would be wrong for the w e nt to force...