### Netflix Login$/$Sign$-$Up Process: A Step$-$by$-$Step Breakdown Including Household Validation and Password Sharing Restrictions

Netflix's login or sign$-$up process is a multi$-$step interaction that involves input from both the user and Netflix's system. With the recent introduction of password$-$sharing restrictions, Netflix now tracks the household from which users access the service. This requires additional validation steps to ensure that users are accessing the account from the primary household or are otherwise authorized. We will detail both the $**$login$**$ and $**$sign$-$up$**$ flows, taking into account all possibilities, including incorrect input, password reset options, and restrictions related to household validation.

The following steps cover the full process from login and sign$-$up to handling password$-$sharing restrictions, including household validation. There are two swim lanes in the activity diagram: one for the $**$User$**$ and one for the $**$Netflix System$**.$

### $1.$ Access Netflix Interface

The process begins when the user accesses the Netflix interface through a website, mobile app, or smart TV$.$ Users are presented with two primary options:

$-**$Log in$**$: For existing users who have an account.

$-**$Sign up$**$: For new users who want to create a new account.

$**$User action$**$: Navigate to the Netflix login$/$sign$-$up page.

$**$System action$**$: Display the login$/$sign$-$up screen.

### $2.$ Decision Point: Existing User or New User

At this point, the user must choose whether to log in or sign up:

$-$ If the user has an existing account, they will proceed to the $**$login$**$ flow.

$-$ If the user is new, they will proceed to the $**$sign$-$up$**$ flow.

### $3.$ Login Process for Existing Users

For users who select $**$log in$**,$ the following steps occur:

#### Step $1$: Enter Email and Password

The user is prompted to input their email address and password to access their Netflix account.

$**$User action$**$: Input email and password.

$**$System action$**$: Capture the provided credentials and send them to the server for validation.

#### Step $2$: Validate Credentials

The Netflix system verifies the provided credentials. This involves checking whether the email and password match an existing account in Netflix$$s system.

$-$ If the credentials are correct, the system moves on to an additional check to determine whether the user is logging in from their designated household.

$-$ If the credentials are incorrect, an error message is displayed, asking the user to try again or reset their password.

$**$User action $($in case of failure$)**$: Re$-$enter credentials or select the "Forgot password" option to reset the password.

$**$System action $($in case of success$)**$: Authenticate the user and proceed to household validation.

### $4.$ Household Validation Process

Once the user's credentials are validated, Netflix checks whether the login is occurring from the primary household associated with the account. This is a key step in Netflix's efforts to curb password sharing. The primary household is usually set when the account holder logs in from their home network $($typically their home Wi$-$Fi$).$ Netflix tracks this household using the IP address and device data.

#### Step $1$: Determine if Login Is from the Primary Household

Netflix checks whether the login attempt originates from the IP address and device information associated with the primary household.

$-**$If the login is from the primary household$**$: The system grants access and redirects the user to the Netflix dashboard.

$-**$If the login is from a different location$**$: The system flags the login attempt as being from a non$-$household location and prompts the user for additional verification.

$**$System action$**$: Compare the login location $($IP address, device ID$)$ to the saved household details.

#### Step $2$: Prompt for Household Confirmation $($If Login Is Flagged$)$

If the login attempt is flagged as occurring outside the household, Netflix prompts the user to confirm their access. There are several ways Netflix can handle this:

$-**$Email or SMS Verification$**$: The system may send a verification code to the account holder$$s registered email or phone number. The user must enter this code to continue accessing the account.

$-**$Temporary Access$**$: Netflix might allow the user to request temporary access $($e$.$g$.,$ a $7-$day pass$)$ for non$-$household logins$,$ especially for users who are traveling.

$**$User action$**$: Enter the verification code sent by Netflix or request temporary access.

$**$System action$**$: Send the verification code and await user input or grant temporary access.

#### Step $3$: Confirm Access

Once the user enters the verification code or requests temporary access, the system confirms access for a limited time, or it may prompt the user to add the new location as an authorized household for an additional fee.

$-**$If access is granted$**$: The user proceeds to the Netflix dashboard.

$-**$If access is denied$**$: The user must