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Windows CardSpace (formerly known as InfoCard) is a technology from Microsoft, which was added to the .NET Framework.
It is a digital identity management system, whose purpose is to provide users with a secure and easy way to manage their online identity.
It was included in .NET Framework 3.0 and later versions.

Windows CardSpace was a wonderful identity management solution that prioritized user security and convenience.
However, its use was discontinued due to its limited adoption. Even today, its principles are used in other modern identity management technologies.

Purpose of Windows CardSpace:

The main purpose of Windows CardSpace is to provide security when sharing a user's personal information and sensitive data online. It was created to reduce threats like "phishing attacks" and password theft.

Main features:

Digital Cards: Allows the user to use digital cards for identity management. These cards are virtual and store the user's information securely.
Security: It encrypts the user's information and protects it from unauthorized use.
Interoperability: It can work with different platforms and services, which allows users to easily use their identity in different applications.
Easy to use: Users do not need to remember passwords again and again. With the help of digital cards, login can be done with just one click.

How does Windows CardSpace work?

The working of Windows CardSpace takes place in the following steps:

Creating a digital card: The user creates a digital card for their identity. This card securely stores personal information such as name, email, phone number, etc.
Service Request: When the user logs in to a website or service, that service (Service Provider) requests identity.
Selection of card: The user logs in to the Windows CardSpace interface and selects the appropriate digital card.
Sharing of information: The necessary information from the user's digital card is shared with the service provider, that too in encrypted form.
Verification: The service provider verifies this information and provides access to the user.

Advantages of Windows CardSpace

Increases security: The user's personal information is in encrypted form.
Convenient: No need to type passwords again and again.
Reliability: The service provider can verify the user's identity.
Protection from phishing: This helps in preventing phishing attacks because the user does not type their information directly on the website.

Where can Windows CardSpace be used?

Why was Windows CardSpace discontinued?

In 2011, Microsoft ended support for Windows CardSpace.
The main reason for this was that this technology was very complex and the number of users who adopted it was very low.
In its place, Microsoft developed new and simpler identity management solutions, such as Azure Active Directory.