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Knowledge Hub

May 11, 2023

Revolutionizing Data Sharing with SSI and Zero-Knowledge Proofs

Self-Sovereign Identity (SSI) and Zero-Knowledge Proofs (ZKPs) are two powerful technologies that, when combined, can dramatically change the way we share and control our data online. Let’s explore how these concepts work together to revolutionize data sharing and provide you with enhanced privacy and data protection.

Self Sovereign Identity (SSI) is a decentralized approach to managing digital identities that allows you to own, control, and share your personal information independently. With SSI, you no longer need to rely on third-party providers like Facebook or Google to store and manage your data.

Zero-Knowledge Proof (ZKP) is a cryptographic technique that allows you to prove that you have specific information without revealing it. It’s like showing someone that you have a key to a lock without actually handing them the key. ZKPs can be used with SSI to share only the necessary data required for a transaction without exposing the actual data itself.

The most straightforward example would be proving your age with ZKP. Imagine you want to access an online service requiring users to be 18 years old. Instead of providing your date of birth with a government-issued ID containing your photo, full name, place of birth, and ID number, you can use a Zero-Knowledge Proof to demonstrate that you meet the age requirement without revealing any additional information.

Zero-Knowledge Proof for proving your age works as follows:

1. You need the identity wallet with ZKP functionality.A government or an identity provider (trusted authority) issues you a digital credential with your birth date. This credential is cryptographically signed to ensure its authenticity.

2. Using a Zero-Knowledge Proof algorithm, you create a “proof” in the ZKP-enabled wallet that confirms you are at least 18 years old based on the digital credential you received. The algorithm generates this proof without revealing your exact date of birth or any other personal details.

3. You submit the proof to the online service, which then verifies the proof using the same ZKP algorithm. If the proof is valid, the service confirms that you meet the age requirement and grants access.

4. Throughout this process, your exact date of birth remains undisclosed. The online service only receives proof that you are at least 18 years old, ensuring your privacy is maintained.

When SSI and ZKPs are combined, you gain several key benefits:

1. Selective Data Sharing

You can share specific data attributes (e.g., prove your age) without revealing the rest of your personal information. This selective information sharing reduces the risk of identity theft.

2. Privacy Preservation

Using ZKPs, you can prove your eligibility for a service (e.g., access to age-restricted services) without revealing your exact age or other sensitive information. This helps preserve your privacy and protect your data from potential misuse.

3. Enhanced Trust

Both SSI and ZKPs use cryptographic techniques to ensure the authenticity of your digital credentials, making it simple for others to trust the information you provide. This fosters a more trustworthy digital environment and streamlines various processes.

4. Increased Control

With SSI and ZKPs, you have full control over your data and can decide what information to share and with whom, without the need for an intermediary. This enables you to own your data and protect your privacy.

5. Streamlined Processes

Combining SSI and ZKPs can simplify various processes, such as identity verification or access control, dramatically increasing efficiency in the digital world interactions and security.

The fusion of Self-Sovereign Identity and Zero-Knowledge Proofs offers a powerful solution for enhanced privacy, data protection, and control in the digital world.

By embracing these technologies, we can revolutionize how we share and manage our data, paving the way for a more secure, private, and efficient digital experience.

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