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Each year, data theft costs more than 3000 billion dollars to the world economy because of vulnerable centralized databases.

In order to fight against it, XSL Labs offers a fully Decentralized Identifier, called Secure Digital Identity. With Blockchain technology allowing its decentralization, you will be the sole owner and manager of your digital identity. Every sharing of your data will have to be previously approved by you.

XSL Labs’ Secure Digital Identity thus hopes to pave the way for Self-Sovereign Identity in the Internet of tomorrow.

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In order to fight against data theft, XSL Labs has developed a decentralized identifier (DID): the Secure Digital Identity (SDI). Whether it's corporate data, identity data or medical data being hacked, what they have in common is that they are all stored on centralized databases. The centralization of data storage is the first problem that XSL Labs' solution intends to address. This is a major problem as it allows hackers to steal a very large amount of data in a single operation.

This is the first problem that the SDI solves. The blockchain and distributed ledgers that constitute the basis of the DID technology allow for the decentralization of the storage of personal data of SDI users and therefore do not require a central authority to operate. With the SDI, no one will be able to link my personal data to me. I will be the only person able to use my own data.


Thanks to the decentralization, a hacker who wants to obtain the personal data of the SDI users has to hack each user’s device one by one, which is a time cost that cannot be made profitable by reselling the data.  It is as if instead of having to defeat the security system of a single centralized bank safe containing the deposits of all its customers, thieves would have to break into the homes of all savers, find their personal safes and open them one by one to get the same benefit.

The second problem that the SDI solves is the dispersion of personal data. Thanks to the SDI, I can sign in on a site or a service and have access to it without that service having access to my personal data.

Also, if at some point I need to share personal data with this service, I could to choose the specific data I want to share with it, and I would not have to reveal personal data that is unnecessary for a particular action. Because the service has only limited access to my personal data, it will not be able to reconstitute my identity and thus exploit my data for commercial or political purposes.

It will even be possible for me to access a service without disclosing any of my personal data, by simply issuing a document that certifies that my personal data meets the conditions for accessing a service, without this document containing any personal data itself. This process is called Zero-Knowledge Proof.

As the use of DIDs becomes more and more important in society, our identity on the Internet will become more and more secure. XSL Labs’ SDI will be able to be used in the same way as all other existing DIDs.

The SDI is fully manageable through the decentralized app: ONE.

It will be possible to use three types of SDI:

A temporary SDI

Allowing quick access to a service and to the advantages it offers. It will generally contain only one piece of identity data and its validation will have to be carried out quickly in order to make the most of the service’s potential.


An unverified SDI

Which will not require a validated KYC. It will provide a complete and encrypted decentralized digital identity. A multitude of services will then be offered to the user while keeping control over his personal data. Any use of his data will require the user’s consent, which will greatly reduce the propagation of his digital identity on the Internet. His digital identity will be decentralized but not yet verified. Identity verification allows us to be certain that a user is indeed who they claim to be. For this, it is necessary to take a last step in order to fully access the Internet of Trust.

A verified SDI

Which will require a validated KYC. It will provide a verifiable and decentralized digital identity. The user will then be able to prove his identity to his interlocutor and choose which data his interlocutors will be allowed to see. In addition to protecting his data, the user will be able to verify the authenticity of the identity of his contacts.

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