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Chainsaw Blockchain

Chainsaw is a so-called layer-2 blockchain. In concrete terms, this means that we operate one of the fastest blockchains on the market, using the public blockchain (Bitcoin) as an anchor. But why use a blockchain?

Vector representation of the blockchain

Why use blockchain technology in a consent solution?

Blockchains are specialized databases whose main characteristic is immutability. By design, the modification or deletion of a data is impossible.

They are therefore drivers of trust.

As a reminder, each block is cryptographically attached to the previous one, so the modification of a transaction present in a block would require the recalculation of all the child blocks. The more transactions there are, the more robustness increases.

The notion of proof in context GDPR

GDPR creates a new constraint on the notion of proof, as the CNIL recently reminded us with the publication of its new guidelines. 

Indeed, if the legal basis sought is consent, then the controller must prove that consent has been obtained, prior to the processing of the personal data.

The use of a blockchain makes it possible to meet this legal constraint, on a large scale and in a way that is infinitely more secure than the mechanisms of code sequestration or screenshots. 

Our technical answer to these issues of scale and proof is Chainsaw, our private layer-2 blockchain.
We benefit from the speed of execution of our proprietary technology and a time-stamped anchor in public blockchains.

Consents are stored in this system, but the user ID is inferred upstream in order to comply with requests for the right to be forgotten (if it was agreed that the consent data was personal data not exempt from the right to be forgotten).

Strength of evidence

Thus, to change a single transaction and thus a fingerprint of a consent, one would have to :

  • Hack our user/transaction blockchain matching database
  • Recalculate the set of child blocks of the transaction in Chainsaw
  • Emerge a Bitcoin majority fork with enough transactions to rewrite the Chainsaw prints.
Not only do we keep a record of the consent or refusal of consent, but also the context in which it was obtained, i.e. the granularity of their choices, the version of the notice from which the consent was obtained and the source.
We also keep a history of changes to the user's consent. 

Some figures on Chainsaw

0 To
Size of our ledger
0 Billions
Cumulative transactions
0 Ms
End-to-end processing time

Our partners

What is Ad4good?

Ad4good is the first solidarity advertising network. If you accept personalised advertising on our site, you will be helping to finance some forty associations in need.

See the full list of associations on the Ad4good website

The Ad4good network is implementing 3 actions to ensure its mission:

  • Partnership between publishers and Ad4Good: part of the publisher's inventory is reserved for the distribution of solidarity ads. These ads are monetised by Ad4good, which then donates 50% of its margin to associations.
  • Partnership between advertisers and associations: each advertisement broadcast by the advertiser during an " Ad4Good" labelled campaign campaign generates a donation for the partner association of the campaign.
  • Partnership between publishers and associations: Ad4good offers publishers the opportunity to provide visibility to partner associations by reserving unused advertising space.

To allow the associations to continue their actions, you can accept in general or set the detail by allowing Store and/or access information on a terminal and Personalised advertising.

I understand

Ad4good, partner of the CMP AppConsent® for responsible and ethical advertising

We are partners with the Ad4good network, the first solidarity-based advertising network that brings together some forty associations.

See the full list of associations on the Ad4good website

The Ad4good network is implementing 3 actions to ensure its mission:

  • Partnership between publishers and Ad4Good: part of the publisher's inventory is reserved for the distribution of solidarity ads. These ads are monetised by Ad4good, which then donates 50% of its margin to associations.
  • Partnership between advertisers and associations: each advertisement broadcast by the advertiser during a campaign labelled "Ad4Good generates a donation for the partner association of the campaign.
  • Partnership between publishers and associations: Ad4good offers publishers the opportunity to provide visibility to partner associations by reserving unused advertising space.

What does this mean for your audience?

By opting in to the AppConsent® Xchange Solidaire offer, your participation will be mentioned on the first screen of your consent form.
If a user refuses collection for advertising purposes, a reminder screen will be displayed so that they can change their choices if they wish to be an actor of change towards more ethical advertising.

What are the eligibility criteria?

As a pre-requisite, your website must carry advertising. Once you have registered with AppConsent® Xchange Solidaire, you must have a significant amount of responsible advertising on your website (at least 20%).

The AppConsent® Xchange Solidaire offer allows you to take part in a more responsible advertising ecosystem focused on solidarity and environmental preservation.

I understand