Worldcoin iris codes can be deleted upon request

Update (April 9, 10:30am ET): Corrected headline to "iris codes."

After Worldcoin WLD +6.51% 's quest to verify people's humanity by scanning eyeballs has continued to trigger government scrutiny, the project is rolling out another measure aimed at mitigating privacy concerns.

With its latest update, Worldcoin is giving users the option to request that the identification number created from their eyeball scans, or the "iris code," be permanently deleted. "Now, World ID holders have even more control with the option to unverify their World ID," the project said in a statement. "This includes the permanent deletion of their iris code, which is a numeric representation of their unique iris texture."

Worldcoin has assigned World IDs to nearly 5 million people who consented to have their irises scanned in order to prove their "personhood," or that they are human. The project also awards signups with cryptocurrency in the form of Worldcoin tokens.

Tools for Humanity, co-founded by OpenAI CEO Sam Altman, is the lead software contributor behind the Worldcoin project. Much of the Worldcoin project has been created around the idea that as the use of artificial intelligence becomes more prominent, having a reliable system in place capable of proving what online actors are human will become increasingly vital.

In recent weeks, Worldcoin's ambitious initiative aimed at digital IDs that prove they are human has been both scrutinized, and in some cases, completely disrupted. In March, South Korea launched a probe while both Spain and Portugal told the project to stop collecting people's biometric data.

Worldcoin has taken other measures recently

Worldcoin has maintained that it takes the protection of users' personal biometric data seriously. Roughly two weeks ago, in an effort to quell growing concern, Worldcoin rolled out a new initiative called "Personal Custody" which gives new users more control over their data. With "Personal Custody" new signups have their personal data stored on their own personal devices, in most cases a smartphone. Additionally, new signups are not able to request that Worldcoin encrypt and store their data.

Besides Worldcoin now giving World ID holders, who have already signed up, the ability to request that their iris code be deleted, the project also said it will institute "in-person age verification checks to help ensure Worldcoin is available only to humans 18 years and older."

The two latest measures announced on Tuesday "were developed in consultation with third-party privacy and security experts, and based on preliminary assessments and questions raised by data protection authorities in some places where Worldcoin is available," the project said in a statement.

When World ID holders ask to have their iris code deleted, the project said it will do so, but only after six months.

"The individual‘s World ID will become invalid and a six-month 'cool off' period will be initiated to help protect against fraud by ensuring individuals cannot immediately re-verify their humanness," said Worldcoin. "At the end of this cool off period, their iris code will be permanently deleted and unrecoverable."