Ever wondered if your children will inherit your digital data?

Longaccess promises to be a cold storage of sorts for your digital life. It's a cloud-based service that operates off Amazon's S3 data centers, but unlike other file lockers, such as Dropbox or Google Drive, Longaccess aims to be less accessible, but more dependable.

Once you sign up, it is simply a matter of choosing what files you want to keep and hitting upload. Once the process is complete, instead of storing the files in an account on a website or emailing you a link, Longaccess then provides you a code string that can be printed out as a certificate—or tattooed onto your arm.

However, the service is not a good fit for continuous backups—once an archive is uploaded, it can't be altered or deleted or updated. As far as founder and CEO Panayotis Vryonis is concerned, once it's up, it's there forever.

"Our service will not end the search for better ways to preserve data for centuries—at least, not in this version," Vryonis tells Wired.co.uk. "But it is way better than anything else the average consumer could use today to preserve their data for decades."

Vryonis founded the Greek company after wondering whether his two-year-old daughter would ever find her first photos when she was old enough to appreciate them. "Parents do like to think what will happen in 10 or 20 years, and the future of their digital archive is starting to be an issue," he says.

The way that Longaccess stores data is similar to a safety deposit box in a bank—a cinema favorite for long lost secrets or clandestine documents—and it seems Vryonis' service could offer a similar "Swiss haven" for those worried about the privacy of their documents in online storage. When asked how Longaccess would respond to requests from certain government agencies or entertainment industry trade groups, he explained: "We will obviously comply to any legitimate request. However, our user data are encrypted using AES-256 and a key that is randomly generated on their computer, and never sent to us. So, all we could provide in this case are encrypted binary objects.

"We did not take this approach to hide data from the law. We did it because 30 years is a very long time and anything that could happen, probably will: bad governments, hackers, human errors, etc. This was the only way we could assure our users that their data will not be accessed by anyone else but them."

The encryption is not the only technological guarantee Vryonis places on clients' data; the Amazon S3 service is also protected against multiple server power failures across several continents. According to the site, it has a durability of 99.999999999 percent, which means "if you store 10,000 objects with Amazon S3, you can on average expect to incur a loss of a single object once every 10,000,000 years." So your data is safe for as long as it's kept on the server. But for it to stay on the server, Longaccess must keep up rent payments for the space. So how can Vryonis guarantee the success of his tech startup, a notoriously short-lived business type, long enough to deliver on his promises?

"First of all, we are the only one trying to live up to such a promise, as far as I know," Vryonis says. "Building a company on the basis of a long-term promise, and liability, is not as attractive as it looks at first glance. And it's not very attractive for investors either. That said, we don't want to build a business based on a promise. We are working to set up a financial structure that will give a good guarantee that someone will be providing the minimum service, to make user data accessible, even if things go south. But I can't disclose any more details on this yet."

So far investors don't seem too perturbed by his chosen model; Longaccess secured €110,000 (£151,960) in its last round of seed funding in July 2013 from the JEREMIE OpenFund venture capital group. The idea seems appealing to a wide range of clients as well—after envisioning mostly businesses wanting to use the service to upload confidential files, invoices, and legal documents and then share them with colleagues with the generated key, Vryonis has found a much wider range of people wanting to use the service.

"We even had a small rock band interested in using Longaccess as a way to store their studio recordings. We think we've created a general purpose product that will probably have applications to areas we haven't thought of."

This story originally appeared on Wired UK.