Cloud Storage Syncing Solutions

Hey everyone,

I'm looking to move some sensitive data to a cloud storage service, and E2EE is a non-negotiable requirement for me. I've been researching different solutions, but it's hard to get a clear picture of how they compare in terms of security, privacy, and usability.

Specifically, I'm interested in understanding:

• Which popular cloud storage providers offer true E2EE for all files by default or as an easy option?
• How do their encryption algorithms and key management practices differ?
• Are there any significant performance impacts or usability trade-offs to be aware of?
• What are the implications for data recovery if keys are lost?

I've looked at options like Sync.com, pCloud (with its Crypto add-on), Tresorit, and Proton Drive. Any insights or personal experiences comparing these, or other E2EE services, would be greatly appreciated. I want to make an informed decision to ensure my data is truly private and secure.

Thanks in advance!

Great topic, TechSavvyUser! This is a crucial aspect for many of us.

From my experience:

• Sync.com is often praised for its simplicity and strong E2EE implementation. It encrypts everything on your device before uploading, and they have a zero-knowledge policy. Key management is handled by the service but secured with your password. Recovery can be tricky if you lose your password, as they can't access your data.
• pCloud Crypto is an add-on. While pCloud itself is great, the Crypto feature needs to be purchased separately. It offers E2EE, but it's not the default for all files. The performance impact is minimal for daily use.
• Tresorit is more enterprise-focused and generally considered very secure, with robust E2EE and compliance features. It can be a bit pricier.
• Proton Drive, from the makers of ProtonMail, also offers E2EE and a strong focus on privacy. It integrates well with their other services.

One common trade-off with E2EE is that features like server-side search or quick previews of encrypted files can be limited or unavailable, as the server cannot "read" your data. Also, if you lose your password/key, data recovery is often impossible unless the service offers a specific recovery mechanism (which defeats some E2EE principles).

For ease of use and strong E2EE by default, Sync.com and Proton Drive are often top contenders.

Adding to what AnonymousUser said, it's also worth considering the client software itself. How well is it maintained? Are there any known vulnerabilities? For true E2EE, the encryption and decryption happen client-side, so the integrity and security of the app are paramount.

I've personally used Sync.com and haven't had any major issues. The interface is clean, and the sync is reliable. The only real downside is the lack of third-party app integrations that rely on direct file access (like some photo editors or document scanners) without going through their app.

Also, if you're comparing, look at how they handle selective sync or folder sharing. E2EE can sometimes complicate these features, making them less intuitive than non-E2EE services.