Terms of Service

Last updated: March 19, 2026

1. The Service

Sifero Cloud provides Zero-Knowledge encrypted cloud storage. We encrypt your data in your browser before it reaches our servers. We cannot access, read, or decrypt your stored content.

2. Your Account

• You create an account with a username and password. No email or personal information is required.
• You are solely responsible for your password. We cannot recover it.
• You are responsible for all activity under your account.
• One person may maintain multiple accounts.

3. Acceptable Use

You may use Sifero Cloud for any purpose. However, you agree NOT to:

• Store, distribute, or facilitate distribution of child sexual abuse material (CSAM)
• Use the service to plan or execute acts of terrorism or violence
• Attempt to break, circumvent, or interfere with the service's security
• Perform denial-of-service attacks against the service
• Use the service to send spam or phishing
• Resell access to the service without authorization

While we cannot inspect your encrypted files, we reserve the right to suspend accounts pending investigation if we have reason to believe these terms are violated based on metadata or external reports.

4. Our Position on Abuse

We built this service to protect privacy, not to enable harm. While our Zero-Knowledge architecture means we cannot inspect your encrypted files, we want to be clear:

• We will provide all available metadata (IP addresses, timestamps, file sizes) to authorities when presented with a valid legal request regarding these crimes
• We support and comply with laws combating the exploitation of children worldwide

Privacy is a human right. Using it to harm others is not what we stand for. If you encounter abuse on our platform, contact us immediately through the support chat.

5. Plans and Payment

• Free accounts (SHADOW plan) are limited to 100 MB of storage
• Paid plans (PHANTOM, SPECTER, WRAITH) offer additional storage and features as described on the pricing page
• Prices may change with 30 days notice
• Yearly plans receive a 25% discount
• Refunds are not available. The refund process requires linking payment data to an account, which would compromise the anonymity principle of the service

6. Data Ownership

Your data belongs to you. We claim no ownership or license over your content. We cannot access it anyway.

We store your encrypted data on servers in secure data centers. Since all data is encrypted client-side, server location does not affect your privacy or security.

7. Availability

We aim to provide 99.9% uptime but do not guarantee it. The service is provided "as is". We may perform maintenance with reasonable notice.

We are not liable for data loss, though we employ industry-standard redundancy and backups for encrypted blobs.

8. Account Termination

• You may delete your account at any time through the app
• We may suspend or terminate accounts that violate these terms
• Upon termination, all encrypted data is permanently deleted within 30 days
• Panic Wipe (WRAITH plan) provides immediate, irrecoverable deletion

9. Warrant Canary

We maintain a Warrant Canary for each account. This is an indicator that we have not received government requests for your data. If the canary status changes, it may indicate that such a request has been received. This is a transparency mechanism, not a legal guarantee.

10. Limitation of Liability

To the maximum extent permitted by law:

• We are not liable for any indirect, incidental, or consequential damages
• Our total liability is limited to the amount you paid for the service in the 12 months preceding the claim
• We are not liable for data loss due to forgotten passwords (Zero-Knowledge design)
• We are not responsible for data provided to authorities under valid court orders

11. Open Source

Our client-side encryption module is open-source under the MIT License (github.com/sifero-cloud/crypto). The server-side code is proprietary.

12. Governing Law

These terms are governed by the laws applicable to your jurisdiction. For EU/EEA users, GDPR applies. Disputes will be resolved in accordance with applicable law.

13. Changes

We may update these terms. Significant changes will be communicated through the service at least 14 days before taking effect. Continued use constitutes acceptance.

14. Contact

Questions about these terms: use the in-app Support chat.