Why Secure Cloud Storage Still Matters
Secure cloud storage protects sensitive data from theft, loss, and unauthorized access while offering the convenience of remote access. Even though the review focuses on services evaluated in 2017, the security fundamentals—encryption, compliance, and access controls—remain relevant for any modern storage decision.
- Why Secure Cloud Storage Still Matters
- Key Security Criteria Used in 2017 Reviews
- Top Secure Cloud Storage Providers in 2017
- Detailed Look at Each Provider
- Sync.com
- SpiderOak ONE
- pCloud Crypto
- Box (Business)
- Google Drive (Enterprise)
- How to Choose the Right Service for Your Needs
- Future‑Proofing Your Cloud Storage Choice
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Key Security Criteria Used in 2017 Reviews
To compare providers objectively, we measured each service against five core criteria:
- Data‑in‑transit encryption (TLS/SSL)
- Data‑at‑rest encryption (AES‑256 or stronger)
- Zero‑knowledge architecture (provider cannot read your files)
- Compliance certifications (ISO 27001, SOC 2, HIPAA, GDPR readiness)
- Two‑factor authentication (2FA) options
Top Secure Cloud Storage Providers in 2017
The following services consistently met or exceeded the criteria above while offering competitive pricing and usable interfaces.
| Provider | Encryption Model | Zero‑Knowledge | Compliance Highlights | Starting Price (USD/Month) |
|---|---|---|---|---|
| Sync.com | AES‑256 at rest, TLS 1.2 in transit | Yes (full zero‑knowledge) | ISO 27001, SOC 2, HIPAA‑Ready | 5.00 |
| SpiderOak ONE | AES‑256 at rest, TLS 1.2 in transit | Yes (Zero‑Knowledge) | ISO 27001, SOC 2 | 6.00 |
| pCloud (Crypto) | AES‑256 client‑side encryption | Yes (optional Crypto folder) | ISO 27001, GDPR‑Ready | 4.99 |
| Box (Business) | AES‑256 at rest, TLS 1.2 in transit | No (admin can access) | ISO 27001, SOC 2, HIPAA, FedRAMP | 5.00 |
| Google Drive (Enterprise) | AES‑256 at rest, TLS 1.2 in transit | No (Google can access metadata) | ISO 27001, SOC 2, GDPR, HIPAA (via G Suite) | 6.00 |
Detailed Look at Each Provider
Sync.com
Sync.com is a Canada‑based service built around a strict zero‑knowledge model. Files are encrypted on the client before leaving the device, and the company cannot decrypt them. It offers folder sharing with password protection and expiry dates, making it suitable for both personal and small‑business use.
SpiderOak ONE
SpiderOak emphasizes its "No Knowledge" policy, meaning even the company's staff cannot view user data. It provides versioning, secure file sharing, and a backup‑only mode that mirrors local files to the cloud without a sync‑folder UI.
pCloud Crypto
pCloud's standard offering stores data encrypted on the server, but the optional Crypto folder adds client‑side encryption, delivering zero‑knowledge for those files only. Its lifetime‑purchase option (one‑time fee) is unique among premium services.
Box (Business)
Box is an enterprise‑focused platform with robust admin controls, integration with Microsoft 365, and strong compliance certifications. While not zero‑knowledge, it offers granular permission settings and optional encryption keys for higher‑tier plans.
Google Drive (Enterprise)
Google Drive's strength lies in its seamless integration with Google Workspace. Security features include 2FA, advanced phishing protection, and extensive compliance coverage. However, data is not zero‑knowledge, and Google retains the ability to scan content for service improvements.
How to Choose the Right Service for Your Needs
Consider the following decision matrix:
- Zero‑knowledge required? Choose Sync.com, SpiderOak, or pCloud Crypto.
- Enterprise collaboration? Box or Google Drive provide deeper integration with office suites.
- Budget constraints? pCloud's lifetime plan may lower long‑term cost, while Sync.com's basic plan is the cheapest monthly option.
- Regulatory compliance? All listed services meet ISO 27001, but only Box and Google Drive have FedRAMP and extensive HIPAA coverage for large organizations.
Future‑Proofing Your Cloud Storage Choice
Even though the review reflects 2017 offerings, the security principles remain stable. When evaluating a provider today, verify that they still:
- Maintain AES‑256 encryption at rest and TLS 1.2+ in transit.
- Offer zero‑knowledge options or clear key‑management policies.
- Renew compliance certifications annually.
- Provide multi‑factor authentication and security‑key support.
By applying the same checklist, you can ensure that any newer plan you adopt inherits the same level of protection that earned these services top marks in 2017.