Why Tresorit Stands Out in a Crowded Cloud Storage Market

End-to-End Encrypted Cloud Storage in the Wild A Broken Ecosystem Case Study by Jonas Hofmann, Kien Tuong Truong

Discover the key findings from an independent study by ETH Zürich on end-to-end encrypted cloud storage providers. Learn why Tresorit is a top choice for securing your business and personal data. Read the Full study here https://brokencloudstorage.info/

According to the study from ETH Zürich by Jonas Hofmann and Kien Tuong Truong, which scrutinized popular services like Sync, pCloud, Icedrive, Seafile, and Tresorit, most cloud providers face severe vulnerabilities. These vulnerabilities allow potential attackers to inject malicious files, tamper with metadata, and even gain access to confidential data. While competitors failed in various security tests, Tresorit’s encryption model held strong, earning its place as a leader in the space. Here’s why Tresorit is truly in a league of its own:

1. True End-to-End Encryption (E2EE) That Protects You, Even From Tresorit

Unlike many competitors who offer only encryption “at rest,” meaning the data is encrypted while stored but vulnerable in transit or on the server, Tresorit offers genuine end-to-end encryption. This means your files are encrypted on your device before they even reach the cloud, and only you hold the keys to decrypt them. Not even Tresorit can access your data—ensuring that even if their servers were compromised, your files remain completely secure. Many other providers analyzed in the study fall victim to server-side weaknesses, making their claims of “zero-knowledge” encryption meaningless.

2. Bulletproof Public Key Infrastructure (PKI)

One of the study’s most startling findings was how easily a compromised server could tamper with public keys in many cloud providers, like Sync and Seafile, allowing attackers to impersonate users or decrypt files. Tresorit, however, excels in this area by using a robust Public Key Infrastructure (PKI). Tresorit’s public keys are authenticated by certificates signed by their own trusted certification authority (CA), ensuring that even if the server were compromised, attackers would be unable to replace or manipulate the keys used for encryption.

3. World-Class Encryption Protocols

When it comes to encryption, Tresorit is in a class of its own. While competitors rely on outdated or vulnerable cryptographic methods, Tresorit utilizes AES-GCM for symmetric encryption and RSA-OAEP with 4096-bit keys for asymmetric encryption. These top-tier encryption standards ensure that both the confidentiality and integrity of your data are protected, making it far more secure than services using weaker or unauthenticated methods. Tresorit also uses scrypt and PBKDF2 key derivation functions, which greatly reduce the risk of brute-force attacks that plague many other providers.

4. Unmatched Metadata Integrity

Most cloud providers overlook the security of file names and metadata, which can leak vital information about the files themselves. The study reveals that providers like Sync, pCloud, and Icedrive allow for tampering with file names, paths, and other metadata. This could lead to significant confusion or worse—malicious actors could swap out critical files. Tresorit stands alone in cryptographically binding file names and paths to their encrypted content, ensuring that neither the server nor attackers can modify this metadata without detection. This is a critical layer of security that most other providers simply don’t offer.

5. Built for Business with Enterprise-Grade Features

Tresorit isn’t just secure—it’s designed for the needs of modern businesses. Administrative controls, encrypted user profiles, and company-wide encryption management make Tresorit the ideal solution for enterprises looking to safeguard sensitive data. Whether managing client data or protecting intellectual property, Tresorit offers tools that balance usability with security, a combination that few competitors can match.

6. Secure, Truly Private File Sharing

One of the most common pitfalls identified in the study is that many providers, like Sync, leak critical encryption keys when sharing files via links, putting user privacy at risk. Tresorit’s approach to file sharing is different. Files shared through Tresorit remain fully encrypted with client-side encryption keys, ensuring that even Tresorit’s servers never have access to the shared content. Whether you’re sharing sensitive legal documents or confidential business strategies, you can be sure that only the intended recipient has access.

7. Superior Defense Against File Injection and Manipulation

Unlike competitors like pCloud and Seafile, which are vulnerable to attacks where malicious files or folders can be injected into a user’s cloud storage, Tresorit’s advanced authentication and encryption mechanisms prevent such exploits. Tresorit’s system ensures that injected files would be immediately detected and flagged, protecting users from potential blackmail, fraud, or other malicious activity.

Conclusion: Security Without Compromise

As the study makes clear, the cloud storage ecosystem is fraught with providers that cut corners when it comes to security. Whether it’s unauthorized key replacement, metadata manipulation, or weak encryption practices, most solutions simply don’t live up to their promises. Tresorit, on the other hand, stands as a beacon of what truly secure cloud storage can and should be. For enterprises, privacy-conscious individuals, and anyone who values the confidentiality and integrity of their data, Tresorit offers a solution that not only meets but exceeds the highest standards of security find our products here = https://tresorit.com/