MegaFile exists in two completely different modes, designed for entirely different needs: the free service — convenient for occasional, non-sensitive transfers — and the End-to-End version, created for professional use, confidential transmissions and operational scenarios requiring high security. Both modes share the same philosophy: MegaFile is not a cloud, and does not intend to be. Its purpose is not storage, but providing a secure, fast and non-persistent transmission channel.

🏆 Advantages of the End-to-End version for professional use

The End-to-End mode is designed for contexts where security, privacy and operational control are not optional. Unlike the free version, it uses client-side encryption, a link-key and a configurable retention period. It is ideal for:

• Law firms: contracts, briefs, court documents, confidential client information.
• Financial and tax consultants: balance sheets, tax documentation, sensitive reports.
• HR teams and recruiters: CVs, personal data, identity documents.
• Healthcare and medical use: medical reports, clinical documentation, protected health information.
• Companies with sensitive technical documents: project files, operational documentation, internal schematics.
• Professionals under NDA: confidential materials, drafts, prototypes, unpublished concepts.
• Investigation teams, security analysts, forensics: classified documents, digital evidence.
• Creators and designers: previews, unreleased material, sensitive directories.

Here, security is not an “extra”—it is the foundation of the system.

🛡 Why MegaFile End-to-End is ideal for critical files

• Real end-to-end encryption with client-side encryption via WebCrypto
• Zero persistence: no storage, no history, no recovery possible
• No account required — and no storage even for registered users
• Automatic deletion after 3, 7 or 14 days
• On-the-fly decryption via a unique link-key that cannot be obtained in any other way
• Unlimited downloads during the selected operational window, with no hidden costs
• No vendor lock-in: no ecosystem to manage, no data stored without your knowledge
• No file analysis, processing, or profiling

MegaFile End-to-End is not a cloud storage service: it is a temporary single-key vault, designed to transfer critical information in a controlled, ephemeral and secure way. This complete absence of persistence — the opposite of traditional cloud — is what makes it unique in the European market.

The difference is not just marketing: MegaFile End-to-End uses a completely different architectural model compared to traditional cloud storage and file-sharing services. Most popular platforms rely on a centralized system where files are uploaded in plain text or encrypted server-side, and only then stored in data centers. This means the platform always holds the keys needed to decrypt your files, and can technically (or legally) access, analyze or provide them to third parties.

MegaFile works in a completely different way:
📄 encryption happens directly in the user’s browser before the file leaves the device;
🔐 the decryption key is never stored on the server: it only travels inside the final link-key;
🔥 all documents present on the server are encrypted blocks, unusable without the key contained in the link.

This completely changes the paradigm:

The server does not possess the keys and therefore cannot read, analyze or provide the contents.

There are no “backup copies” or intermediate versions that could be used to reconstruct the files.

Each upload is an isolated mission: no account, no history, no persistence.

Deletion after 3, 7 or 14 days is not a cosmetic feature: it is the core of the operational model, reducing attack surface, retention and breach risk.

This approach is appreciated in contexts where privacy is mandatory: lawyers, consultants, technical firms, private investigators, medical professionals, companies handling sensitive contracts and data. The goal is not to create a cloud, but to create a secure operational channel for transferring sensitive data.

The encryption used by MegaFile is based on AES-256-GCM, a mode approved by the National Institute of Standards and Technology (NIST) and used in government, military and critical infrastructure (energy, banking, healthcare). The system uses a key generated locally in the browser via WebCrypto, using native OS algorithms that are tamper-resistant.

The process has three main phases:

① Key generation on the device
The browser randomly generates a 256-bit key.
This key is never sent to the server.
The server cannot know or reconstruct it.

② Client-side encryption before upload
Each file is encrypted locally using AES-GCM, producing data unreadable even under brute-force attacks.
Only the encrypted file is uploaded.

③ Creation of the link-key
The key is embedded into the final link as a security parameter.
Only the person who has the link can decrypt the data.
The server only receives the key temporarily when the recipient opens the link, to decrypt the file on the fly.

This means that even if the server is breached, nothing is exposed — the files remain encrypted at all times.

The only vulnerable point is how the user manages and shares the link.

From a security perspective, it is superior to systems where “the server holds the key.” Here, the key technically does not exist on the server at all.

Permanent storage is convenient… until the day it isn’t. Any file that remains online too long becomes a potential vulnerability. All major data breaches of recent years share one common factor: data stored for far too long.

MegaFile applies a data-minimization and zero-retention model:

• no personal archive
• no history
• no dormant files
• automatic deletion without human intervention
• a controlled lifespan drastically reducing risks

Why is this so important?

1️⃣ Reduced attack surface
The shorter a file is online, the fewer opportunities attackers have.

2️⃣ Natural compliance with GDPR, NIS2 and DSA
European regulations promote data minimization.
MegaFile respects this principle by design.

3️⃣ Protection in critical transmission contexts

• sensitive contracts
• investigation reports
• medical documents
• financial information
• prototypes, intellectual property
• classified or confidential materials

In these contexts, permanent storage is a risk, not an advantage.

4️⃣ Complete deletion without residues
MegaFile stores no internal copies, no temporary versions, and no reconstructible metadata.
When a file expires, it is completely removed at filesystem level.

The limited duration is not a restriction: it is part of the security architecture.

Yes — and this is often underestimated. Having an account means:

• permanent metadata are generated
• upload history is created
• IP addresses, timestamps and activity logs are stored
• files can be linked to identities
• documents can be correlated to users

MegaFile avoids this entirely. Without accounts:

• no “file history” exists
• files cannot be linked to their uploader
• no database connects users and documents
• no internal backups or synchronizations
• each upload is an isolated event

This model is valued by professionals working with:

• investigation material
• confidential government documents
• corporate security reports
• highly sensitive personal data (healthcare, HR, legal)
• confidential internal or client communication

And without accounts, there are no passwords to steal, breach or leak. Security becomes inherently higher and the attack surface smaller.

The link-key is everything: whoever has it can access the files; without it, nothing is possible. Here’s how it works:

🔐 1. The link contains the decryption key
Without that parameter, the server only sees encrypted data.

🛡 2. Interception of network traffic?
The communication uses HTTPS, so an attacker cannot read or manipulate it without breaking TLS — highly unlikely.

🔍 3. Interception of the link in a chat?
It depends on the platform:

• WhatsApp → encrypted
• Signal → encrypted
• Email → potentially less secure
• Messenger / Instagram → varies by context

If someone captures the full link, they can access the files — just like any private link system.

💥 4. Why files remain much more secure than with other services
Because:

• there are no accounts to compromise
• no permanent storage
• no server-side copies
• the key is generated locally
• the duration is limited
• the server retains nothing after deletion

If a link is compromised, simply let the files expire — access disappears automatically.

🧩 5. Recommended best practices

• send the ZIP password via a different channel
• avoid sharing links in large groups
• use secure messaging apps
• never reuse the same link for multiple recipients

In short: user behaviour matters, but the system eliminates the structural risks.