Under the Hood
Cloud4Send is built on a modular OOP architecture, leveraging edge computing and Large Language Models (LLMs) to redefine secure file transfer.
Core Engine
PHP 8.2+ Backend with strict typing and modular architecture. Custom router handles API requests with sub-millisecond overhead.
Edge Storage
Bunny.net integration ensures files are stored on the nearest edge node to the user, reducing latency by up to 70%.
AI Analysis
Llama 3 70B model via Groq API analyzes file metadata and behavioral reports to generate real-time risk scores.
Zero-Trust
Signed URLs, forced download headers, and auto-destruction policies ensure data never persists longer than needed.
The Security Pipeline
1. Hash-Based Pre-Scan
Upon upload initiation, the SHA-256 signature of the file is extracted client-side. This hash is immediately queried against the VirusTotal API database. This allows us to identify known threats in milliseconds without uploading the full 10GB file to a scanning server.
2. Magic Bytes Verification
To prevent "Extension Spoofing" (e.g., an .exe file renamed as .pdf), the system reads the file's binary header (Magic Bytes). If the MIME-type declared by the browser does not match the binary signature, the upload is rejected immediately.
3. AI Risk Scoring (Groq Integration)
Technical analysis data is fed into the Llama 3 70B model via Groq. The AI evaluates behavioral indicators and generates a 0-10 Risk Score. Files scoring >9 are flagged as "Critical Threat" and destroyed.
4. Isolation & Storage
Clean files are encrypted (AES-256) and moved to a unique storage bucket. Direct access is blocked via Edge Rules; access is only possible through temporary, cryptographically signed URLs.
User Tokenization Logic
We do not use sequential IDs. User identity is protected through a salted hash mechanism, ensuring that storage directories cannot be enumerated.
$salt = getenv('SYSTEM_SALT');
$hash = hash('sha256', $email . $salt);
// Result: 8f9a...3b21
return substr($hash, 0, 32);
}
// Storage Path:
/storage/8f9a3b21/Q3_Report.pdf
Encryption Standards
Ready to Integrate?
Our Elite plan offers full API access, allowing you to integrate Cloud4Send's security stack directly into your internal tools or customer-facing products.