ca4b specializes in secure software development, offering the 4b platform for reliable, end-to-end encrypted data exchange. Their solutions ensure data protection during transmission, as encryption and decryption occur in the browser, keeping server access to data keys impossible. Beyond the platform, the company provides custom application development services tailored to specific business security and efficiency requirements.
Funding
Funding not disclosed
Founders
Product
Problem
Organizations that exchange sensitive files via email or standard cloud services expose data to interception, compromised mailboxes, lost devices, and insider threats, because those platforms lack true end‑to‑end encryption and often store plaintext on servers.
Solution
ca4b’s 4b‑platform delivers browser‑based end‑to‑end encryption for file transfer, ensuring that data are encrypted on the sender’s device and only decrypted on the recipient’s device. The platform’s two core services—share‑4b for sending and receive‑4b for receiving—use a hybrid RSA‑4096/AES‑256 scheme, so encryption keys never touch the server. All traffic is routed through ISO 27001‑certified German data centers, and each transfer is logged for auditability. Users generate secure, password‑protected URLs that grant single‑use access, with optional automatic deletion after download. The platform also offers an Outlook add‑in for seamless link creation and a custom software development service for organizations with unique security or workflow requirements.
Target Audience
The primary customers are enterprises, SMEs, and regulated industries (e.g., finance, healthcare, legal) that require confidential file exchange, as well as developers seeking a secure data‑transfer component for their applications.
Features
- Browser‑side encryption/decryption using RSA‑4096 for key exchange and AES‑256 for payload protection
- Zero‑knowledge architecture: encryption keys are never stored or transmitted to the server
- Secure, single‑use download links with optional password protection and automatic post‑download deletion
- Comprehensive audit log tracking all access events and file transfers
- Deployment in ISO 27001‑certified German data centers with full TLS‑encrypted transport
- Outlook add‑in enabling one‑click generation of encrypted share links from email clients
- Custom application development leveraging full‑stack, containerized, or serverless architectures to meet specific security and integration needs