Why privacy matters
Private delivery should be a property, not a promise.
Policies, ownership, employees, products, and commercial incentives can change. Cryptography cannot eliminate every risk, but it can reduce how much trust users must place in the company operating the transfer service.
Files reveal more than content
A transfer may contain contracts, financial records, medical information, unpublished creative work, source code, identity documents, or private family media. Exposure can harm people long after the transfer expires.
Capability matters more than intent
A provider may have a strong policy and sincere intentions. If it can technically recover plaintext, users still depend on its future decisions, access controls, personnel, vendors, and legal environment.
Data minimization limits damage
A breach of ciphertext-only storage is materially different from a breach containing readable files and usable keys. E2EE narrows what infrastructure compromise alone can reveal.
Privacy enables trust
People should be able to move legitimate private work without turning the transfer provider into an invisible participant. Sharebox is built to transport content without joining the conversation.
If storage, ownership, or policy changes tomorrow, the ciphertext should remain ciphertext.