Zero-Knowledge Backup in Practice: How True Client-Side Cryptography Works
A technical deep dive into zero-knowledge backup architectures, covering Argon2id key derivation, AES-256-GCM AEAD encryption, and threat models.
Zero-Knowledge Backup in Practice: How True Client-Side Cryptography Works
In modern cybersecurity, Zero-Knowledge Architecture means that the software developer, cloud storage providers, and network intermediaries possess zero mathematical capability to inspect, decrypt, or tamper with user data.
This technical guide breaks down the exact cryptographic implementation that makes YourKeep a true zero-knowledge backup system.
The Zero-Knowledge Cryptographic Pipeline
[ User Master Passphrase ]
│
▼ (1. Argon2id Memory-Hard KDF with 64 MB RAM Cost)
[ 256-bit Symmetrical Root Encryption Key ]
│
▼ (2. AES-256-GCM Authenticated Encryption with 96-bit Unique Nonce)
[ Authenticated Ciphertext Blob + 128-bit GHASH Tag ]
│
▼ (3. Reed-Solomon 6-of-10 Threshold Matrix Sharding)
[ 10 Self-Contained Cryptographic Fragment Files (.keep) ]Core Security Guarantees
- Passphrase Never Transmitted: Your master passphrase is processed solely in local memory and is never sent over any network.
- Tamper-Evident Authentication: The 128-bit GHASH tag detects any bit flipping or malicious modification on disk before decryption is attempted.
- Brute-Force Resistance: Argon2id memory costs make large-scale GPU/ASIC dictionary attacks economically impossible.
Conclusion
Zero-knowledge is not a marketing catchphrase—it is an uncompromising mathematical guarantee. Build your personal vault with YourKeep today.