Every attachment receives a fresh random 32-byte content key, encrypted client-side and safely transported inside hybrid post-quantum protocol envelopes.
Protecting media and attachments in secure messaging requires more than just encrypting text messages. When sending high-resolution photos, long videos, or large documents, Livara ensures uncompromising security by generating a fresh random 32-byte content key for every single attachment and sealing it securely within hybrid post-quantum transport envelopes.
Key takeaways
- Livara assigns a fresh, random 32-byte content key to every uploaded image, video, document, and voice note before it leaves your device.
- Attachments are encrypted client-side using AES-256-GCM, ensuring that raw media never travels across the wire in plaintext.
- The unique 32-byte content key travels safely inside the hybrid post-quantum protocol envelopes of LVR1 for direct chats and LGS1 for private groups.
- Public broadcast channels are explicitly unencrypted by design, allowing moderation of abusive material, while direct and group messages remain fully sealed.
- Users can verify protocol specifications directly through engineering evidence and cryptographic test vectors available via Livara's documentation.
چگونه محتوای رمزنگاری شده لیوارا از عکسها و فایلهای شما حفاظت میکند؟
Livara secures attachments by combining client-side symmetric encryption with hybrid post-quantum key exchange mechanisms. When you share media, the application generates a unique 32-byte random key for that specific file, encrypts the payload using AES-256-GCM as detailed in NIST's cryptographic standards, and embeds the decryption key within the secure message envelope.
Direct messages rely on the LVR1 protocol, which combines a classical ECDH P-256 ratchet with an ML-KEM-768 epoch ratchet defined in NIST's FIPS 203 specification. For a deeper understanding of how these mechanisms operate across different layers, you can review the technical breakdown on MLS RFC 9420 vs LGS1: Group Encryption Comparison. Furthermore, the core mechanics of hybrid ratchets are outlined in the official Hybrid Post Quantum Ratchet: ML-KEM-768 in Livara Chat documentation.
امنیت عکس و ویدیو در پیام رسان چگونه پیادهسازی شده است؟
Image, video, and file protection is achieved by decoupling heavy payload encryption from the primary messaging ratchet. Instead of passing massive files directly through the double ratchet, Livara encrypts the attachment locally with AES-256-GCM, sending only the encrypted blob alongside the safely wrapped content key.
This architecture guarantees that even if transport metadata or intermediary storage encounters scrutiny, the underlying media remains completely indecipherable without the paired cryptographic key. To verify your application binaries and ensure complete client integrity before handling sensitive files, you can inspect release hashes directly through the Proof Lab.
رمزنگاری فایل های حجیم در بستر پسا-کوانتومی چگونه انجام میشود؟
Large files and rich media payloads are handled efficiently without sacrificing quantum resistance. Because the heavy data is locked under a symmetric AES-256-GCM cipher with a 12-byte nonce and 16-byte tag, the performance overhead on mobile and web clients remains minimal while maintaining robust confidentiality.
For a complete overview of how client sessions, key recovery phrases, and durable synchronization interact across web and Android clients, consult the architecture guide at How Livara Chat Encryption, Recovery and Sync Work. You can also explore the broader product ecosystem and features by visiting the main Livara Platform website.
Frequently asked questions
Are public channels protected by the same attachment encryption?
No, public broadcast channels are intentionally unencrypted by design to allow platform moderation, content removal, and abuse prevention. Only direct messages and private groups benefit from end-to-end encryption and secure attachment handling.
What happens to the content key after an attachment is sent?
Each attachment receives a completely fresh, random 32-byte content key that travels exclusively inside the encrypted LVR1 or LGS1 protocol envelope, ensuring that no two files ever share the same cryptographic key material.
Can call media use the same post-quantum ratchet as text messages?
No, voice and video calls utilize WebRTC DTLS-SRTP for media transport, while call signaling is handled via LCS1 messages. Call media is secured by WebRTC protocols rather than the messaging ratchet and is not classified as post-quantum.
How can I verify that my application installation is authentic?
Livara publishes explicit SHA-256 release checksums that allow users to verify their Android APK installations locally and offline, ensuring complete software integrity without relying on centralized app stores.
