Technical Overview
Timos uses an end-to-end encryption (E2EE) architecture to protect communication data through cryptographic algorithms, key management, transport security, and device-level security mechanisms.
The Timos security architecture consists primarily of:
Timos currently uses the following cryptographic algorithms and security protocols:
| Technology | Purpose |
|---|---|
| X25519 | Key agreement |
| AES-256-GCM | Data encryption and integrity protection |
| HKDF-SHA256 | Key derivation |
| BLAKE2b | Cryptographic hashing |
| SHA-256 | Hashing and integrity processing |
| TLS 1.3 | Network transport security |
These technologies form the core cryptographic foundation of the Timos security architecture.
Timos uses a layered key management architecture, with appropriate encryption keys used for different communication sessions and security contexts.
Key management includes:
Encryption keys are generated and managed through the communication endpoints. The server does not directly hold plaintext keys used to decrypt end-to-end encrypted communication content.
Timos uses end-to-end encryption to protect communication data.
Under the E2EE architecture:
Sender → Encryption → Server Transport → Recipient Decryption
Communication content is encrypted on the sending device and decrypted on the receiving device.
The server primarily provides communication transport, routing, and related service functions, and does not directly participate in decrypting end-to-end encrypted communication content.
Timos uses key update mechanisms to reduce the security risks associated with long-term use of a single encryption key.
Encryption keys can be updated and derived during communication sessions so that different stages of communication can use different keys, providing stronger isolation between encrypted data.
Timos uses TLS 1.3 to protect network communications between clients and servers.
TLS 1.3 provides transport-layer protection against risks such as interception, tampering, and certain types of man-in-the-middle attacks during network transmission.
E2EE and TLS 1.3 operate at different security layers:
Timos uses security mechanisms provided by the underlying mobile operating systems to protect sensitive data and cryptographic keys on user devices.
Where supported by the operating system, system-level secure storage and data protection mechanisms are used to reduce the risk of unauthorized access to locally stored cryptographic material.
Timos applies encryption mechanisms to protect real-time audio and video communication.
Real-time communication uses dedicated security mechanisms for protecting audio and video data during transmission, while maintaining the overall security architecture of Timos.
The Timos server functions as part of the communication infrastructure.
Server-side responsibilities primarily include:
For communication content protected by end-to-end encryption, the server does not directly participate in plaintext decryption.
The separation between endpoint encryption and server-side infrastructure forms an important boundary within the Timos security architecture.
The overall Timos security architecture can be summarized as:
Device Security → Key Management → End-to-End Encryption → TLS 1.3 → Server Transport
These security layers work together to provide protection across the device, cryptographic key, communication content, and network transport layers.
Timos continuously evaluates its security architecture in accordance with developments in cryptography, operating system security, and network security technologies.
Specific technical parameters, implementation details, and cryptographic components may be updated as the product and underlying security technologies evolve.