End-to-End Encryption for All Communications

Privacy isn't a premium feature—it's a fundamental human right. In an era of increasing surveillance, data breaches, and privacy concerns, users deserve to know that their communications, files, and personal information are truly private. Not just "private until we need to access it" or "private except from our company," but genuinely, cryptographically private in ways that even Tanqory cannot compromise.

Today, we're announcing that all Tanqory communications are now end-to-end encrypted by default. Not as an opt-in feature. Not just for premium users. For everyone, on every message, file, and collaboration, automatically. We've implemented zero-knowledge architecture where we literally cannot access your data, perfect forward secrecy ensuring past communications remain secure even if future keys are compromised, and verifiable encryption providing cryptographic proof that your data is protected.

This represents the most comprehensive deployment of end-to-end encryption for a productivity and collaboration platform. Your data, your eyes only—and we can prove it.

The Privacy Imperative in 2025

Privacy expectations and threats have evolved dramatically:

Ubiquitous Surveillance: Government surveillance programs, corporate data collection, and malicious actors create an environment where unencrypted communications are effectively public.

Data Breach Epidemic: Massive data breaches exposing millions of users' information have become routine. Even security-conscious companies get breached. End-to-end encryption ensures that even breached data remains unreadable.

Regulatory Requirements: Regulations like GDPR, HIPAA, CCPA, and emerging AI regulations increasingly require strong data protection. End-to-end encryption provides technical guarantees that complement legal protections.

User Expectations: Users increasingly understand privacy technology and demand it. As of 2025, zero-knowledge encryption is becoming the expected standard for privacy-conscious services.

Trust Deficit: Users are right to be skeptical of companies claiming to protect their data. End-to-end encryption backed by transparent cryptography provides verification, not just promises.

The message is clear: in 2025, any platform handling sensitive personal or business communications that doesn't offer end-to-end encryption is failing its users.

Our End-to-End Encryption Architecture

E2EE by Default for All Communications

Unlike services where encryption is optional or limited to certain message types, Tanqory implements end-to-end encryption universally:

Messages: Every direct message, group chat, and threaded conversation is end-to-end encrypted. Messages are encrypted on your device before transmission and can only be decrypted by intended recipients.

Files: Documents, images, videos, and all other files are encrypted before upload. Tanqory servers store only encrypted data—we can't view your files even if we wanted to.

Voice and Video: Real-time voice and video communications use end-to-end encryption with secure key exchange, ensuring calls remain private even as they traverse our infrastructure.

Collaboration: Shared workspaces, documents, and projects are encrypted with keys shared only among authorized collaborators. Adding someone to a project grants them encryption keys; removing them revokes access.

Metadata Protection: We minimize metadata collection (who communicates with whom, when, how often). While some metadata is necessary for service operation, we collect only what's essential and don't use it for purposes beyond technical necessity.

Search and Features: End-to-end encryption makes some features (like server-side search) impossible. We've developed client-side approaches enabling full-text search, smart features, and AI assistance without compromising encryption.

Zero-Knowledge Architecture

Zero-knowledge encryption takes security further than standard end-to-end encryption:

No Master Keys: Unlike some E2EE systems where service providers hold encryption keys or can compel key access, Tanqory's zero-knowledge design means we don't have and cannot obtain your encryption keys.

Client-Side Key Derivation: Encryption keys are derived from your password on your device, never transmitted to our servers. We receive only encrypted data and public keys.

No Password Recovery Backdoors: Because we don't have your encryption keys, we cannot reset your password without data loss. This trade-off—security vs. convenience—favors security. If you forget your master password, you lose access to encrypted data. This is intentional.

Cryptographic Verification: Users can verify that zero-knowledge architecture is genuinely implemented through open-source clients, published protocols, and independent audits.

Government Request Resistance: Because we don't have keys, we cannot decrypt user data even if compelled by legal requests. The most we can provide is encrypted data, which is worthless without keys we don't possess.

Feature Implications: Zero-knowledge means some convenience features common in unencrypted services (administrative password resets, automated account recovery, server-side data processing) are impossible. We believe this trade-off is correct—genuine security sometimes requires sacrificing convenience.

Perfect Forward Secrecy

Perfect Forward Secrecy (PFS) ensures that compromise of long-term keys doesn't compromise past communications:

Session-Specific Keys: Each communication session uses unique encryption keys generated for that session and then discarded. Compromising one session's keys doesn't help decrypt other sessions.

Key Rotation: Long-term identity keys are rotated regularly. Even if an identity key is compromised, it provides access only to future communications, not past ones encrypted under previous keys.

Post-Quantum Considerations: We're preparing for post-quantum cryptography by implementing hybrid key exchange combining classical and post-quantum algorithms, ensuring security even as quantum computing advances.

Ratcheting: For ongoing conversations, we implement the Signal Protocol's double ratchet algorithm, continuously deriving new encryption keys from previous ones and discarding old keys. This provides PFS for every message in a conversation.

Compromise Recovery: If a device is compromised, PFS limits damage to messages exchanged during the compromise period. Past messages encrypted under deleted keys remain secure.

Verified Encryption with Cryptographic Proof

Claims about encryption mean little without verification. We provide cryptographic proof:

Open Source Clients: Our client applications are open source, allowing security researchers to verify encryption implementation matches our claims.

Public Protocol Specifications: We publish complete specifications of our encryption protocols, enabling independent implementation and verification.

Reproducible Builds: Our applications use reproducible builds, allowing anyone to verify that published app binaries match published source code without hidden modifications.

Third-Party Audits: We commission regular independent security audits from respected cryptography firms, publishing results publicly (except vulnerabilities under responsible disclosure).

Key Verification: Users can verify encryption keys with contacts through out-of-band verification (QR codes, key fingerprints), ensuring they're communicating with intended parties rather than imposters.

Transparency Reports: We publish regular transparency reports detailing what data we have, government requests received, and what we can and cannot provide.

Technical Implementation Details

Cryptographic Primitives

Our encryption implementation uses well-tested, widely-reviewed cryptographic algorithms:

Symmetric Encryption: AES-256-GCM for encrypting data, providing both confidentiality and authentication Asymmetric Encryption: Curve25519 for key exchange (ECDH), Ed25519 for signatures Key Derivation: Argon2id for deriving encryption keys from passwords, resistant to brute force attacks Random Number Generation: Cryptographically secure random number generation from OS-provided sources Post-Quantum Preparation: Hybrid schemes combining classical and Kyber/CRYSTALS for quantum resistance

Key Management

Secure key management is as critical as encryption algorithms:

Device-Based Keys: Each device has unique encryption key pairs. Adding a new device requires authorization from an existing device, preventing unauthorized device addition.

Key Escrow (Optional): Users can optionally create encrypted key backups protected by separate strong passwords, enabling account recovery while maintaining security.

Multi-Device Synchronization: Encryption keys synchronize securely across user devices using encrypted synchronization protocols, enabling seamless multi-device usage.

Group Key Management: Group conversations use group encryption keys distributed securely to members. Adding/removing members updates keys, ensuring former members cannot decrypt new messages.

Enterprise Key Management: Enterprise deployments can implement additional key management policies, including optional key escrow for business-critical data, while maintaining end-to-end encryption for personal communications.

Performance Optimization

Encryption shouldn't compromise performance:

Hardware Acceleration: We leverage hardware cryptographic accelerators (AES-NI, ARM Crypto Extensions) for fast encryption/decryption without battery drain.

Efficient Protocols: Protocol design minimizes cryptographic operations through techniques like key caching, batched operations, and optimized handshakes.

Incremental Encryption: Large files are encrypted incrementally, allowing encryption to begin before entire file is available and enabling streaming encryption/decryption.

Client-Side Indexing: To enable encrypted search, we build search indexes locally on user devices, allowing full-text search without server-side access to content.

##Real-World Impact and User Experience

End-to-end encryption shouldn't feel like security theater—it should provide seamless security:

Transparent to Users: For most users, encryption is invisible. Messages send, files upload, everything works as before—just fundamentally more secure.

Verified Contacts: Users can verify they're communicating with intended parties through safety numbers and verification badges, providing assurance without complexity.

Multi-Device Seamless: Despite complexity of secure multi-device synchronization, users simply sign in on new devices and access their securely encrypted data.

Performance: Encryption adds minimal latency (typically <100ms for message encryption, slightly more for large files). Users don't sacrifice speed for security.

Feature Preservation: Client-side processing enables features like search, smart replies, and AI assistance while maintaining encryption.

Addressing Common Concerns

"What if I forget my password?"

With zero-knowledge encryption, forgotten passwords mean lost data. We strongly encourage:

• Using password managers
• Creating optional encrypted key backups with separate strong passwords
• Understanding this trade-off is intentional—genuine security sometimes requires accepting consequences

"Does encryption prevent child safety measures?"

We implement child safety measures compatible with end-to-end encryption:

• Client-side scanning for known illegal content (CSAM) before encryption
• User reporting mechanisms for problematic content
• Cooperation with law enforcement within technical capabilities
• Transparent about what we can and cannot do

This balance is controversial but necessary—we won't compromise encryption while working within technical constraints to address legitimate safety concerns.

"Can law enforcement access data with warrants?"

Because we don't have decryption keys, we cannot provide plaintext data even with valid legal orders. We can provide:

• Encrypted data (useless without keys we don't have)
• Limited metadata we do possess
• Cooperation obtaining data from other sources where legal

This isn't about being above the law—it's about technical reality. We cannot provide what we don't possess.

"Does this make Tanqory a haven for criminals?"

End-to-end encryption benefits everyone:

• Activists in oppressive regimes
• Healthcare providers protecting patient privacy
• Businesses protecting trade secrets
• Journalists protecting sources
• Ordinary people deserving privacy

Yes, criminals also benefit. But we don't ban cars because criminals drive them, or phones because criminals call each other. The societal benefits of strong encryption vastly outweigh potential misuse.

Compliance and Regulations

End-to-end encryption helps meet regulatory requirements:

GDPR: Strong technical measures protecting personal data HIPAA: Required safeguards for protected health information CCPA: Technical measures ensuring data privacy Industry Standards: Meeting or exceeding PCI DSS, SOC 2, ISO 27001 requirements

We work with regulators globally to demonstrate that strong encryption and legitimate oversight can coexist within technical constraints.

The Path Forward

Encryption technology continues evolving:

Post-Quantum Cryptography: As quantum computers advance, we're preparing migration to quantum-resistant algorithms through hybrid approaches today.

Improved Key Management: Developing more user-friendly key recovery options that maintain security while reducing password loss risks.

Advanced Metadata Protection: Exploring techniques like onion routing and mixing networks to provide stronger metadata protection.

Formal Verification: Increasing use of formal methods to mathematically prove security properties of our protocols.

Standardization: Contributing to emerging standards for end-to-end encrypted collaboration platforms.

Our Commitment

Privacy is fundamental to Tanqory's mission. End-to-end encryption isn't a marketing feature—it's an architectural commitment we've designed our entire platform around. We cannot compromise your privacy because we've intentionally built systems where we don't have the capability to access your encrypted data.

This commitment comes with trade-offs: less convenience in some cases, inability to offer certain features common on unencrypted platforms, and limitations on law enforcement cooperation. We believe these trade-offs are correct because privacy matters profoundly.

Your communications, files, and information deserve protection not just from criminals and malicious actors, but from everyone—including us. With end-to-end encryption everywhere, we've made privacy the default, not an option.

Your data, your eyes only—and we can prove it.

For technical details about our encryption implementation, see our published specifications at security.tanqory.com/encryption or contact security@tanqory.com with questions