Security at the core

Security starts with architecture, not marketing

Cryptocurrency security is unforgiving. Transactions are irreversible, private keys are the single source of control, and a single weakness can lead to permanent loss of funds. Tangem treats security as the foundation of the product rather than a feature layered on top later. The design philosophy is simple: minimize trust assumptions, isolate private keys, and make verification possible through public evidence.

Tangem's security model combines three layers: hardware protection, cryptographic isolation, and continuous security operations. Together, those layers create a system where private keys remain under user control while independent researchers and auditors can validate the company's claims.

Hardware Security

At the core of the Tangem wallet is a certified secure element designed for cryptographic workloads. Private keys are generated on the card and stored inside an isolated environment rather than in general-purpose memory. That secure element is built to resist invasive and non-invasive attacks, including tampering, probing, and fault injection attempts. The hardware foundation is meant to reduce the attack surface before any app-level protections are considered.

Tangem also relies on immutable firmware principles for the card environment. That matters because firmware mutability can introduce an entire class of post-deployment risk. By constraining what can change and where cryptographic operations happen, Tangem reduces the number of moving parts that can be exploited. Independent hardware-focused review is available in the security audits section.

Cryptographic Design

Tangem uses a zero-knowledge architecture: private keys are generated on the card, stay on the card, and are used on the card for signing. The signing flow sends unsigned transaction data to the secure element, performs cryptographic signing internally, and returns only the signed payload. Tangem itself has no mechanism to extract or reconstruct user keys.

This model is stronger than relying only on app permissions or device storage. It separates transaction orchestration from key custody. It also narrows the consequences of a compromised phone because the most sensitive operation—signature creation—still happens inside the secure environment. Public-facing audit references and release documentation reinforce that this is not just a conceptual claim but an implementation approach that can be checked.

Continuous Security

Security is not finished once hardware ships. Tangem maintains trust through recurring audits, public release documentation, and external research channels. Independent firms such as Cure53, Riscure, and Kudelski Security reviewed different parts of the stack, from mobile wallet behavior to hardware and smartcard code. Those results are summarized on the Audits page.

Tangem also documents product evolution through a dedicated changelog. That matters because "secure" products that do not show maintenance history are hard to trust. The changelog is not just a product feed; it is evidence of active security stewardship, feature hardening, and bug resolution over time.

Community participation strengthens this model further. Tangem's bug bounty program gives external researchers a formal path to report vulnerabilities responsibly. Incident response is part of the same transparency model: issues are assessed, fixes are prioritized, and communication is made public when needed. Example: on December 31, 2025, Tangem documented a log isolation enhancement as part of its public security maintenance narrative.

Why this matters

Tangem's security story is credible only if users and third parties can verify it. Certified hardware alone is not enough. Audit evidence without active maintenance is not enough. A changelog without architectural discipline is not enough. The value comes from the combination: secure hardware, on-card cryptography, independent validation, and visible ongoing improvement.