Is Tangem Safe? Independent Security Results and Certifications (2026)

The short answer is yes. But "yes" without evidence is just a marketing claim, and security claims deserve better than that. This article walks through the actual proof: what hardware-wallet safety requires, what certification Tangem's chip holds, which independent firms audited it, and what they found, and where the real risks still lie, because no wallet eliminates every risk.

What "Safe" Means for a Hardware Wallet

Crypto is a bearer asset. Whoever holds the private key controls the funds, full stop. There's no bank to call, no password reset, no fraud department. That makes the question "Is this wallet safe?" really two separate questions. First: can the private key be extracted by an attacker? Second: can the user lose access through their own mistakes?

A hardware wallet addresses the first question by keeping the private key offline and inside a dedicated security chip, where it never touches an internet-connected device. The app sends unsigned transaction data to the device; the device signs it internally; the signed transaction is returned to the app for broadcast. The key stays put throughout.

This matters because online wallets keep keys on internet-connected devices, which exposes them to hacking, phishing, malware, and platform failures. In H1 2024, roughly $1.38 billion was stolen through crypto thefts, nearly double the figure for the same period in 2023. A 2025 study reported incident rates of under 5% for hardware-secured wallets, compared with over 15% for software-only wallets. Hardware security is not theoretical. The numbers reflect it.

A Hardware Wallet Is "Safe" When

Five criteria determine whether a hardware wallet actually earns the label.

Tangem meets all five. Here is the evidence.

What It Requires

The core principle behind cold storage is simple: the private key never touches the internet. That's not a software setting. It's an architectural constraint. The transaction signing flow works like this: the app prepares unsigned transaction data, the user taps the card, the secure element signs internally, and the app broadcasts the signed result to blockchain nodes. At no point does the private key leave the chip or reach an internet-connected environment.

Say you send 100 USDT from Tangem to another wallet. The app prepares the unsigned transaction, the card signs it internally, and only the signed result returns to the phone. Cold storage also protects against phishing and malware at a structural level. Even if a user clicks a malicious link on their phone, the funds held in cold storage remain unreachable, because the attacker cannot reach the key. No connection, no compromise.

Self-custody gives the user full control. No exchange holds the keys. No platform can freeze the account, go insolvent, or be subject to a regulatory seizure. That control is the whole point, and cold storage is how it holds.

What Is EAL6+?

EAL6+ stands for Evaluation Assurance Level 6+, a certification level within the Common Criteria framework (formally ISO/IEC 15408). Common Criteria is the internationally recognized standard for independent IT security evaluation.

EAL6 denotes a "semi-formally verified design and tested" product, intended for high-assurance security targets protecting high-value assets against significant risks. The "+" indicates the evaluation was augmented with additional assurance requirements beyond the base EAL6 package. EAL7 is the highest defined level in the framework, but EAL6 and EAL6+ represent the practical upper bound for complex real-world products. EAL7's requirements are rarely achievable outside narrowly scoped, specialized designs. Real-world uses of EAL6+ certified chips include biometric passports and international payment cards.

Tangem's chip: the Samsung S3D350A secure element, certified to EAL 6+ of the Common Criteria. Tangem's product documentation describes this as the same security standard used in biometric passports and international payment cards, developed in partnership with Samsung Semiconductor, with no backdoors.

The private key is generated on-chip during activation and never leaves the card under any circumstances. Keys cannot be extracted or duplicated, even with physical access. All cryptographic signing happens on-chip. The chip also includes multiple tamper-resistance sensors: a laser, a temperature sensor, a light sensor, and a power sensor. Tangem's security architecture describes physical attacks as triggering chip-level failure before a successful extraction could occur. The firmware is factory-installed and non-updatable. That's a deliberate design choice: it eliminates remote exploit vectors that rely on malicious firmware updates.

Why Most Hardware Wallets Don't Have EAL6+

EAL6+ certification requires significantly more complex design and evaluation than lower levels. The Common Criteria evaluation involves accredited independent testing laboratories, and the cost and development time increase substantially at each level. Many manufacturers stop at EAL5+, which is already considered strong protection for cold-storage use.

There's also a functionality tradeoff. The strict certification profile at EAL6+ can limit how a chip is used and updated, so wallet makers may prioritize flexible architectures over pushing from EAL5+ to EAL6+. Here's where the major competitors sit. Ledger Nano X uses an ST33 secure element certified at EAL5+. Ledger's Nano S Plus and Stax models use EAL6+ certified secure elements. Tangem's EAL6+ certification for the Samsung S3D350A applies across the product line, not just to the premium tier.

What These Audits Mean

Certification establishes what the chip can withstand. Audits verify that the firmware and protocols running on it are free of malicious code.

• Kudelski Security is a global cybersecurity firm specializing in embedded systems and cryptographic protocols. In 2018, Kudelski audited Tangem's card firmware and found no vulnerabilities.

   

• Riscure specializes in hardware security testing, including side-channel analysis and fault injection attacks against secure elements. In 2023, Riscure assessed the Tangem Wallet's hardware security and confirmed that no vulnerabilities existed.

That's the distinction between "we say we're secure" and "credible third parties have tested us and documented the results."

The Tangem app for iOS and Android is also open source on GitHub, enabling independent community review of the software layer. Independently audited firmware addresses software integrity; the secure element addresses tampering and side-channel resistance. These are separate layers, and Tangem has covered both. Tangem's security architecture also maintains an ongoing bug bounty program for responsible disclosure.

The track record reflects all of this. Tangem has produced over 8 million devices since 2018 and maintains a zero-hack record: no successful hacks or user fund losses have been reported during that deployment.

How Tangem Cards Prove They Are Genuine

Tangem also checks the card before you use it. Each Tangem card has its own key pair for authenticity verification. When you tap a new card, the app checks the card's and firmware's authenticity before any wallet operation begins. The practical point is simple: a counterfeit card should fail verification before you deposit funds.

This matters because supply-chain trust is part of wallet safety. A secure chip is only useful if the user can confirm the card in hand is genuine. Tangem's anti-counterfeit flow gives the app a way to check that before the card starts protecting real money.

What Tangem CANNOT Protect Against

Honest disclosure is part of a trustworthy security narrative.

• Physical coercion. If someone forces you to tap your card and enter your access code, they access your funds. No hardware wallet protects against this. It's a user-side risk, not a hardware failure.
• Lost cards with no backup. Tangem uses a seedless backup model by default: 2 or 3 cards share the same private key, and any card provides full wallet access. If all cards are lost and no seed phrase was set up, access is permanently gone. Tangem itself cannot recover funds in this scenario. The security architecture is explicit: losing all cards with no seed phrase makes funds permanently inaccessible.
• User error on addresses. Hardware wallets confirm the destination address before signing, but they cannot prevent a human from approving a wrong address. Sending to an incorrect address is irreversible on most blockchains.
• Weak access codes. Tangem's access code must be 6 characters or more, and progressive delays kick in after 6 failed attempts. But a simple code like "123456" provides minimal protection against anyone who obtains your card. The architecture is strong; the access code is only as strong as the user makes it.
• No desktop or web interface. Tangem is mobile-only. The app has no desktop or web version. For users who prefer desktop-native workflows, this is a real limitation.

These are user-side risks. Tangem's hardware security record is clean.

Honest Disclosure Is Part of a Trustworthy Security Narrative

Self-custody eliminates counterparty risk but shifts responsibility to the user. No provider-managed recovery exists if keys are lost. That's the tradeoff: full control in exchange for full responsibility.

Tangem's seedless architecture removes the seed phrase as a single point of failure. Common seed-phrase failure modes include losing or damaging paper backups, having digital storage compromised, and forgetting storage locations. With Tangem's multi-card model, the backup is the physical cards themselves, stored in separate locations, each providing full access.

The standard practice is still worth stating plainly: keep a small spending amount in a hot wallet for active use, and move the bulk of holdings to cold storage. A hot-wallet compromise should not affect long-term savings. Best practice for any cold-storage setup includes testing recovery procedures before storing significant amounts, backing up at least 2 copies to physically separate locations, and never storing private keys or access codes digitally.

Final Verdict

Tangem's safety is documented, not asserted. The Samsung S3D350A secure element holds EAL6+ certification under Common Criteria. Independent audits by Kudelski Security in 2018, Riscure in 2023, and Cure53 in 2026 found no vulnerabilities. The firmware is factory-installed and non-updatable, eliminating remote firmware exploit vectors. Over 3 million devices have been deployed with no successful hacks reported.

The real risks are user-side: losing all backup cards, using a weak access code, or approving a wrong address. Hardware security handles the hardware threat model. The rest is up to the user. If you're evaluating hardware wallets, the evidence for Tangem is specific, sourced, and verifiable.