| Yubico YubiKey 5C NFC
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Security Grade
Calculator v1
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Yubico YubiKey 5C NFC
Release Date: 2019-08-20 • Status: In sale
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Security Evaluation
1. Device Security
| Criterion
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Value
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Proof
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Comment
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| Known hardware tampering
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None
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🔗 Proof
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| Known vulnerabilities
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None
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🔗 Proof
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| Prior attacks
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None
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🔗 Proof
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| Updatability
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Very common
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🔗 Proof
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| Category Score
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Score: 1 / 3
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2. System Security
| Criterion
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Value
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Proof
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Comment
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| Authentication with other systems
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Full
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🔗 Proof
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| Communications
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Encrypted with up-to-date encryption
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🔗 Proof
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| Storage
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Encrypted with up-to-date encryption
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🔗 Proof
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| Category Score
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Score: 1 / 3
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3. User Authentication
| Criterion
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Value
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Proof
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Comment
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| Account management
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Full
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🔗 Proof
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| Authentication
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Secure
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🔗 Proof
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| Brute-force protection
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Exist
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🔗 Proof
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| Event logging
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Access event logged
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🔗 Proof
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| Passwords
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Require change after setup with complexity requirements
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🔗 Proof
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| Category Score
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Score: 1 / 3
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Technical Specifications
| Property
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Details
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| Operating System & App
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Proprietary YubiOS firmware (Companion App: Yubico Authenticator (iOS/Android/Desktop))
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| Hardware (CPU / GPU)
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CPU: Secure element microcontroller • GPU: None
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| Memory & Storage
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Memory: Secure flash memory • Storage: Internal secure element
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| Power, Battery & Charging
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Battery: None (powered via USB or NFC field) • Power: USB-C connector or NFC • Charging: Not applicable
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| Display & Camera
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Display: None • Camera: None
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| Sound & Connectivity
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Sound: None • Connectivity: USB-C, NFC
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| Physical (Dimensions & Mass)
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Dimensions: 18 × 45 × 3.3 mm • Mass: 3 g
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The YubiKey 5C NFC is a hardware security key that provides strong two-factor, multi-factor, and passwordless authentication. Supporting USB-C and NFC, it works across laptops and smartphones, making it versatile for both enterprise and personal security. Unlike typical IoT gadgets, it is purpose-built for identity protection and uses a secure element microcontroller to resist tampering. Its firmware is not upgradable by design, reducing attack vectors.
