SEGGER emSecure & emBoot-Secure
Embedded SoftwareDigital signature verification for firmware authentication with RSA/ECDSA support, secure boot chain implementation, and rollback-protected firmware updates via emBoot-Secure. Buy in India from GSAS.
Signatures
RSA, ECDSA verification
Secure Boot
Chain-of-trust validation
Firmware Update
Rollback protection
Verification
On-device, no network needed
Key Management
Asymmetric key pairs
License
Royalty-free
Overview
About emSecure & emBoot-Secure
SEGGER emSecure provides digital signature verification for embedded systems that must authenticate firmware, configuration data, or any binary payload before allowing it to execute or take effect. Using asymmetric cryptographic signatures, emSecure ensures that only firmware signed by the authorized private key can pass verification on the target device, protecting deployed products against unauthorized modifications, counterfeit firmware, and supply chain injection attacks. For Indian OEMs shipping connected devices into regulated markets, emSecure provides the cryptographic foundation required to demonstrate firmware integrity compliance.
Supported Algorithms
| Category | Algorithm | Key Sizes / Curves | Purpose |
|---|---|---|---|
| Digital Signatures | RSA-PSS | 1024, 2048, 4096 bit | Firmware image authentication |
| ECDSA | NIST P-256, P-384, P-521 | Compact signatures for constrained devices | |
| EdDSA (Ed25519) | Curve25519 | High-performance signature verification | |
| Hash Functions | SHA-256 | 256-bit digest | Firmware integrity check |
| SHA-384 / SHA-512 | 384/512-bit digest | Extended integrity verification | |
| Key Management | Asymmetric key pairs | RSA or ECC | Offline signing, on-device verification |
Secure Boot with emBoot-Secure
emBoot-Secure extends this capability into a complete secure boot and firmware update solution. At power-on, emBoot-Secure validates the firmware image signature before transferring execution, establishing a chain of trust from the boot ROM through the application code. The integrated firmware update mechanism supports field updates with automatic rollback protection, if a new firmware image fails validation or does not boot successfully, the device reverts to the last known-good image, preventing devices from being bricked by interrupted or corrupted updates in the field.
Air-Gapped and Offline Operation
Watch the SEGGER emSecure introduction
The entire emSecure and emBoot-Secure stack operates on-device without requiring network connectivity for signature verification, making it suitable for air-gapped industrial controllers, automotive ECUs, and military-grade systems. Key generation and signing happen offline using standard tools, while the lightweight on-device verifier fits within the resource constraints of Cortex-M class microcontrollers. Royalty-free licensing means that securing every unit with a verified boot chain adds no per-device cost to the bill of materials.
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Common questions about emSecure & emBoot-Secure
What is SEGGER emSecure?
Is emSecure royalty-free?
Which SEGGER middleware for secure boot or firmware authentication?
Can I buy SEGGER emSecure in India?
Does emSecure work without network connectivity?
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