A security IC is a hardware component designed to protect keys, identities and cryptographic operations. It can provide a stronger root of trust than software-only storage, but the protection level depends on the device architecture, provisioning process and complete system design.
Start with the threat model
Define the assets, likely attackers, physical access, network exposure and consequences of compromise. A consumer accessory, industrial controller, payment terminal and automotive module have different assurance, lifecycle and certification needs.
Secure elements
A secure element combines protected memory, cryptographic functions and resistance to physical attacks. It is commonly used for device identity, authentication, key storage and certificate operations. Interfaces may include I2C, SPI, one-wire or application-specific protocols.
Trusted platform modules
A TPM supports measured boot, platform identity, sealed storage and attestation in computers and embedded systems. Discrete TPMs provide a separate hardware boundary, while firmware and integrated implementations have different cost and attack-surface tradeoffs.
Hardware security modules and embedded roots
Larger systems may use a dedicated hardware security module, while microcontrollers and processors can include secure enclaves, isolated key stores or cryptographic accelerators. Compare the isolation boundary, debug controls, update path and resistance to fault and side-channel attacks.
Cryptographic functions
Check the required algorithms, key sizes, random-number generation, hashing, signatures, authentication and secure counters. Confirm performance at the expected transaction rate and verify that supported algorithms align with the product’s planned lifetime.
Provisioning and key ownership
Security depends on how keys and certificates are created, injected, backed up and rotated. Define whether provisioning occurs at the semiconductor vendor, module supplier, contract manufacturer or product owner. Control access, audit records and recovery procedures across the chain.
Interface and host integration
Confirm voltage, package, bus type, addressing, driver support and host software. Review how the host authenticates commands, protects sessions and handles errors. A secure IC cannot compensate for exposed keys or insecure update logic elsewhere in the product.
Certification and assurance
Some products require Common Criteria, FIPS, payment, mobile, automotive or industry-specific evidence. Check the exact certified configuration and certificate status; a component family name alone may not cover the selected variant, firmware or use case.
Lifecycle and update planning
Security products need long-term availability, vulnerability response and controlled firmware or configuration updates. Review product-change notices, end-of-life policy, rollback protection and the ability to revoke or replace credentials in deployed devices.
Security IC selection checklist
- Threat model and protected assets defined
- Root-of-trust boundary appropriate to the product
- Algorithms, key sizes and performance verified
- True random-number and secure storage functions reviewed
- Provisioning and key ownership documented
- Host interface, drivers and secure update path validated
- Required certification matched to the exact device
- Lifecycle, vulnerability and credential-revocation plans accepted
For sourcing programmable and security-related devices, review our active component capabilities. To evaluate a specific ordering code, send Informic the package, interface, certification and lifecycle requirements.
