In today’s digital ecosystem, cryptography forms the backbone of trust. From online banking and government systems to cloud infrastructure and IoT devices, cryptographic modules protect sensitive data against unauthorized access and cyber threats. However, merely implementing encryption is not enough. Organizations must ensure that cryptographic implementations are secure, validated, and compliant with internationally recognized standards.

What is FIPS 140-3?

FIPS 140 series is a well-known standard in the field of cryptography. FIPS stands for Federal Information Processing Standard and it basically provides security requirements for cryptographic modules. This standard is mandated by the US and Canada for compliance with products that use cryptography. Although, many other governments use this standard for evaluating crypto-based products.

The standard is published by the National Institute of Standards and Technology (NIST) and is used by federal agencies, defense organizations, financial institutions, cloud service providers, and security product vendors worldwide.

FIPS 140-3 officially supersedes FIPS 140-2 and aligns more closely with international standards such as ISO/IEC 19790 and ISO/IEC 24759. This standard specifies four levels of security levels for each of the 11 requirements areas.

Why FIPS 140-3 Matters

Modern cybersecurity threats target cryptographic implementations directly. Weak key management, insecure firmware, improper entropy generation, and side-channel attacks can compromise otherwise strong encryption algorithms.

FIPS 140-3 addresses these concerns by defining rigorous security requirements for:

• Cryptographic algorithms
• Key generation and storage
• Physical security
• Authentication mechanisms
• Firmware integrity
• Self-tests
• Entropy sources
• Operational environments

Products validated under FIPS 140-3 provide assurance that their cryptographic functions have undergone independent testing through accredited laboratories.

Key Objectives of FIPS 140-3

The primary objectives of the standard are:

• Enable internationally aligned cryptographic evaluations
• Ensure cryptographic modules are securely designed and implemented
• Reduce vulnerabilities in cryptographic systems
• Standardize security assurance levels
• Provide confidence for government and enterprise deployments

What is a Crytographic Module?

A cryptographic module is the hardware, software, firmware, or combination thereof that implements cryptographic functions such as:

• Encryption
• Decryption
• Digital signatures
• Hashing
• Key generation
• Random number generation

Examples include:

• Hardware Security Modules (HSMs)
• Trusted Platform Modules (TPMs)
• VPN gateways
• Smart cards
• Secure boot modules
• Cryptographic libraries
• Embedded IoT security chips
• Cloud encryption services

Related Standards: FIPS 140-3

ISO/IEC 19790: 2025 provides security requirements for cryptographic modules.

ISO/IEC 24759: 2025 provides Derived Testing Requirements (DTRs).

ISO/IEC 20543: 2019 provides security techniques for Test and analysis methods for random bit generators within ISO/IEC 19790 and ISO/IEC 15408.

ISO/IEC 29128-1:2023 provides a framework for the verification of cryptographic protocols.

ISO/IEC 18367:2016 provides Security techniques for cryptographic algorithms and security mechanisms conformance testing.

ISO/IEC 17825:2024 provides security techniques for testing methods for the mitigation of non-invasive attack classes against cryptographic modules.

ISO/IEC TS 30104:2015 provides security techniques for Physical Security Attacks, Mitigation Techniques, and Security Requirements.

NIST SP 800-140 series serves as the requirements of CMVP.

The list of NIST 800-140 series is listed below:

(1) NIST SP 800-140: FIPS 140-3 Derived Test Requirements (DTR)

(1) NIST SP 800-140A: Vendor Documentation Requirements for eleven requirements (ISO Annex A)

(2) NIST SP 800-140B: Module Security Policy Requirements (ISO Annex B)

(3) NIST SP 800-140C: Approved Security Functions such as block ciphers, asymmetric encryption, MAC, key management, random bit generation, etc. (ISO Annex C)

(4) NIST SP 800-140D: Sensitive Security Parameter Key Generation and Sensitive Security Parameter Key Establishment (ISO Annex D)

(5) NIST SP 800-140E: Approved Authentication Methods (ISO Annex E)

(6) NIST SP 800-140F: Approved non-invasive attack mitigation test metrics (ISO Annex F)

FIPS 140-3 Requirements and Security Levels

Security Level	Security Objective	Key Requirements	Authentication Type	Physical Security	Typical Use Cases
Level 1	Provides basic cryptographic security	Approved cryptographic algorithms and production-grade components	Not mandatory	Minimal or no specific physical protection	Software cryptographic libraries, low-risk commercial applications
Level 2	Adds tamper evidence and operational protection	Role-based authentication, tamper-evident coatings or seals	Role-based authentication	Tamper-evident mechanisms required	Enterprise security appliances, network devices, VPN gateways
Level 3	Protects against unauthorized physical access and stronger attacks	Identity-based authentication, separation of interfaces, CSP protection	Identity-based authentication	Tamper-resistant mechanisms with stronger protections	Hardware Security Modules (HSMs), payment systems, government systems
Level 4	Provides highest level of protection against sophisticated attacks	Complete environmental attack protection, automatic zeroization on tampering	Identity-based authentication	Full tamper detection and response mechanisms	Military systems, critical infrastructure, national security applications

(1) Public Security Parameters (PSP)

Public Keys, certificates, etc.

(2) Critical Security Parameters (CSP)

Secret and Private cryptographic keys, authentication data, etc.

(3) Sensitive Security Parameters (SSP)

It includes both PSPs and CSPs. Automated SSP transport or SSP agreement using approved methods.

(4) Confidentiality and integrity-related requirements with CSPs

(5) Only integrity-related requirements for PSPs

(6) Pre-Operational self-tests

(7) Periodic self-tests

(8) Conditional fault test: Self-test must fail on detecting a fault in a cryptographic algorithm.

(9) Vendor Testing is required at all levels.

(10) Low-level testing is required at SL3 and SL4

(11) End of Life: SL1 requires a procedure for secure sanitization while SL3 and SL4 require a procedure for secure destruction of the module.

Implementation Schedule

Date	Activity
March 22, 2019	FIPS 140-3 Approved
September 22, 2019	FIPS 140-3 Effective Date Draft of SP 800-140x available for public comment
March 22, 2020	Publication of SP 800-140x series
September 22, 2020	CMVP accepts FIPS 140-3 submission
September 21, 2021	CMVP stops accepting FIPS 140-2 for new certificates
September 22, 2026	Remaining FIPS 140-2 certificates move to the Historical list

Conclusion

FIPS 140-3 is more than a compliance requirement—it is a globally respected benchmark for cryptographic assurance. By aligning with international standards and addressing modern attack vectors, it provides organizations with confidence that their cryptographic implementations are secure, reliable, and trustworthy.

For governments, enterprises, cloud providers, and security product vendors, FIPS 140-3 validation has become a critical component of cybersecurity assurance and regulatory compliance.

As digital trust becomes increasingly important, understanding and implementing FIPS 140-3 correctly will remain essential for secure system design and deployment.