Blockchain Security

Blockchain network participants require assurance that each user is authenticated and each transaction is valid

Blockchain technology represents significant new opportunities to transform the way data is shared and value is transferred, but along with its benefits come new challenges. One of the primary roadblocks to blockchain’s broader adoption is the resolution of a critical issue: security.

As organizations continue to find new and innovative use cases for blockchain, security must be kept top of mind. Only by establishing that each user is an authorized participant of a distributed ledger, and that each transaction submitted to the blockchain is digitally signed, can we advance our use of this transformative technology and reap the rewards it promises.

Thales eSecurity can help your organization secure its digital transformation and confidently use blockchain through strong authentication, digital signatures, hardened security for root keys and more.

Authenticating Participants

Before individuals are allowed to participate in a distributed ledger, they must be authenticated using highly secure methods.

Trusting Transactions

Participants of a network need assurance that each transaction can be trusted. Otherwise, trust in the network itself will be in question.

Securing the Keys

While blockchain technology itself has proved tamper-resistant, cryptographic keys are essential to secure access to a distributed network and ensure transactions are valid. These keys can become vulnerable and stolen via network breaches, as seen in the attacks on cryptocurrency exchanges in recent years.

Strong Authentication

Similar to banking and other industries, establishing trust in a blockchain network depends on strong authentication of participating users and devices, underpinned by cryptographic processes. Organizations worldwide rely on Thales nShield HSMs as the foundation of their high-assurance user authentication methods.

Digital Signatures

Transactions submitted to the blockchain are digitally signed using a private key to confirm that the entry comes from the user and to prevent any alterations. Thales nShield HSMs protect the underlying root keys that are used for the issuance and revocation of private keys.

Hardened Security for Root Keys

Thales nShield HSMs provide FIPS-certified, tamper-resistant protection for the root keys that underpin network user authentication and transaction validation. Field-proven nShield HSMs are available in a range of form-factors and performance levels to suit particular environments.

Delivering the Root of Trust

Thales HSMs provide a strong root of trust for the keys and cryptographic operations that enable organizations to build, deploy, and operate blockchain-based transaction networks with confidence.


nShield HSMs provide leading protection for root keys that fulfills even the most stringent security requirements.


nShield HSMs can be clustered for greater performance and availability, enabling the scalability of blockchain operations without sacrificing security.

Stronger Compliance

nShield HSMs meet FIPS 140-2 Level 3 and Common Criteria EAL 4+ certifications, meaning organizations in highly regulated environments can execute on blockchain strategies while satisfying compliance requirements.

Solution Brief : Blockchain security made simple; the key to HSM integration

Thales and Accenture help organizations build secure blockchain business applications.


Video : Blockchain security with Jon Geater, CTO

Thales eSecurity’s CTO discusses the need for security with blockchain implementations.

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Data sheet : nShield Connect

nShield HSMs generate and store the root keys that underpin distributed ledger networks in FIPS-certified, tamper-resistant hardware.


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