Western Digital integrates quantum-resistant security into HDDs

SAN JOSE, Calif. - Western Digital Corporation (NASDAQ:WDC) announced today the integration of post-quantum cryptography into its Ultrastar UltraSMR hard disk drives, which are currently in qualification with multiple hyperscale customers. The move comes as the company, with a market capitalization of $166 billion, continues to strengthen its position in the enterprise storage market amid impressive revenue growth of 32% over the last twelve months.

The Ultrastar DC HC6100 UltraSMR drives incorporate NIST-approved quantum-resistant algorithms designed to protect device trust chains and firmware integrity. The implementation uses ML-DSA-87 (NIST FIPS 204) for code signing, combined with dual-signing using RSA-3072.

The technology addresses concerns about "harvest now, decrypt later" attacks, where adversaries collect encrypted data with the intent to decrypt it once quantum computing capabilities advance. The security features focus on protecting firmware integrity and key management rather than data-at-rest encryption.

"Quantum computing represents one of the most significant technology transitions of our time, and it is advancing faster than many organizations anticipate," said Dr. Xiaodong (Carl) Che, Chief Technology Officer at Western Digital. "Integrating post-quantum cryptography into our Ultrastar enterprise-class drives is part of our commitment to helping customers stay ahead of threats that are already present in the form of HNDL attacks."

The implementation includes PQC-capable public key infrastructure and hardware security module workflows to support key issuance, rotation, and lifecycle management. The dual-signing approach is designed to support deployment across diverse fleets without disrupting current operations.According to InvestingPro data, 17 analysts have revised their earnings upwards for the upcoming period, reflecting confidence in Western Digital’s strategic initiatives. The company maintains a "GREAT" financial health score, with analysts anticipating continued sales growth. For deeper insights into WDC’s valuation and growth prospects, investors can access the comprehensive Pro Research Report, available for this and 1,400+ other US equities.

Western Digital stated it expects to expand PQC capabilities across additional enterprise hard drive product lines over time. The information is based on a press release statement issued by the company today.

Enterprise storage infrastructure typically remains in service for five years or longer, a timeframe that may overlap with the emergence of cryptographically relevant quantum computers, according to the company.

In other recent news, Western Digital Corporation reported its fiscal third-quarter earnings for 2026, surpassing analyst expectations. The company posted an earnings per share (EPS) of $2.72, which exceeded the forecasted $2.36, resulting in a 15.25% positive surprise. Revenue for the quarter reached $3.34 billion, surpassing the anticipated $3.23 billion. In another development, Western Digital entered into exchange agreements with institutional investors to receive 1,865,801 shares of its common stock in exchange for 653,203 shares of Sandisk Corporation common stock. These exchanges are expected to settle in May 2026, pending customary closing conditions. The company’s financial results highlight strong demand across its business segments, especially in cloud storage solutions. These recent developments provide a comprehensive picture of Western Digital’s ongoing activities and financial performance.

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