Gigamon is warning organizations to accelerate preparations for quantum era cybersecurity threats, highlighting growing risks tied to encrypted data and emerging attack techniques. The alert follows findings from Gigamon’s upcoming 2026 Hybrid Cloud Security , which gathered insights from 1,000 security leaders worldwide. According to the research, 35% of organizations now view encrypted traffic as their top breach risk, while 87% are concerned about “harvest now, decrypt later” attacks where adversaries collect encrypted data today with the intention of decrypting it once quantum computing capabilities mature.
Gigamon emphasized that the threat is no longer theoretical. As quantum computing advances, current cryptographic standards could become vulnerable, potentially exposing sensitive data that was previously considered secure. Despite rising concern, the company identified a significant readiness gap. Survey results show that 76% of organizations still believe their encrypted data is inherently secure, even as industry discussions increasingly highlight the limitations of existing encryption in a post-quantum future.
Chaim Mazal, Chief AI and Security Officer at Gigamon, said organizations must begin integrating post-quantum planning into their broader cybersecurity strategies. He noted that proactive steps such as asset inventory, security architecture updates, and adopting zero trust models can help organizations better manage the transition. Gigamon also pointed to the broader implications of quantum threats beyond data confidentiality. According to Ian Farquhar, Security CTO at the company, compromised cryptographic keys could undermine the integrity of digital identities, transactions, and signatures.
He warned that organizations should not only consider “harvest now, decrypt later” scenarios, but also the possibility of “harvest now, forge later” attacks, where attackers could manipulate or falsify trusted digital interactions once encryption is broken.
Farquhar compared the current moment to the lead-up to the Y2K transition, suggesting that even if the immediate impact of quantum computing remains uncertain, the scale of required modernization makes early action essential. The company stressed that many organizations still rely on legacy cryptographic algorithms embedded deeply within systems, applications, and infrastructure. Replacing or upgrading these technologies is complex and requires coordination across multiple teams, including security, IT, compliance, and legal functions.
Gigamon advocates for the development of “cryptographic agility” the ability to quickly update encryption methods as new threats emerge. This involves identifying where encryption is used, understanding current algorithms, and designing systems that allow for seamless updates without disrupting operations.
The growing focus on quantum risk also intersects with current challenges around encrypted traffic visibility. As more enterprise data is encrypted, security teams face increasing difficulty in monitoring threats without compromising privacy or performance.
Gigamon’s findings suggest that while awareness of these risks is rising, many organizations have yet to implement concrete plans for post-quantum security. The company recommends establishing dedicated internal teams to oversee cryptographic transitions and ensure vulnerable technologies are not left unaddressed. As quantum computing continues to evolve, Gigamon argues that organizations must treat post-quantum readiness as an immediate priority one that will shape the future of cybersecurity, data protection, and digital trust across industries.
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