Post-quantum cryptography begins to enter corporate roadmaps
Although quantum computers capable of breaking current systems are not a general operational reality, migrating cryptography can require years.
News summary
Quantum computing continues to advance and, with it, interest in post-quantum cryptography grows. The risk is not that all current encryption will stop working tomorrow, but rather that large organisations need time to identify where they use cryptography and replace it in an orderly manner.
The first step is becoming known as crypto-agility: knowing which algorithms, certificates and protocols depend on systems that might require a future transition. In a modern company, cryptography appears in web connections, VPN, devices, applications, digital signatures, backup copies and third-party services.
There is also the scenario known as “harvest now, decrypt later”. An attacker could store encrypted information today in the hope of being able to read it in the future. This is particularly relevant for data that must remain confidential for many years.
For most SMEs, the priority is not to immediately replace their entire infrastructure. It is more reasonable to keep systems updated, avoid obsolete cryptographic technologies and ask critical providers for information regarding their future compatibility plans.
The challenge will be particularly significant for equipment with long lifecycles, such as industrial devices or embedded systems. If a product is to remain operational for a decade, it is advisable to consider now how its cryptographic components will be updated.
Preparing in advance allows a potential urgent change to be converted into a planned evolution.
A simple action involves asking strategic providers which standards and algorithms they use and whether their products support cryptographic updates. Recording these responses creates an initial snapshot of dependencies. One does not need to know all the mathematical details to begin managing the transition risk.
Why this matters to a company operating in Spain
The threat landscape affecting Spanish companies no longer distinguishes by size. Attacks are automated, sold as a service, and seek the shortest path: a reused credential, an unpatched server, or a provider with poorly controlled remote access. For an SME, the difference between a minor scare and a multi-day shutdown almost always depends on decisions made before the incident.
That is why every industry update should be read in operational terms: which specific controls would have prevented the problem, what evidence must be preserved, and who makes the decision when the clock is ticking. This is the approach we apply to managed cybersecurity projects at Seintec.
Real business impact
Before deciding on an investment, it is advisable to identify what is at stake. In cybersecurity projects, we typically review these four areas with management and the IT manager:
- Operational disruption: orders, invoicing, or production halted while systems are restored.
- Loss or exposure of personal data, with a mandatory 72-hour notification requirement to the AEPD.
- Hidden cost of recovery: overtime, external hiring, and loss of client trust.
- Contractual and compliance requirements (ENS, NIS2, ISO 27001) that demand evidence, not intentions.
Five-step action plan
A useful plan fits on one page. This is the roadmap we apply with our clients to move from news to measurable improvement, without disrupting daily operations:
- Inventory: identifying which systems, data, and providers are involved. Without an inventory, prioritisation is impossible.
- Assess the risk and the cost of doing nothing, in terms of downtime hours and euros.
- Defining the measurable objective: availability, response time, monthly cost, or compliance level.
- Implement in phases, starting with the system whose failure would hurt the business most.
- Verify with real testing and review indicators every quarter.
Key indicators you should be measuring
What is not measured is not managed. These indicators allow you to verify if the technological investment is yielding results and serve as the basis for the periodic reports we deliver to our clients:
- Mean time to detection (MTTD) and mean time to response (MTTR) for incidents.
- Percentage of endpoints with up-to-date patching and active EDR.
- MFA coverage for remote access and privileged accounts.
- Backup restorations verified within the last 90 days.
How we approach it at Seintec: Cybersecurity
We shield your company so it never stops. We operate from our own datacenter in Spain, with a certified technical team and a single point of contact who knows your infrastructure, so you do not have to explain your environment every time an incident arises.
These are the capabilities we bring to the table in a cybersecurity project:
- EDR / XDR: Advanced detection and response across endpoints and network.
- UTM perimeter security: Managed firewall and segmentation.
- Email filtering: Phishing, spam, and spoofing blocking.
- WAF: Protection of published applications and services.
- Immutable backup: Backups that ransomware cannot alter.
- MFA and identity: Conditional access based on user and device.
What you gain by working with a technology partner
Outsourcing does not mean losing control: it means gaining predictability, coverage, and independent technical insight. These are the benefits our clients highlight:
- Total prevent–detect–respond coverage: Immutable backup, email filtering, WAF, EDR/XDR, and UTM perimeter security in a single managed contract.
- Ensured continuity: Regain full control of your infrastructure in the event of a cyber incident in less than 4 hours.
- Zero Trust by design: Identity-based access control and MFA for any user and device.
- AI-powered defence: Machine learning engines that monitor endpoints and networks in real time and reduce the mean time to detection.
Frequently asked questions
- How do I know if my company is truly protected?
- With evidence: EDR coverage, two-factor authentication on all remote access, immutable copies, and a recently tested restoration. If any of these four points are not confirmed, there is a real risk of prolonged downtime.
- Where should a company wanting to address cybersecurity begin?
- With an audit of the current environment. At Seintec, we perform an initial no-cost review that identifies risks, dependencies, and priorities, resulting in a phased plan with fixed deadlines and budgets.
- Is it necessary to halt business operations during the project?
- No. We plan migrations and changes within agreed windows, with prior pilot tests and rollback options, ensuring disruption is minimal or non-existent for users.
- What type of companies do you serve?
- SMEs and mid-market companies in sectors such as industry, automotive, logistics, retail, legal, and healthcare, with both on-premises and hybrid cloud infrastructure.
- What coverage and response times (SLA) do you offer?
- Support from Monday to Friday, 09:00 to 18:00, and 24x7 emergencies 365 days a year, with a committed response SLA and a 99.98% service SLA in 2025.
Seintec can help you inventory cryptographic dependencies and include post-quantum readiness within your technology strategy without making premature investments. Contact us if you want to understand which parts of your business should start preparing.
Contact SeintecRelated service
Cybersecurity
We shield your company so it never stops.