Your quantum risk starts before Q-Day arrives.
Attackers can capture encrypted information today and decrypt it later. See where vulnerable cryptography hides, prioritize what matters most, and become Quantum Ready before Q-Day — not after.
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Enterprise sessions · TLS 1.3 · X25519 · ECDSA
Adversary archive
Encrypted — safe today
A silent copy of handshakes and ciphertext is written to storage. Nothing looks wrong. Nothing alerts.
Quantum in 60 seconds
What quantum computing actually threatens — and what it does not.
No cryptographically relevant quantum computer exists today, and nobody can name an exact Q-Day. What can be described precisely is which mathematical assumptions change.
1 · Classical security
RSA and ECC rest on mathematical problems that are extremely expensive for classical computers to solve.
2 · Quantum capability
A sufficiently capable fault-tolerant quantum computer running Shor's algorithm changes the economics of exactly those problems.
3 · Result
The security assumption underneath RSA and ECC no longer provides the protection it was chosen for.
| Technology | Quantum impact |
|---|---|
| RSA | Vulnerable to Shor's algorithm |
| Diffie-Hellman | Vulnerable to Shor's algorithm |
| ECC / ECDH / ECDSA | Vulnerable to Shor's algorithm |
| AES | Affected differently; larger keys retain strong protection |
| Modern hashes | Affected differently; not subject to the same structural break |
Guided assessment
Scope your environment, score your Q-Day risk, brief your leadership
Four short steps map where quantum-vulnerable cryptography lives in your estate and how exposed it is before Q-Day. Add your own logo and colors, then export a board-ready PDF.
Organization profile
Sets the regulatory backdrop and the size of the certificate estate we plan around.
Primary industry
Certificate estate size
Public plus private TLS, code signing, device and user certificates.
Step 1 of 5
Your exposure
The real deadline is organizational, not astronomical.
The question is not when a quantum computer arrives. It is whether your data shelf life plus your migration time overlaps a plausible threat window.
How long must your most sensitive data remain confidential?
5–10 yearsHow long would a cryptographic migration take across your organization?
2–3 yearsHow difficult is your environment to change?
Your planning horizon
Protected until ~2036
Sensitive data selected today may need protection until roughly 2036. With your migration profile, cryptographic decisions made now would still be in force around 2030 — inside the window where cryptographic assumptions may have to change.
Qualitative urgency
Qualitative by design. No mathematical certainty is implied, and no exact Q-Day is predicted.
Harvest now, decrypt later
The attacker does not need a quantum computer today.
They may only need your encrypted traffic today. Record the handshake, keep the ciphertext, and wait for the mathematics to change.
Client
Browser · service · device
X25519 (ECDHE)
Server
TLS 1.3 termination
Adversary archive
Captured: public handshake + encrypted traffic · stored indefinitely
Unreadable today. Valuable later.
Someone copies your encrypted traffic now and stores it. Later, when the mathematics gets cheaper, they open it. Anything that must stay secret for a long time is already exposed.
The attacker does not need a quantum computer today. They may only need your encrypted traffic today.
Quantum Ready
You cannot migrate cryptography you cannot see.
Cryptography is not a product you own. It is infrastructure spread across certificates, protocols, code, cloud services, key stores, pipelines and devices.
Enterprise environment
Cryptography is invisible until something asks for it.
Cryptography is infrastructure.
Most organizations do not maintain a complete, continuously updated inventory of where cryptography exists or what it protects.
Run the scan to reveal cryptographic dependencies across your estate.
Answers: which certificates exist, who issued them, when do they expire. Necessary, and the foundation of certificate lifecycle management — but bounded to certificates.
Answers: which algorithms are actually negotiated, which libraries and key stores are involved, which business data depends on them, and what it would take to change them.
How cryptographic discovery works
Six observation planes converge into one cryptographic inventory.
Business context — CMDB, ownership, data classification — is layered on afterwards, so findings arrive with consequences attached rather than as raw key material.
1. Passive network observation
What cryptography is actually negotiated in production traffic.
2. Active network discovery
Probing endpoints for supported suites, versions and parameters.
3. Certificate / PKI inventory
Issued, deployed and orphaned certificates across CAs.
4. Endpoint & filesystem signals
Keystores, private keys, trust stores, embedded material.
5. Cloud / KMS / HSM APIs
Managed keys, wrapping keys, supported algorithm sets.
6. Application & dependency analysis
Crypto calls in code, libraries, pipelines, containers.
Example finding
payments-api-prod
- Asset
- payments-api-prod
- Application
- Payments platform
- Owner
- Payments Platform team
- Environment
- Production
- Protocol
- TLS 1.3
- Key establishment
- X25519
- Authentication
- ECDSA P-256
- Network exposure
- Internet exposed
- Data classification
- Payment data
- Required secrecy period
- 7 years retention
- PQ hybrid negotiation
- Not observed
- HSM ML-DSA support
- Unavailable
- Confidence
- High (passive + active corroboration)
Discovery is not a list of keys. It is a map of cryptographic dependencies and business consequences.
Prioritization
Not every RSA or ECC object is equally urgent.
Prioritization is what turns an inventory into a migration program. Drag the dimensions to see how exposure changes.
Illustrative Quantum Exposure Score
80
Illustrative and transparent — this is an educational model for this experience, not a production scoring model.
ACT NOW
Data shelf life plus estimated migration lead time overlaps the plausible threat window. This asset is urgent regardless of where the composite score lands.
Adversary mode
Quantum readiness is an adversarial contest, not a compliance project.
The attacker's capability changes over time — and so does the attack. Step through the phases.
Attacker capability
Classical
- ●Capture encrypted traffic
- ●Store indefinitely
- ●Target long-lived confidentiality
Defender response
- ●Prioritize long-lived confidentiality
- ●Deploy hybrid key establishment first
The goal is not to choose the last cryptographic algorithm your organization will ever need. The goal is to become capable of changing cryptography continuously.
PQC algorithm explorer
PQC is a portfolio, not an algorithm.
Start from the function you need to protect. Key establishment and authentication are different jobs, solved by different primitives.
What are you trying to protect?
ML-KEM
Standardized- Role
- Key establishment (KEM)
- Standard
- NIST FIPS 203
- Origin
- CRYSTALS-Kyber
- Mathematics
- Module lattice / Module-LWE
ML-KEM-768 is a strong general-purpose starting point. ML-KEM establishes shared secrets — it is not a certificate signature algorithm.
HQC
Standardization in progress- Role
- Key establishment (KEM)
- Standard
- Selected as a backup KEM; final standard expected later than ML-KEM
- Mathematics
- Code based
HQC exists partly because crypto agility requires mathematical diversity if a structural problem is ever found in lattice-based KEMs.
How a KEM actually works
- 1. Bob publishes an encapsulation key.
- 2. Alice encapsulates against it.
- 3. Alice gets ciphertext + shared secret.
- 4. Bob decapsulates the ciphertext.
- 5. Both now share a symmetric secret.
True-scale comparison
Deployment impact is measured in bytes, not opinions.
Sizes below are in bytes at real relative scale. A KEM ciphertext and a signature are different artifacts and are never compared against each other here.
ML-KEM-512
Constrained hybrid TLS
CPU: Very fast
Maturity: FIPS 203
Implementation: Moderate
ML-KEM-768
General-purpose hybrid TLS
CPU: Very fast
Maturity: FIPS 203
Implementation: Moderate
ML-KEM-1024
High-assurance key establishment
CPU: Fast
Maturity: FIPS 203
Implementation: Moderate
HQC-128 (backup KEM)
Mathematical diversity
CPU: Slower
Maturity: Standard in progress
Implementation: Higher
Hybrid TLS simulator
Transition without a flag day.
A correctly constructed hybrid exchange is designed so that the resulting session remains protected if at least one component remains secure.
X25519
Classical elliptic-curve key agreement
+
ML-KEM-768
Post-quantum key encapsulation (FIPS 203)
↓
Secure combiner
Derives the session secret
↓
TLS shared secret
Protects the session
Client key share size
The handshake grows by roughly an order of magnitude. That is where migration programs actually break.
Operational consequences to test
PQC migration is an interoperability program, not merely an algorithm-selection exercise.
Certificate evolution
What actually changes inside the certificate.
X.509 anatomy — hover a field
Field descriptions appear here.
Today's default. Both authentication and the CA's own signature rely on quantum-vulnerable mathematics.
A PQC certificate does not automatically mean the TLS key exchange is quantum resistant.
Authentication and key establishment are separate. ML-DSA in the certificate proves who you are talking to. ML-KEM in the handshake protects what you say. Harvest-now, decrypt-later is defeated by the second one, not the first.
Sectigo PQC operations
PQC becomes real when it becomes part of normal certificate operations.
A pilot proves an algorithm works. Operations prove your organization can keep changing it.
Test
Sectigo PQC Labs — try ML-DSA and hybrid chains before committing.
Issue
Private PQC in Sectigo Certificate Manager, including ML-DSA workflows.
Approve
Policy, roles and approval workflow around who can request what.
Deploy
Automated installation to endpoints, load balancers and workloads.
Discover
Certificate inventory across CAs, networks and cloud.
Monitor
Visibility into what is deployed, expiring and non-compliant.
Renew
Automation sized for shorter lifecycles, not calendar reminders.
Revoke
Fast response when a key or algorithm becomes untrustworthy.
Replace
CA-agnostic lifecycle management as algorithms and policies change.
Capability descriptions are illustrative of the Sectigo platform direction and subject to product confirmation.
Sectigo
Discover. Prioritize. Migrate. Automate. Repeat.
Discovery and posture intelligence, joined to certificate lifecycle management and PQC operations.
Provides the visibility and posture intelligence required to understand cryptographic exposure: where cryptography lives, what it protects, and what should be addressed first.
Provides the PKI, certificate experimentation, lifecycle automation and operational controls required to migrate certificate-based trust — and to keep changing it.
- 01
Discover cryptography
- 02
Inventory dependencies
- 03
Assess exposure
- 04
Add business context
- 05
Prioritize migration
- 06
Test PQC
- 07
Issue new certificates
- 08
Deploy and automate lifecycle
- 09
Observe production cryptography
- 10
Rediscover continuously
Then it repeats. The loop is the product — complementary discovery and lifecycle capabilities, not a claim of native remediation orchestration.
The crypto-agility arms race
No algorithm ends the contest.
Defender
Adversary
Crypto agility is the security capability that survives algorithm change.
Readiness assessment
How close are you to Quantum Ready?
Eight questions. The result is a maturity stage and a recommended next step toward Q-Day readiness — never a claim that anyone is permanently quantum safe.
1. Do you have a continuously maintained inventory of cryptography?
2. Can you identify RSA/ECC/DH use across certificates, applications, protocols and infrastructure?
3. Do you know which encrypted data must remain confidential for more than five years?
4. Do you know which systems support standardized PQC today?
5. Have you tested ML-KEM or ML-DSA in your environment?
6. Can your HSM/KMS infrastructure support your target PQC algorithms?
7. Can you automatically replace certificates or algorithms at scale?
8. Can you verify which cryptographic algorithms are actually negotiated in production?
Your snapshot appears here: current stage, highest priority, visibility gap, migration blocker, and a recommended 90-day action list you can take into a planning session.
Next step
Get visibility now. Become Quantum Ready before Q-Day.
Pick the level of engagement that matches where you are on the path to Q-Day readiness.
Quantum readiness is the permanent ability to discover cryptographic risk, prioritize it, migrate it, and keep changing cryptography faster than adversaries can exploit it.