SCA優化
Cardflo的SCA優化可幫助商戶有效應對嚴格客戶身份驗證要求。 我們確保符合PSD2和其他法規，同時最大限度地減少對轉換率的影響。
我們的平台智能管理身份驗證流程，在可能的情況下促進無摩擦體驗並有效保護交易。
- 類別
- 安全
- 功能數
- 10
- 適用於
- 所有方案
概覽
Strong Customer Authentication (SCA) optimisation refers to the technical management of two-factor authentication requirements mandated under PSD2 in the European Economic Area and the United Kingdom.
This process sits between the merchant checkout and the issuer authorisation request, determining when a transaction requires a full 3DS challenge versus when an exemption can be applied.
By analysing transaction data such as the merchant category code (MCC), transaction value, and historical cardholder behaviour, an optimisation engine selects the appropriate SCA path. The goal is to satisfy the regulatory requirements of the issuer while maintaining the lowest possible friction for the payer.
Effective SCA management involves the use of Transaction Risk Analysis (TRA) and other specific exemptions to bypass redundant security steps.
This reduces the likelihood of cart abandonment caused by complex authentication procedures, ensuring that the necessary security protocols do not negatively impact the authorisation rates within the payments ecosystem.
運作方式
Transaction data analysis
The system evaluates every inbound transaction for specific data points including the merchant category code, transaction amount, and geographic location.
This initial assessment determines if the transaction falls within the scope of PSD2 mandates or if it qualifies as an out-of-scope transaction, such as mail order or telephone orders.
Exemption engine application
The engine applies logic to identify eligible exemptions like low-value payments under thirty euros or recurring transactions.
If the acquirer supports Transaction Risk Analysis, the platform assesses the real-time risk level to request a friction-free flow, notifying the issuer that the transaction meets the threshold for an exemption.
Protocol version selection
The gateway determines the highest supported version of 3-D Secure, preferring EMV 3DS (3DS2) over older protocols.
This ensures compatibility with modern mobile banking apps and biometric authentication methods, which provide a significantly better user experience than legacy systems that rely on static passwords or SMS codes.
Dynamic challenge handling
If an issuer rejects an exemption request and returns a soft decline, the system triggers a platform-level retry with a full authentication challenge.
This automated step prevents a permanent hard decline, allowing the consumer to complete the two-factor authentication process and facilitating a successful subsequent authorisation.
為何重要
Authorisation rate preservation
Unoptimised SCA implementations frequently lead to higher decline rates because issuers may reject transactions that lack the necessary flags or authentication data. By correctly categorising transactions and applying the appropriate SCA tags, merchants maintain standing with issuers.
This technical precision reduces the risk of soft declines and ensures that legitimate transactions are not blocked by overly aggressive fraud filters or rigid regulatory interpretations by the issuing bank.
Conversion and friction reduction
The primary cause of abandonment during the payment phase is the introduction of additional steps. SCA optimisation focuses on maximising the use of frictionless flows, where the cardholder is not prompted for manual input.
By strategically using Transaction Risk Analysis (TRA) and low-value exemptions, businesses can process a significant portion of their volume without a challenge, directly improving the bottom line through reduced churn at the point of sale.
應用案例
Subscription based businesses
Merchant-initiated transactions (MITs) for recurring billing require specific SCA flags. Optimisation ensures the first transaction is authenticated correctly, while subsequent payments are marked as exempt, preventing recurring revenue loss from authentication failures.
High volume low value retail
Retailers with frequent transactions under thirty euros use SCA optimisation to skip 3DS challenges for the majority of orders, maintaining a fast checkout experience similar to one-click ordering systems common in established marketplaces.
Travel and hospitality
For hotel bookings where a card is stored for later charges, SCA optimisation ensures that the initial validation includes the correct permissions for subsequent off-session charges, reducing issues during the check-out or no-show billing processes.
Cross-border e-commerce
When selling into the European market from outside, specific SCA rules apply. Optimisation logic identifies the regional requirements of the issuer and applies the necessary 3DS protocols to ensure compliance and successful cross-border settlement.
數據概覽
This represents the typical percentage of transactions that can bypass manual authentication prompts through strategic exemption management within the European market.
Merchants often observe this range of improvement in successful authorisations when moving from basic 3DS implementation to an optimised SCA strategy.
The additional technical overhead for evaluating exemptions and selecting the optimal 3DS version is generally minimal and does not impact page load times.
相關術語
Talk to our team about a live rollout on your acquiring stack.
What you get with SCA優化
- 智能管理SCA豁免和挑戰。
- 遵守PSD2和其他區域SCA法規。
- 優化SCA流程以減少客戶摩擦。
- 根據交易風險和價值動態應用SCA。
- 透過戰略性SCA實施提高批准率。
- SCA性能和豁免率的詳細分析。
- Technical support for low-value payment exemptions to minimise friction for small ticket transactions.
- Integration with network tokens to improve the security profile of stored credential transactions.
- Logging of all SCA interaction data for audit trailing and regulatory reporting requirements.
- Optimisation of 3DS data packets to include additional context for improved issuer risk scoring.
A short scoping call, then a written plan for your MIDs.
Questions about SCA優化
什麼是SCA優化？
SCA優化涉及戰略性地應用嚴格客戶身份驗證以符合PSD2等法規，同時旨在最大限度地減少客戶摩擦。 它使用豁免和動態挑戰平衡安全性和轉換。
SCA優化如何使商戶受益？
商戶受益於提高符合監管要求、降低詐騙率以及通過避免不必要的身份驗證步驟來提高轉換率。 它有助於維持平穩的客戶旅程，同時確保支付安全。
SCA優化只適用於歐洲交易嗎？
雖然嚴格客戶身份驗證主要由歐洲的PSD2推動，但其原則正在全球範圍內採用。 Cardflo的SCA優化有助於商戶遵守這些不斷變化的要求，無論其運營區域如何。
Are recurring payments and subscriptions exempt from SCA?
Only the initial transaction in a subscription series, which is a cardholder-initiated transaction (CIT), requires SCA.
Subsequent payments are classified as merchant-initiated transactions (MIT) and are technically out of scope for SCA, provided the first transaction was correctly authenticated and the subsequent ones contain the appropriate original transaction ID references.
Optimisation ensures these links are maintained across the payment lifecycle so that renewal payments are not declined for lack of authentication.
How does the low-value payment exemption work in practice?
The low-value payment (LVP) exemption applies to transactions under thirty euros. However, the regulation includes counters; once a cardholder reaches five consecutive exempt transactions or a total spend of one hundred euros, the issuer must challenge the next payment.
An optimisation layer manages these requests but must be prepared for the issuer to refuse the LVP exemption once these thresholds are met, requiring a seamless transition to a full 3DS flow.
Does SCA optimisation affect PCI DSS compliance requirements?
SCA optimisation is a layer that interacts with 3-D Secure protocols and does not directly change the merchant's PCI DSS scope, provided the merchant continues to use a secure gateway or vaulting system.
By handling the 3DS payloads and exemption flags, the optimisation engine operates within the existing secure environment, ensuring that sensitive cardholder data remains protected while the metadata related to authentication and exemptions is managed.