# Secure External Function Calls ⎊ Area ⎊ Resource 1 --- ## What is the Context of Secure External Function Calls? Secure External Function Calls (SEFCs) represent a critical architectural pattern gaining prominence within cryptocurrency, options trading, and financial derivatives, particularly as on-chain environments increasingly interact with off-chain data and computations. These calls enable smart contracts to access external resources, such as oracles for price feeds or specialized computation services, expanding their functionality beyond the limitations of the blockchain itself. The secure execution of these external interactions is paramount to maintaining the integrity and reliability of decentralized applications, demanding robust mechanisms to prevent manipulation and ensure data provenance. Consequently, SEFCs are a focal point for both developers and regulators seeking to balance innovation with risk mitigation in the evolving digital asset landscape. ## What is the Algorithm of Secure External Function Calls? The algorithmic underpinning of SEFCs typically involves a combination of cryptographic techniques and verifiable computation protocols. Zero-knowledge proofs, for instance, allow a smart contract to verify the correctness of an off-chain computation without revealing the underlying data, enhancing privacy and security. Furthermore, techniques like threshold signatures can distribute the control of SEFC execution across multiple parties, reducing the risk of single points of failure and collusion. Designing efficient and secure algorithms for SEFCs requires careful consideration of computational costs, latency constraints, and the potential for adversarial attacks, necessitating a deep understanding of both blockchain technology and cryptographic principles. ## What is the Risk of Secure External Function Calls? The primary risk associated with SEFCs stems from the potential for oracle manipulation or vulnerabilities in the external computation services. Malicious actors could exploit these weaknesses to inject false data or execute arbitrary code, leading to financial losses or systemic instability. Mitigating this risk requires rigorous auditing of external providers, implementation of robust data validation mechanisms, and the use of decentralized oracle networks to enhance data reliability. Furthermore, formal verification techniques can be employed to mathematically prove the correctness of SEFC algorithms, providing a higher degree of assurance against vulnerabilities. --- ## [Covered Calls](https://term.greeks.live/term/covered-calls/) Meaning ⎊ A covered call strategy generates yield by selling call options against an owned underlying asset, capping potential upside gains in exchange for immediate premium income. ⎊ Term ## [Margin Calls](https://term.greeks.live/definition/margin-calls/) A requirement to add more collateral to a leveraged position when its value drops near the maintenance threshold. ⎊ Term ## [Secure Multi-Party Computation](https://term.greeks.live/definition/secure-multi-party-computation/) A method for multiple parties to jointly compute a function while keeping their individual inputs secret. ⎊ Term ## [Slippage Cost Function](https://term.greeks.live/term/slippage-cost-function/) Meaning ⎊ The Slippage Cost Function quantifies execution cost divergence in crypto options, serving as a critical variable in decentralized market microstructure analysis and risk management. ⎊ Term ## [Non-Linear Cost Function](https://term.greeks.live/term/non-linear-cost-function/) Meaning ⎊ Non-linear cost functions in crypto options primarily refer to slippage, where trade size non-linearly impacts execution price due to AMM invariant curves. ⎊ Term ## [Non-Linear Payoff Function](https://term.greeks.live/term/non-linear-payoff-function/) Meaning ⎊ The Volatility Skew is the non-linear function describing the relationship between an option's strike price and its implied volatility, acting as the market's dynamic pricing of tail risk and systemic leverage. ⎊ Term ## [Non-Linear Fee Function](https://term.greeks.live/term/non-linear-fee-function/) Meaning ⎊ The Asymptotic Liquidity Toll functions as a non-linear risk management mechanism that penalizes excessive liquidity consumption to protect protocol solvency. ⎊ Term ## [Transaction Cost Function](https://term.greeks.live/term/transaction-cost-function/) Meaning ⎊ The Liquidity Fragmentation Delta quantifies the total execution cost of a crypto options trade by modeling the explicit protocol fees, implicit market impact, and adversarial MEV tax across fragmented liquidity venues. ⎊ Term ## [Non-Linear Slippage Function](https://term.greeks.live/term/non-linear-slippage-function/) Meaning ⎊ The Non-Linear Slippage Function defines the exponential cost scaling inherent in decentralized liquidity pools, governing the physics of execution. ⎊ Term ## [Zero-Knowledge Margin Calls](https://term.greeks.live/term/zero-knowledge-margin-calls/) Meaning ⎊ Zero-Knowledge Margin Calls are cryptographic primitives that enable provably solvent, capital-efficient, and privacy-preserving derivatives trading by verifying collateral health without revealing portfolio specifics. ⎊ Term ## [Capital Efficiency Function](https://term.greeks.live/term/capital-efficiency-function/) Meaning ⎊ The Cross-Margining Liquidity Aggregator optimizes capital utility by mathematically offsetting risk vectors across a unified portfolio architecture. ⎊ Term ## [External Drivers](https://term.greeks.live/definition/external-drivers/) Exogenous variables impacting market dynamics, pricing, and liquidity outside the direct control of a specific protocol. ⎊ Term ## [Automated Margin Calls](https://term.greeks.live/term/automated-margin-calls/) Meaning ⎊ Automated margin calls provide the deterministic, code-based enforcement of solvency necessary for the stability of decentralized derivative markets. ⎊ Term ## [External State Verification](https://term.greeks.live/term/external-state-verification/) Meaning ⎊ External State Verification provides the cryptographically secure mechanism for decentralized protocols to ingest and validate real-world data. ⎊ Term ## [Piecewise Non Linear Function](https://term.greeks.live/term/piecewise-non-linear-function/) Meaning ⎊ Piecewise non linear functions enable decentralized protocols to dynamically calibrate liquidity and risk exposure based on changing market states. ⎊ Term ## [Non-Linear Solvency Function](https://term.greeks.live/term/non-linear-solvency-function/) Meaning ⎊ The non-linear solvency function calculates real-time liquidation thresholds by accounting for asset volatility and liquidity-driven execution slippage. ⎊ Term ## [Secure Computation](https://term.greeks.live/definition/secure-computation/) Privacy-preserving joint data processing without revealing individual inputs to any participating party. ⎊ Term ## [Payoff Function Verification](https://term.greeks.live/term/payoff-function-verification/) Meaning ⎊ Payoff Function Verification provides the mathematical certainty required to ensure derivative contracts execute accurately within decentralized markets. ⎊ Term ## [External Call Vulnerability](https://term.greeks.live/definition/external-call-vulnerability/) Risks associated with interacting with untrusted code that can trigger malicious callbacks during execution. ⎊ Term ## [Hash Function](https://term.greeks.live/definition/hash-function/) An algorithm that maps data to a unique, fixed-length string, ensuring data integrity. ⎊ Term ## [One-Way Function](https://term.greeks.live/definition/one-way-function/) A mathematical operation that is simple to calculate forward but practically impossible to reverse to find the input. ⎊ Term ## [Secure Data Storage](https://term.greeks.live/term/secure-data-storage/) Meaning ⎊ Secure Data Storage provides the cryptographic foundation for decentralized derivatives, ensuring immutable, verifiable, and secure financial state. ⎊ Term ## [Secure Data Aggregation](https://term.greeks.live/term/secure-data-aggregation/) Meaning ⎊ Secure Data Aggregation provides the cryptographically verified foundation for accurate pricing and risk management in decentralized derivative markets. ⎊ Term ## [Autocorrelation Function](https://term.greeks.live/definition/autocorrelation-function/) Statistical measure of the relationship between a time series and its past values, identifying trends and cyclicality. ⎊ Term ## [Fallback Function](https://term.greeks.live/definition/fallback-function/) A special contract function triggered by unmatched calls or direct payments, often used as an exploit vector. ⎊ Term ## [External Call Risk](https://term.greeks.live/definition/external-call-risk/) The security risks posed by interacting with untrusted or malicious contracts during execution. ⎊ Term ## [Secure Execution Environments](https://term.greeks.live/definition/secure-execution-environments/) Isolated processor environments that protect sensitive data and code from unauthorized access during execution. ⎊ Term ## [Secure Boot](https://term.greeks.live/definition/secure-boot/) A security process ensuring a device only executes trusted, verified software during the startup sequence. ⎊ Term ## [Secure Data Transmission](https://term.greeks.live/term/secure-data-transmission/) Meaning ⎊ Secure Data Transmission provides the cryptographic foundation for private, tamper-proof execution within global decentralized derivative markets. ⎊ Term ## [Secure Communication Protocols](https://term.greeks.live/term/secure-communication-protocols/) Meaning ⎊ Secure Communication Protocols provide the essential cryptographic armor required to protect trade data and liquidity from adversarial market agents. ⎊ Term --- ## Raw Schema Data ```json { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://term.greeks.live/" }, { "@type": "ListItem", "position": 2, "name": "Area", "item": "https://term.greeks.live/area/" }, { "@type": "ListItem", "position": 3, "name": "Secure External Function Calls", "item": "https://term.greeks.live/area/secure-external-function-calls/" }, { "@type": "ListItem", "position": 4, "name": "Resource 1", "item": "https://term.greeks.live/area/secure-external-function-calls/resource/1/" } ] } ``` ```json { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is the Context of Secure External Function Calls?", "acceptedAnswer": { "@type": "Answer", "text": "Secure External Function Calls (SEFCs) represent a critical architectural pattern gaining prominence within cryptocurrency, options trading, and financial derivatives, particularly as on-chain environments increasingly interact with off-chain data and computations. 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The interior of the pathways and the mechanism's core glow with a vibrant green light, highlighting the connection point." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/non-linear-solvency-function/", "url": "https://term.greeks.live/term/non-linear-solvency-function/", "headline": "Non-Linear Solvency Function", "description": "Meaning ⎊ The non-linear solvency function calculates real-time liquidation thresholds by accounting for asset volatility and liquidity-driven execution slippage. ⎊ Term", "datePublished": "2026-03-12T15:00:51+00:00", "dateModified": "2026-03-12T15:01:15+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/non-linear-payoff-structure-of-derivative-contracts-and-dynamic-risk-mitigation-strategies-in-volatile-markets.jpg", "width": 3850, "height": 2166, "caption": "A high-resolution technical rendering displays a flexible joint connecting two rigid dark blue cylindrical components. The central connector features a light-colored, concave element enclosing a complex, articulated metallic mechanism." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/secure-computation/", "url": "https://term.greeks.live/definition/secure-computation/", "headline": "Secure Computation", "description": "Privacy-preserving joint data processing without revealing individual inputs to any participating party. ⎊ Term", "datePublished": "2026-03-12T19:38:04+00:00", "dateModified": "2026-05-22T12:42:25+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/cryptographic-consensus-mechanism-validation-protocol-demonstrating-secure-peer-to-peer-interoperability-in-cross-chain-environment.jpg", "width": 3850, "height": 2166, "caption": "A detailed rendering shows a high-tech cylindrical component being inserted into another component's socket. The connection point reveals inner layers of a white and blue housing surrounding a core emitting a vivid green light." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/payoff-function-verification/", "url": "https://term.greeks.live/term/payoff-function-verification/", "headline": "Payoff Function Verification", "description": "Meaning ⎊ Payoff Function Verification provides the mathematical certainty required to ensure derivative contracts execute accurately within decentralized markets. ⎊ Term", "datePublished": "2026-03-13T02:11:20+00:00", "dateModified": "2026-03-13T02:12:07+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/complex-structured-note-design-incorporating-automated-risk-mitigation-and-dynamic-payoff-structures.jpg", "width": 3850, "height": 2166, "caption": "A stylized, high-tech object with a sleek design is shown against a dark blue background. The core element is a teal-green component extending from a layered base, culminating in a bright green glowing lens." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/external-call-vulnerability/", "url": "https://term.greeks.live/definition/external-call-vulnerability/", "headline": "External Call Vulnerability", "description": "Risks associated with interacting with untrusted code that can trigger malicious callbacks during execution. ⎊ Term", "datePublished": "2026-03-13T03:41:41+00:00", "dateModified": "2026-04-21T00:06:48+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/decentralized-finance-protocol-smart-contract-execution-status-indicator-and-algorithmic-trading-mechanism-health.jpg", "width": 3850, "height": 2166, "caption": "A close-up shot captures a light gray, circular mechanism with segmented, neon green glowing lights, set within a larger, dark blue, high-tech housing. The smooth, contoured surfaces emphasize advanced industrial design and technological precision." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/hash-function/", "url": "https://term.greeks.live/definition/hash-function/", "headline": "Hash Function", "description": "An algorithm that maps data to a unique, fixed-length string, ensuring data integrity. ⎊ Term", "datePublished": "2026-03-13T04:20:01+00:00", "dateModified": "2026-04-25T11:11:48+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/algorithmic-execution-monitoring-for-a-synthetic-option-derivative-in-dark-pool-environments.jpg", "width": 3850, "height": 2166, "caption": "A smooth, dark, pod-like object features a luminous green oval on its side. The object rests on a dark surface, casting a subtle shadow, and appears to be made of a textured, almost speckled material." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/one-way-function/", "url": "https://term.greeks.live/definition/one-way-function/", "headline": "One-Way Function", "description": "A mathematical operation that is simple to calculate forward but practically impossible to reverse to find the input. ⎊ Term", "datePublished": "2026-03-13T04:20:03+00:00", "dateModified": "2026-04-06T12:56:38+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/decentralized-finance-options-contract-framework-depicting-collateralized-debt-positions-and-market-volatility.jpg", "width": 3850, "height": 2166, "caption": "The image displays a 3D rendering of a modular, geometric object resembling a robotic or vehicle component. The object consists of two connected segments, one light beige and one dark blue, featuring open-cage designs and wheels on both ends." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/secure-data-storage/", "url": "https://term.greeks.live/term/secure-data-storage/", "headline": "Secure Data Storage", "description": "Meaning ⎊ Secure Data Storage provides the cryptographic foundation for decentralized derivatives, ensuring immutable, verifiable, and secure financial state. ⎊ Term", "datePublished": "2026-03-13T07:34:55+00:00", "dateModified": "2026-03-13T07:35:49+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/secure-smart-contract-integration-for-decentralized-derivatives-collateralization-and-liquidity-management-protocols.jpg", "width": 3850, "height": 2166, "caption": "A close-up view captures the secure junction point of a high-tech apparatus, featuring a central blue cylinder marked with a precise grid pattern, enclosed by a robust dark blue casing and a contrasting beige ring. The background features a vibrant green line suggesting dynamic energy flow or data transmission within the system." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/secure-data-aggregation/", "url": "https://term.greeks.live/term/secure-data-aggregation/", "headline": "Secure Data Aggregation", "description": "Meaning ⎊ Secure Data Aggregation provides the cryptographically verified foundation for accurate pricing and risk management in decentralized derivative markets. ⎊ Term", "datePublished": "2026-03-14T07:40:06+00:00", "dateModified": "2026-03-14T07:41:16+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/cryptographic-consensus-mechanism-validation-protocol-demonstrating-secure-peer-to-peer-interoperability-in-cross-chain-environment.jpg", "width": 3850, "height": 2166, "caption": "A detailed rendering shows a high-tech cylindrical component being inserted into another component's socket. The connection point reveals inner layers of a white and blue housing surrounding a core emitting a vivid green light." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/autocorrelation-function/", "url": "https://term.greeks.live/definition/autocorrelation-function/", "headline": "Autocorrelation Function", "description": "Statistical measure of the relationship between a time series and its past values, identifying trends and cyclicality. ⎊ Term", "datePublished": "2026-03-14T16:46:46+00:00", "dateModified": "2026-03-14T16:47:25+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/algorithmic-execution-monitoring-for-a-synthetic-option-derivative-in-dark-pool-environments.jpg", "width": 3850, "height": 2166, "caption": "A smooth, dark, pod-like object features a luminous green oval on its side. The object rests on a dark surface, casting a subtle shadow, and appears to be made of a textured, almost speckled material." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/fallback-function/", "url": "https://term.greeks.live/definition/fallback-function/", "headline": "Fallback Function", "description": "A special contract function triggered by unmatched calls or direct payments, often used as an exploit vector. ⎊ Term", "datePublished": "2026-03-14T23:08:16+00:00", "dateModified": "2026-04-08T10:26:15+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/a-layered-model-illustrating-decentralized-finance-structured-products-and-yield-generation-mechanisms.jpg", "width": 3850, "height": 2166, "caption": "A detailed abstract visualization shows concentric, flowing layers in varying shades of blue, teal, and cream, converging towards a central point. Emerging from this vortex-like structure is a bright green propeller, acting as a focal point." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/external-call-risk/", "url": "https://term.greeks.live/definition/external-call-risk/", "headline": "External Call Risk", "description": "The security risks posed by interacting with untrusted or malicious contracts during execution. ⎊ Term", "datePublished": "2026-03-14T23:26:10+00:00", "dateModified": "2026-03-14T23:26:41+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/blockchain-layer-two-perpetual-swap-collateralization-architecture-and-dynamic-risk-assessment-protocol.jpg", "width": 3850, "height": 2166, "caption": "A sleek, abstract cutaway view showcases the complex internal components of a high-tech mechanism. The design features dark external layers, light cream-colored support structures, and vibrant green and blue glowing rings within a central core, suggesting advanced engineering." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/secure-execution-environments/", "url": "https://term.greeks.live/definition/secure-execution-environments/", "headline": "Secure Execution Environments", "description": "Isolated processor environments that protect sensitive data and code from unauthorized access during execution. ⎊ Term", "datePublished": "2026-03-15T03:44:49+00:00", "dateModified": "2026-04-13T06:51:09+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/optimized-algorithmic-execution-protocol-design-for-cross-chain-liquidity-aggregation-and-risk-mitigation.jpg", "width": 3850, "height": 2166, "caption": "A dark blue, streamlined object with a bright green band and a light blue flowing line rests on a complementary dark surface. The object's design represents a sophisticated financial engineering tool, specifically a proprietary quantitative strategy for derivative instruments." } }, { "@type": "Article", "@id": "https://term.greeks.live/definition/secure-boot/", "url": "https://term.greeks.live/definition/secure-boot/", "headline": "Secure Boot", "description": "A security process ensuring a device only executes trusted, verified software during the startup sequence. ⎊ Term", "datePublished": "2026-03-15T04:33:39+00:00", "dateModified": "2026-03-15T05:47:31+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/decentralized-protocol-integration-mechanism-visualized-staking-collateralization-and-cross-chain-interoperability.jpg", "width": 3850, "height": 2166, "caption": "The detailed cutaway view displays a complex mechanical joint with a dark blue housing, a threaded internal component, and a green circular feature. This structure visually metaphorizes the intricate internal operations of a decentralized finance DeFi protocol." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/secure-data-transmission/", "url": "https://term.greeks.live/term/secure-data-transmission/", "headline": "Secure Data Transmission", "description": "Meaning ⎊ Secure Data Transmission provides the cryptographic foundation for private, tamper-proof execution within global decentralized derivative markets. ⎊ Term", "datePublished": "2026-03-15T05:00:49+00:00", "dateModified": "2026-03-15T05:02:11+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/decentralized-finance-protocol-mechanics-illustrating-automated-market-maker-liquidity-and-perpetual-funding-rate-calculation.jpg", "width": 3850, "height": 2166, "caption": "A close-up view presents an abstract mechanical device featuring interconnected circular components in deep blue and dark gray tones. A vivid green light traces a path along the central component and an outer ring, suggesting active operation or data transmission within the system." } }, { "@type": "Article", "@id": "https://term.greeks.live/term/secure-communication-protocols/", "url": "https://term.greeks.live/term/secure-communication-protocols/", "headline": "Secure Communication Protocols", "description": "Meaning ⎊ Secure Communication Protocols provide the essential cryptographic armor required to protect trade data and liquidity from adversarial market agents. ⎊ Term", "datePublished": "2026-03-15T05:05:34+00:00", "dateModified": "2026-03-15T05:06:45+00:00", "author": { "@type": "Person", "name": "Greeks.live", "url": "https://term.greeks.live/author/greeks-live/" }, "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/algorithmic-interoperability-and-dynamic-risk-management-in-decentralized-finance-derivatives-protocols.jpg", "width": 3850, "height": 2166, "caption": "A macro view details a sophisticated mechanical linkage, featuring dark-toned components and a glowing green element. The intricate design symbolizes the core architecture of decentralized finance DeFi protocols, specifically focusing on options trading and financial derivatives." } } ], "image": { "@type": "ImageObject", "url": "https://term.greeks.live/wp-content/uploads/2025/12/dynamic-visualization-of-decentralized-finance-liquidity-flow-and-risk-mitigation-in-complex-options-derivatives.jpg" } } ``` --- **Original URL:** https://term.greeks.live/area/secure-external-function-calls/resource/1/