# Function Call Hijacking ⎊ Area ⎊ Resource 1

---

## What is the Action of Function Call Hijacking?

Function call hijacking, within cryptocurrency derivatives and options trading, represents a malicious or unauthorized alteration of the intended execution path of a smart contract or trading algorithm. This typically involves intercepting and modifying a function call before it reaches its designated target, potentially leading to unintended consequences such as unauthorized asset transfers or order modifications. The immediate action often involves identifying the compromised function and tracing the source of the manipulation, requiring sophisticated monitoring and intrusion detection systems. Mitigation strategies frequently include enhanced input validation, secure coding practices, and the implementation of multi-signature authorization protocols to prevent unauthorized modifications.

## What is the Algorithm of Function Call Hijacking?

The core of function call hijacking exploits vulnerabilities in the underlying algorithms governing smart contract execution or trading system logic. Attackers leverage weaknesses in code design, such as insufficient input sanitization or predictable function call sequences, to inject malicious code or redirect execution flow. Advanced techniques may involve dynamic code generation or the use of metamorphic code to evade detection by standard security measures. Robust algorithmic design necessitates rigorous testing, formal verification, and the incorporation of defensive programming techniques to minimize the attack surface.

## What is the Authentication of Function Call Hijacking?

Secure authentication mechanisms are paramount in preventing function call hijacking, particularly within decentralized finance (DeFi) ecosystems and options trading platforms. Traditional authentication methods, such as passwords, are often insufficient due to their susceptibility to phishing and credential theft. Modern approaches emphasize multi-factor authentication, biometric verification, and hardware security modules (HSMs) to strengthen access control and protect against unauthorized function calls. Furthermore, decentralized identity solutions and verifiable credentials offer enhanced privacy and security, enabling users to selectively disclose information and control access to their assets.


---

## [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

## [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

## [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

## [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

## [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

## [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

## [Session Hijacking](https://term.greeks.live/definition/session-hijacking/)

The theft of an active session token to gain unauthorized access to a user account and its financial functions. ⎊ Term

## [Probability Density Function](https://term.greeks.live/definition/probability-density-function/)

A mathematical function representing the likelihood of different future asset price outcomes in a given timeframe. ⎊ Term

## [State Transition Function](https://term.greeks.live/definition/state-transition-function/)

The core logical rule set that dictates how a protocol updates its state based on new transaction data. ⎊ Term

## [Payoff Function](https://term.greeks.live/definition/payoff-function/)

A mathematical formula that determines the profit or loss of a derivative based on the underlying asset's price. ⎊ Term

## [Function-Level Authorization](https://term.greeks.live/definition/function-level-authorization/)

Enforcing access control checks within each individual function to restrict who can execute specific code. ⎊ Term

## [Function Modifiers](https://term.greeks.live/definition/function-modifiers/)

Code constructs used to modify function behavior, typically for access control and enforcing security preconditions. ⎊ Term

## [Function Visibility Risks](https://term.greeks.live/definition/function-visibility-risks/)

Improper use of visibility modifiers exposing internal or sensitive functions to unauthorized public or external access. ⎊ Term

## [Implementation Contract Hijacking](https://term.greeks.live/definition/implementation-contract-hijacking/)

Gaining unauthorized control over the logic contract used by proxies to influence protocol behavior. ⎊ Term

## [Governance Role Hijacking](https://term.greeks.live/definition/governance-role-hijacking/)

The takeover of administrative or voting roles to seize control of protocol governance and treasury assets. ⎊ Term

## [Smart Contract Pause Function](https://term.greeks.live/definition/smart-contract-pause-function/)

Built in security feature allowing developers to temporarily halt contract operations to prevent loss during an exploit. ⎊ Term

## [Central Clearinghouse Function](https://term.greeks.live/definition/central-clearinghouse-function/)

Intermediary that guarantees trade performance and mitigates counterparty risk by becoming the buyer to every seller. ⎊ Term

## [Session Hijacking Mitigation](https://term.greeks.live/definition/session-hijacking-mitigation/)

Security measures designed to prevent attackers from stealing and using active session tokens to impersonate users. ⎊ Term

## [Cryptographic Hash Function](https://term.greeks.live/definition/cryptographic-hash-function/)

A mathematical tool that converts input data into a unique fixed-length string to ensure data integrity and authenticity. ⎊ Term

## [Time-Lock Function](https://term.greeks.live/definition/time-lock-function/)

Code-enforced delay mechanism preventing function execution until a specific future block or time is reached. ⎊ Term

## [Non Linear Spread Function](https://term.greeks.live/term/non-linear-spread-function/)

Meaning ⎊ The non linear spread function quantifies the dynamic cost of liquidity, adjusting for volatility and risk to maintain decentralized market stability. ⎊ Term

## [Proxy Admin Hijacking](https://term.greeks.live/definition/proxy-admin-hijacking/)

Unauthorized takeover of proxy administrative controls enabling malicious contract upgrades and total protocol compromise. ⎊ Term

---

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            "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/"
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            "image": {
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            "@id": "https://term.greeks.live/definition/session-hijacking/",
            "url": "https://term.greeks.live/definition/session-hijacking/",
            "headline": "Session Hijacking",
            "description": "The theft of an active session token to gain unauthorized access to a user account and its financial functions. ⎊ Term",
            "datePublished": "2026-03-15T04:22:12+00:00",
            "dateModified": "2026-03-19T20:16:52+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
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                "caption": "A close-up view shows a sophisticated, dark blue central structure acting as a junction point for several white components. The design features smooth, flowing lines and integrates bright neon green and blue accents, suggesting a high-tech or advanced system."
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            "@type": "Article",
            "@id": "https://term.greeks.live/definition/probability-density-function/",
            "url": "https://term.greeks.live/definition/probability-density-function/",
            "headline": "Probability Density Function",
            "description": "A mathematical function representing the likelihood of different future asset price outcomes in a given timeframe. ⎊ Term",
            "datePublished": "2026-03-15T10:45:55+00:00",
            "dateModified": "2026-05-25T10:08:04+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
            "image": {
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                "caption": "A highly detailed rendering showcases a close-up view of a complex mechanical joint with multiple interlocking rings in dark blue, green, beige, and white. This precise assembly symbolizes the intricate architecture of advanced financial derivative instruments."
            }
        },
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            "@type": "Article",
            "@id": "https://term.greeks.live/definition/state-transition-function/",
            "url": "https://term.greeks.live/definition/state-transition-function/",
            "headline": "State Transition Function",
            "description": "The core logical rule set that dictates how a protocol updates its state based on new transaction data. ⎊ Term",
            "datePublished": "2026-03-15T12:44:22+00:00",
            "dateModified": "2026-05-30T15:43:18+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
            "image": {
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                "url": "https://term.greeks.live/wp-content/uploads/2025/12/decentralized-finance-layered-architecture-representing-risk-management-collateralization-structures-and-protocol-composability.jpg",
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                "caption": "This abstract illustration depicts multiple concentric layers and a central cylindrical structure within a dark, recessed frame. The layers transition in color from deep blue to bright green and cream, creating a sense of depth and intricate design."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/payoff-function/",
            "url": "https://term.greeks.live/definition/payoff-function/",
            "headline": "Payoff Function",
            "description": "A mathematical formula that determines the profit or loss of a derivative based on the underlying asset's price. ⎊ Term",
            "datePublished": "2026-03-16T04:18:24+00:00",
            "dateModified": "2026-03-16T04:19:01+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
            "image": {
                "@type": "ImageObject",
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                "height": 2166,
                "caption": "A close-up view shows a repeating pattern of dark circular indentations on a surface. Interlocking pieces of blue, cream, and green are embedded within and connect these circular voids, suggesting a complex, structured system."
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            "@type": "Article",
            "@id": "https://term.greeks.live/definition/function-level-authorization/",
            "url": "https://term.greeks.live/definition/function-level-authorization/",
            "headline": "Function-Level Authorization",
            "description": "Enforcing access control checks within each individual function to restrict who can execute specific code. ⎊ Term",
            "datePublished": "2026-03-16T10:45:29+00:00",
            "dateModified": "2026-03-16T10:46:59+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/interlocking-component-representation-of-layered-financial-derivative-contract-mechanisms-for-algorithmic-execution.jpg",
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                "height": 2166,
                "caption": "A highly detailed rendering showcases a close-up view of a complex mechanical joint with multiple interlocking rings in dark blue, green, beige, and white. This precise assembly symbolizes the intricate architecture of advanced financial derivative instruments."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/function-modifiers/",
            "url": "https://term.greeks.live/definition/function-modifiers/",
            "headline": "Function Modifiers",
            "description": "Code constructs used to modify function behavior, typically for access control and enforcing security preconditions. ⎊ Term",
            "datePublished": "2026-03-16T10:50:07+00:00",
            "dateModified": "2026-05-28T20:59:44+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
            "image": {
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                "width": 3850,
                "height": 2166,
                "caption": "This abstract image displays a complex layered object composed of interlocking segments in varying shades of blue, green, and cream. The close-up perspective highlights the intricate mechanical structure and overlapping forms."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/function-visibility-risks/",
            "url": "https://term.greeks.live/definition/function-visibility-risks/",
            "headline": "Function Visibility Risks",
            "description": "Improper use of visibility modifiers exposing internal or sensitive functions to unauthorized public or external access. ⎊ Term",
            "datePublished": "2026-03-17T04:17:41+00:00",
            "dateModified": "2026-03-17T04:19:14+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-exchange-automated-market-maker-connecting-cross-chain-liquidity-pools-for-derivative-settlement.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A high-tech abstract visualization shows two dark, cylindrical pathways intersecting at a complex central mechanism. 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/definition/implementation-contract-hijacking/",
            "url": "https://term.greeks.live/definition/implementation-contract-hijacking/",
            "headline": "Implementation Contract Hijacking",
            "description": "Gaining unauthorized control over the logic contract used by proxies to influence protocol behavior. ⎊ Term",
            "datePublished": "2026-03-17T04:21:18+00:00",
            "dateModified": "2026-03-31T13:03:11+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/layered-risk-hedging-strategies-and-collateralization-mechanisms-in-decentralized-finance-derivative-markets.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A stylized, close-up view of a high-tech mechanism or claw structure featuring layered components in dark blue, teal green, and cream colors. The design emphasizes sleek lines and sharp points, suggesting precision and force."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/governance-role-hijacking/",
            "url": "https://term.greeks.live/definition/governance-role-hijacking/",
            "headline": "Governance Role Hijacking",
            "description": "The takeover of administrative or voting roles to seize control of protocol governance and treasury assets. ⎊ Term",
            "datePublished": "2026-03-17T04:23:41+00:00",
            "dateModified": "2026-03-17T04:25:07+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/algorithmic-collateral-management-architecture-for-decentralized-finance-synthetic-assets-and-options-payoff-structures.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A high-precision mechanical component features a dark blue housing encasing a vibrant green coiled element, with a light beige exterior part. The intricate design symbolizes the inner workings of a decentralized finance DeFi protocol."
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        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/smart-contract-pause-function/",
            "url": "https://term.greeks.live/definition/smart-contract-pause-function/",
            "headline": "Smart Contract Pause Function",
            "description": "Built in security feature allowing developers to temporarily halt contract operations to prevent loss during an exploit. ⎊ Term",
            "datePublished": "2026-03-17T06:45:34+00:00",
            "dateModified": "2026-03-17T06:46:04+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/modular-smart-contract-coupling-and-cross-asset-correlation-in-decentralized-derivatives-settlement.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "The image displays a close-up view of two dark, sleek, cylindrical mechanical components with a central connection point. The internal mechanism features a bright, glowing green ring, indicating a precise and active interface between the segments."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/central-clearinghouse-function/",
            "url": "https://term.greeks.live/definition/central-clearinghouse-function/",
            "headline": "Central Clearinghouse Function",
            "description": "Intermediary that guarantees trade performance and mitigates counterparty risk by becoming the buyer to every seller. ⎊ Term",
            "datePublished": "2026-03-17T06:47:51+00:00",
            "dateModified": "2026-03-17T06:48:42+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/multilayered-collateralization-protocol-interlocking-mechanism-for-smart-contracts-in-decentralized-derivatives-valuation.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A close-up view shows a precision mechanical coupling composed of multiple concentric rings and a central shaft. A dark blue inner shaft passes through a bright green ring, which interlocks with a pale yellow outer ring, connecting to a larger silver component with slotted features."
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        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/session-hijacking-mitigation/",
            "url": "https://term.greeks.live/definition/session-hijacking-mitigation/",
            "headline": "Session Hijacking Mitigation",
            "description": "Security measures designed to prevent attackers from stealing and using active session tokens to impersonate users. ⎊ Term",
            "datePublished": "2026-03-17T08:33:52+00:00",
            "dateModified": "2026-03-17T08:35:48+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-options-structuring-complex-collateral-layers-and-senior-tranches-risk-mitigation-protocol.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A macro view displays two nested cylindrical structures composed of multiple rings and central hubs in shades of dark blue, light blue, deep green, light green, and cream. The components are arranged concentrically, highlighting the intricate layering of the mechanical-like parts."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/cryptographic-hash-function/",
            "url": "https://term.greeks.live/definition/cryptographic-hash-function/",
            "headline": "Cryptographic Hash Function",
            "description": "A mathematical tool that converts input data into a unique fixed-length string to ensure data integrity and authenticity. ⎊ Term",
            "datePublished": "2026-03-17T21:50:31+00:00",
            "dateModified": "2026-04-26T15:10:49+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/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/time-lock-function/",
            "url": "https://term.greeks.live/definition/time-lock-function/",
            "headline": "Time-Lock Function",
            "description": "Code-enforced delay mechanism preventing function execution until a specific future block or time is reached. ⎊ Term",
            "datePublished": "2026-03-18T11:03:40+00:00",
            "dateModified": "2026-03-18T11:04:32+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-trading-protocol-interface-for-complex-structured-financial-derivatives-execution-and-yield-generation.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "A futuristic and highly stylized object with sharp geometric angles and a multi-layered design, featuring dark blue and cream components integrated with a prominent teal and glowing green mechanism. The composition suggests advanced technological function and data processing."
            }
        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/term/non-linear-spread-function/",
            "url": "https://term.greeks.live/term/non-linear-spread-function/",
            "headline": "Non Linear Spread Function",
            "description": "Meaning ⎊ The non linear spread function quantifies the dynamic cost of liquidity, adjusting for volatility and risk to maintain decentralized market stability. ⎊ Term",
            "datePublished": "2026-03-18T18:31:25+00:00",
            "dateModified": "2026-03-18T18:32:28+00:00",
            "author": {
                "@type": "Person",
                "name": "Greeks.live",
                "url": "https://term.greeks.live/author/greeks-live/"
            },
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                "@type": "ImageObject",
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                "width": 3850,
                "height": 2166,
                "caption": "A stylized, colorful padlock featuring blue, green, and cream sections has a key inserted into its central keyhole. The key is positioned vertically, suggesting the act of unlocking or validating access within a secure system."
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        },
        {
            "@type": "Article",
            "@id": "https://term.greeks.live/definition/proxy-admin-hijacking/",
            "url": "https://term.greeks.live/definition/proxy-admin-hijacking/",
            "headline": "Proxy Admin Hijacking",
            "description": "Unauthorized takeover of proxy administrative controls enabling malicious contract upgrades and total protocol compromise. ⎊ Term",
            "datePublished": "2026-03-19T04:54:29+00:00",
            "dateModified": "2026-03-19T04:55:39+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-exchange-automated-market-maker-mechanism-price-discovery-and-volatility-hedging-collateralization.jpg",
                "width": 3850,
                "height": 2166,
                "caption": "The image shows a close-up, macro view of an abstract, futuristic mechanism with smooth, curved surfaces. The components include a central blue piece and rotating green elements, all enclosed within a dark navy-blue frame, suggesting fluid movement."
            }
        }
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    "image": {
        "@type": "ImageObject",
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    }
}
```


---

**Original URL:** https://term.greeks.live/area/function-call-hijacking/resource/1/
