Impersonation Attacks (Global)
High-quality technical overview of Impersonation Attacks in the context of blockchain security.
Categories: 1. Primitive (Int, Float, Char). 2. Non-Primitive: Linear (Array, Stack, Queue, Linked List) and Non-Linear (Tree, Graph, [Hash Table](/ja/terms/hash-table)). Operation Types: Searching, Sorting, Insertion, Deletion, Traversal.
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🧒 5歳でもわかるように説明
Imagine you have 100 pairs of socks. You could throw them all in a big pile (that's an unorganized list), but it will take forever to find a matching pair. Instead, you could use a sock organizer with 100 small slots (that's an [Array](/ja/terms/array)). Or, you could tie matching socks together and put them in a line (that's a [Linked List](/ja/terms/linked-list)). A [data structure](/ja/terms/data-structure) is just the 'Way' you decide to store your socks so you can find them fast when you're in a hurry.
🤓 Expert Deep Dive
Technically, data structures are analyzed through their 'Asymptotic Complexity' (Big O notation). For example, an 'Array' offers O(1) access to an index but O(n) for inserting a new element in the middle because all other items must be shifted. In contrast, a 'Linked List' offers O(1) insertion but O(n) for searching because you must traverse every node from the start. More advanced structures like 'Binary Search Trees' (BST) attempt to stay balanced (AVL or Red-Black trees) to guarantee O(log n) for all operations. For modern high-concurrency systems, 'Lock-Free Data Structures' are critical; they use atomic CPU operations to allow multiple threads to update the same structure without causing 'Race Conditions' or requiring expensive locks.