Understanding Vulnerabilities of Unordered Map
Unordered map is presumed to have O(1) time complexity per operation, assuming minimal collisions. The assumption is valid for random input data but becomes precarious with non-random or adversarial inputs during hacking attempts. If the hash function is known, attackers can craft inputs causing O(n^2) collisions, compromising the expected constant-time complexity of unordered map operations.
Optimization for Unordered Map O(1) operations
C++ provides convenient data structures like std::set and std::map, tree-based structures with operations taking O(log n) time. With C++11, hash-based alternatives were introduced: std::unordered_set and std::unordered_map. However, concerns arise regarding potential vulnerabilities and efficiency in real-world scenarios. In this article, we’re going to explore strategies to optimize unordered maps for O(1) operations and address security issues.
Table of Content
- Implementation of Unordered Map
- Understanding Vulnerabilities of Unordered Map
- Vulnerable Implementation for Unordered Map
- Secure Unordered Map from Collision Attacks
- Better Implementation of Unordered Map
Contact Us