Information-theoretically secure algorithms

Information-theoretically secure algorithms refer to cryptographic methods that provide security guarantees based on information theory rather than computational assumptions. This means that the security of these algorithms does not rely on the difficulty of certain mathematical problems (like factoring large integers or solving discrete logarithms), which can potentially be broken with advancements in computing power or new algorithms. The most well-known example of an information-theoretically secure cryptographic method is **quantum key distribution (QKD)**, particularly the BB84 protocol.