The Ethereum Foundation has opted to transition away from using the Poseidon hash function in its future base-layer designs, as announced by core researcher Justin Drake. This shift stems from advancements in proof systems, particularly those that operate over binary fields.
Continue Reading:Ethereum’s Cryptographic Shift: Rethinking Hash Functions
Source: https://en.bitcoinhaber.net/ethereums-cryptographic-shift-rethinking-hash-functions