Report

This technical report presents a statistical and security-oriented analysis of entropy weaknesses in the generation of BIP39 mnemonic phrases. It highlights the emergence of detectable patterns and biases that may compromise the randomness expected in 12- and 24-word recovery phrases. Through large-scale testing and validation, the report demonstrates how such structural irregularities can significantly reduce the effective keyspace, making certain seed phrases more predictable than theoretically assumed. All findings are documented within an ethical research framework and are intended to encourage further academic and technical scrutiny. No exploit code or sensitive data is included.