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Andreas Mantzoutas is a dedicated security researcher with experience at OtterSec since September 2023 and previously at Chaintroopers from March 2023 to August 2023. As an external content creator for Hack The Box from November 2022 to February 2024, Andreas developed blockchain category challenges and contributed significantly to the majority of blockchain challenges for the 2023 editions of CyberApocalypse and BusinessCTF. Andreas holds a bachelor's degree in computer science from the National Technical University of Athens, with studies spanning from September 2017 to December 2023.