Foreword

Short introduction

Modern cryptocurrencies like Bitcoin rely on blockchain technology and make use of various cryptographic algorithms. The average user of a cryptocurrency has little knowledge of how the underlying system works, and what assumptions have to be satisfied, which guarantees that a user’s wallet can’t be accessed by an unauthorized person. Even if the content of a wallet is safeguarded carefully and transactions are done in an intended manner, the user might wonder to what degree cryptography guarantees anonymity and security of the funds.