E-Cash denotes electronic money systems designed to function like physical cash in digital transactions. These systems prioritize user privacy and often allow for offline transactions, aiming to replicate the anonymity and directness of physical currency. Early implementations relied on cryptographic protocols to ensure double-spending prevention without requiring a central authority for every transaction. Modern interpretations often consider central bank digital currencies (CBDCs) or privacy-focused stablecoins as forms of E-Cash.
Context
The concept of E-Cash is gaining renewed attention with global interest in CBDCs, sparking discussions about digital monetary sovereignty and surveillance risks. Debates surround the optimal balance between privacy features and regulatory oversight for digital currencies. Future developments will likely involve the integration of advanced cryptographic techniques to secure E-Cash systems and ensure their resilience against various threats.
This research presents practical non-interactive blind signature constructions using standard PKI keys, enabling widespread anonymous digital token issuance without revealing user data.
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