Many zero-knowledge proof projects are threatened by attacks like faking proof, double spending and replaying due to the ‘Input Aliasing’ bug caused by a contract library of zkSNARKs. This applies to many Ethereum open-source projects as well, including 3 most popular zkSNARKs library - snarkjs, ethsnarks, ZoKrates and 3 topical mixcoin apps - hopper, Heiswap, Miximus.

Among publications of Libra, the most attractive thing would be the brand new ‘Move’ programming language. After the first glance at ‘Move’ whitepaper, we came to the idea that this is the future of smart contract language.

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This bug originates from a common practice: calling an arbitrary function appointed by the contract caller from another contract after invoking a function in the current one, while the bug in ATN contract reveals the danger of this approach: the contract caller could bypass authority checks or attack others with the identity of contract itself via this feature.