Is it safe to use 7 for S-box exponent in golden poseidon?

iden3 / go-iden3-crypto

Go implementation of some cryptographic primitives (that fit inside the SNARK field) and compatible with circomlib

Apache License 2.0

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Open themighty1 opened 2 years ago

themighty1 commented 2 years ago

Hi, the Poseidon paper only mentions S-box exponents -1, 3, 5 Why does golden poseidon use the exponent 7 ?