Thanks for the clarification. While I am aware that Curve25519 is not Ed25519 is not ECDSA, they all at least belong into the field of Elliptic Curve Cryptograp

Thanks for the clarification. While I am aware that Curve25519 is not Ed25519 is not ECDSA, they all at least belong into the field of Elliptic Curve Cryptography. It is hard for an outsider to tell how wide a certain sub-field is, and how far the related work research should go. I merely took the hints from the paper, which addressed ECC in some places, and wrongfully concluded that DJB's research would be still on topic.