3.6.1 ECDSA
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Availability::- use_module(library(crypto)).(can be autoloaded)
Source[semidet]ecdsa_verify(+Key, +Data, +Signature, +Options)
True iff Signature can be verified as the ECDSA signature for Data, using the EC public key Key.

Options:

encoding(+Encoding)
Encoding to use for Data. Default is hex. Alternatives are octet, utf8 and text.