docs: public static boolean verifyEpochPK(PublicKey pk, Idemix.ECP2 epochPK, byte[] epochPkSig, long epoch, RevocationAlgorithm alg) throws CryptoException {
          Idemix.CredentialRevocationInformation.Builder builder = Idemix.CredentialRevocationInformation.newBuilder();
          builder.setRevocationAlg(alg.ordinal());
          builder.setEpochPk(epochPK);
          builder.setEpoch(epoch);
          Idemix.CredentialRevocationInformation cri = builder.build();
          byte[] bytesTosign = cri.toByteArray();
          try {
              Signature dsa = Signature.getInstance("SHA256withECDSA");
              dsa.initVerify(pk);
              dsa.update(bytesTosign);
  
              return dsa.verify(epochPkSig);
          } catch (NoSuchAlgorithmException | SignatureException | InvalidKeyException e) {
              throw new CryptoException("Error during the EpochPK verification", e);
          }
      }