+
+ /**
+ * Sp is altered by flipping its 42nd bit.
+ * @param m the message to sign. No padding is used.
+ */
+ static mpz_class signWithFaultySp(const mpz_class& m, const KeyPriv& kPriv);
+
+private:
+ static mpz_class sign(const mpz_class& m, const KeyPriv& kPriv, bool withError);