In the above paper “A Conditional Privacy-Preserving Certificateless Aggregate Signature Scheme in the Standard Model for VANETs. ” a pairing-based certificateless aggregate signature (CLAS) scheme was proposed. However. a malicious-but-passive KGC attack on this scheme was subsequently presented by Shim. https://www.diegojavierfares.com/mega-grab-Pilot-Rock-H-16-B6X2-Park-Style-Outdoor-BBQ-Charcoal-Grill-w-Swivel-4-Pack-p12685-super-choice/