42 Providing temporary use of on-line non-downloadable software and applications for managing, locating, activating and revoking near field communication (NFC) tags, digital keys and identity data; Customization of computer software; Computer software development in the field of mobile applications; Technical and customer support services, namely, troubleshooting of computer problems related to software for use in issuance and management of digital certificates or encryption of authentication and identification data used in near field communication (NFC) tags, digital keys and identity data; Development, design, and implementation of security authentication encryption and identification data for NFC tags, digital keys and identity data; scientific and technical analysis in the field of security, access, authorization, authentication encryption, and identification data and systems for NFC tags and NFC capable devices, namely, NFC enabled cell phones, smart phones and tablets; development, integration and operation of computer systems to support issuance and management of digital certificates for NFC tags and NFC capable devices, namely, NFC enabled cell phones, smart phones and tablets; Development and establishment of testing specifications and procedures in the field of issuance and management of digital certificates for NFC tags and NFC devices, namely, NFC enabled cell phones, smart phones and tablets; Computer services, namely, detection of NFC tags that include viruses, malware and other threats; Design and implementation of software and technology solutions for the purposes of protecting against counterfeiting, tampering and diversion, and to ensure the integrity of NFC tags; Software as a service featuring over the air mobile credentials for provisioning and managing over-the-air mobile credential technology; Data encryption services for identity representation data for others; Designing for others, radio frequency identification (RFID) portable credential formats and related other RFID security data, namely, creating custom credential formats and unique data identifiers used in cards, tags, fobs, tokens and NFC enabled smart phones and other mobile credential devices for use with secure physical access control systems and network security system applications; Designing and providing for others security synchronization electronic data for use between authentication devices and credentials, namely, cards, tags, fobs, tokens and NFC enabled smart phones and other mobile credential devices to enable the secure protection and transport of credential data and other RFID security related information, namely, data programing services to enable matching interoperability between physical access control and network security system authentication devices and system secure credentials, namely, cards, tags, fobs tokens and NFC enabled smart phones and other mobile credential devices; Providing custom graphic design for personalization of RFID portable credentials, namely, cards, tags, fobs, tokens and NFC enabled smart phones