Identity information can be stored in a decentralized structure. The identity information may include age verification information for the purchase or operation of certain tobacco products, such as an electronic nicotine delivery systems (“ENDS”) device, which may include aerosol delivery devices. The tobacco products or devices may have an age verification requirement or other identity requirements needed to authenticate a user and that information must be stored. A decentralized structure for storing the identity information may improve the security of that identity information while also providing a mechanism for accessing the information for verification or authentication purposes.