Defines syntax for a more compact certificate than that defined in ISO 15782-1 and X.509. This syntax is appropriate for use in environments with constraints imposed by mobility and/or limited bandwidth (e.g., wireless communications with personal digital assistants), high volumes of transactions (e.g., Internet commerce), or limited storage capacity (e.g., smart cards). This syntax is also geared towards use in account-based systems such as X9.59.