Providing online, non-downloadable software; providing on-line non-downloadable software for generating cryptographic keys for receiving and spending cryptocurrency; providing on-line non-downloadable software for generating cryptographic keys for receiving and spending crypto assets; providing on-line non-downloadable software for generating cryptographic keys for accessing documents, files, and data; providing on-line non-downloadable software for generating cryptographic keys for establishing and accessing subordinate cryptographic key accounts; application service provider (ASP) featuring e-commerce software for use as a payment gateway that authorizes processing of credit cards or direct payments for merchants; providing temporary use of on-line, non-downloadable software for processing electronic payments; providing temporary use of on-line, non-downloadable software for processing payments by cryptocurrency; providing open-source toolkit software for user interface integration and developing customized payment processing solutions; platform as a service (PAAS) featuring computer software platforms for payment processing; providing temporary use of on-line, non-downloadable software for payment protocol interfaces; providing temporary use of on-line, non-downloadable software for facilitating online payments; providing temporary use of on-line, non-downloadable software for peer-to-peer data transfers; providing temporary use of on-line, non-downloadable software for payment method matching; providing subscription-based temporary use of on-line non-downloadable software for peer-to-peer technology; providing subscription-based temporary use of on-line non-downloadable software for payment processing; providing subscription-based temporary use of on-line non-downloadable software for cryptographic keys; providing subscription-based temporary use of on-line non-downloadable software for payment protocol interfaces for online payments; providing subscription-based temporary use of on-line non-downloadable software for subordinate key account creation and use; providing subscription-based temporary use of on-line non-downloadable software for payment method matching; providing subscription-based temporary use of on-line non-downloadable software for facilitating payments