Abstract: There is provided a system and method for facilitating automatic customized web feed generation via an aggregator server, the server having a processor, a communication subsystem and a memory each in communication with the processor, the memory storing instructions, which when executed by the processor, configure the aggregator server to: communicate with a plurality of web feed sources to request and retrieve web feeds of a plurality of web sites having web pages; aggregate the web feeds from the plurality of web feed sources and web sites into an aggregated web feed; automatically scan web content of each web page within the aggregated web feed and tag each web page within the aggregated web feed having a pre-defined degree of relevance of information pertaining to at least one pre-defined cryptocurrency to a corresponding at least one cryptocurrency identifier; store mapped sets of each tagged web page and corresponding to least one cryptocurrency identifier in a database of the aggregator server; automati

Abstract: A cryptographic transaction processing system provides read and write interfaces to one or more distributed ledger systems managing respective distributed ledger systems (e.g. blockchains). The system uses the read interfaces to obtain distributed ledger data for respective local data stores that store the data optimized for reading. The data includes confirmed and preferably unconfirmed transactions. Client facing interfaces are provided to client wallets to conduct transactions with respective ledgers. A registration interface is provided to wallets to register public parent keys for respective transaction addresses managed by the wallets for transactions conducted with the ledgers. The registration interface provides read registration identifiers in return.

Abstract: A transaction signing system provides a secure manner for signing cryptographically secure data (e.g. cryptographic transaction tracked on distributed ledger systems). An intermediate computing device communicates with a cryptographic transaction processing system and distributed ledger system over a communications network. The intermediate device transmits unsigned transaction data to a transaction signing device through optical over the air communication via an optical output device. The transaction signing device is configured to receive the unsigned transaction data, sign the data using a private key stored on device and transmit signed transaction data optically over the air to the intermediate computing device. The transaction signing device has no other communications systems and is isolated from other communication networks.

Abstract: There is provided a physical redemption device such as a card and a system for purchasers to buy cryptocurrencies through a digital sale system. Cards are printed and packaged using a printer system to include a (secret) unique redemption code in a tamper resistant/tamper evident manner as well as a viewable unique verification code. The cards are distributed through retailers, similar to gift cards, for redemption via an online store or mobile application. Retailers activate the cards for purchasing. The redemption process is provided by an electronic interface (e.g. software system) that provides access to buy a cryptocurrency, preferably from among many different kinds of cryptocurrencies. Redemption uses the respective redemption code applied to each card. The verification code may be used to verify the authenticity and redeemability of the card prior to or after purchase.

Abstract: There is provided a physical redemption device such as a card and a system for purchasers to buy cryptocurrencies through a digital sale system. Cards are printed and packaged using a printer system to include a (secret) unique redemption code in a tamper resistant/tamper evident manner as well as a viewable unique verification code. The cards are distributed through retailers, similar to gift cards, for redemption via an online store or mobile application. Retailers activate the cards for purchasing. The redemption process is provided by an electronic interface (e.g. software system) that provides access to buy a cryptocurrency, preferably from among many different kinds of cryptocurrencies. Redemption uses the respective redemption code applied to each card. The verification code may be used to verify the authenticity and redeemability of the card prior to or after purchase.

Abstract: There is provided a physical redemption device such as a card and a system for purchasers to buy cryptocurrencies through a digital sale system. Cards are printed and packaged using a printer system to include a (secret) unique redemption code in a tamper resistant/tamper evident manner as well as a viewable unique verification code. The cards are distributed through retailers, similar to gift cards, for redemption via an online store or mobile application. Retailers activate the cards for purchasing. The redemption process is provided by an electronic interface (e.g. software system) that provides access to buy a cryptocurrency, preferably from among many different kinds of cryptocurrencies. Redemption uses the respective redemption code applied to each card. The verification code may be used to verify the authenticity and redeemability of the card prior to or after purchase.