In one embodiment, data communication apparatus includes packet processing circuitry to receive data from a memory responsively to a data transfer request, and cryptographically process the received data in units of data blocks using a block cipher so as to add corresponding cryptographically processed data blocks to a sequence of data packets, the sequence including respective ones of the cryptographically processed data blocks having block boundaries that are not aligned with payload boundaries of respective one of the packets, such that respective ones of the cryptographically processed data blocks are divided into two respective segments, which are contained in successive respective ones of the packets in the sequence, and a network interface which includes one or more ports for connection to a packet data network and is configured to send the sequence of data packets to a remote device over the packet data network via the one or more ports.

A privileged node holds a secret key (SKEY), and normal nodes each hold a public key (PKEY). The normal nodes each include a transaction inputting unit that receives transaction data (TDATA), a transaction transmitting unit that transmits the TDATA, a transaction managing unit that manages a transaction history in a form of blockchain, and a block receiving unit that receives blocks from the privileged node. The privileged node includes a transaction receiving unit that receives TDATA from each of the normal nodes, a block generating unit that generates a signature value (SIG) on the basis of a SKEY, and generates a block containing TDATA and the SIG, and a block transmitting unit that transmits blocks. The transaction managing unit adds a block to the blockchain on condition that the authenticity of the SIG in the block is confirmed by using the PKEY.

This document includes techniques, apparatuses, and systems related to an interface for revision-limited memory, which can improve various computing aspects and performance. In aspects, confidentiality, integrity, and availability may be ensured while increasing the performance of revision-limited memory. In this example, the techniques also enable the digital computing device to interact with information related to the revision-limited memory.

Systems, methods, and apparatus are provided for a dynamic contract payment term (“payterm”) generator. A machine learning algorithm may generate a replacement payment term for a contract based on market-based parameters and blockchain metadata for the contract. The blockchain metadata may encode hierarchical interdependencies between contracts using blockchain encryption. The blockchain metadata may be applied to auto-generate machine learning inputs for related contracts having interdependent payment terms. The machine learning inputs may include contract parameters that have been extracted and encrypted as blockchain metadata, as well as market-based parameters extracted from enterprise sources.

A method including determining, by a first device, a sharing encryption key based at least in part on an access private key associated with encrypted content and an assigned public key associated with a second device; encrypting the access private key associated with the encrypted content utilizing the sharing encryption key; and transmitting the encrypted access private key to enable the second device to access the encrypted content. Various other aspects are contemplated.

A method including determining, by a first device, a sharing encryption key based at least in part on an access private key associated with encrypted content and an assigned public key associated with a second device; encrypting the access private key associated with the encrypted content utilizing the sharing encryption key; and transmitting the encrypted access private key to enable the second device to access the encrypted content. Various other aspects are contemplated.

Techniques are described that include creating and retrieving equipment information via a digital distributed ledger-based system. The techniques include authenticating a user of a digital distributed ledger-based system. The techniques further include receiving an operations data from the user, wherein the operations data comprises equipment data logged during operations of an equipment. The techniques additionally include storing the operations data and identification information for the equipment in at least one or more blocks of a digital distributed ledger, and distributing the one or more blocks among nodes of the digital distributed ledger, wherein the digital distributed ledger is configured to immutably store the operations data.

Provided is a non-transitory computer readable medium. The non-transitory computer readable medium storing program code that, when is executed by a processor, causes the processor to calculate a message, based on a first cipher text, a second cipher text, and a private key, to compare a coefficient of the message with a reference value based on a prime number, to decide a coefficient of a modified message, based on a comparison result between the coefficient of the message and the reference value, and to decrypt the modified message.

Digital or “smart” contracts execute in a blockchain environment. Any entity (whether public or private) may specify a digital contract via a contract identifier in a blockchain. Because there may be many digital contracts offered as virtual services, the contract identifier uniquely identifies a particular digital contract offered by a virtual machine, vendor or supplier. The blockchain is thus not burdened with the programming code that is required to execute the digital contract. The blockchain need only include or specify the contract identifier (and perhaps one or more contractual parameters), thus greatly simplifying the blockchain and reducing its size (in bytes) and processing requirements.

Aspects of the disclosure support a server that supports a method for action tracking and deeds between multiple parties using a blockchain. The method may include providing a marketplace for projects, receiving a selection of a project, deploying a smart contract, determining a funding amount is transmitted to the smart contract, and activating a monitoring service. The monitoring service may monitor a data feed of an external system to determine whether a triggering action is performed. The data feed may include data corresponding to actions performed on the external system by a plurality of user identifiers in association with the sponsor. The method may further include causing a funding release action to be executed by the smart contract in accordance with the triggering action being performed, such that at least a portion of the funding amount to the sponsor, a provider for the project, or both.