Methods, systems, and devices for encrypting and decrypting data. In one implementation, an encryption method includes inputting plaintext into a recurrent artificial neural network, identifying topological structures in patterns of activity in the recurrent artificial neural network, wherein the patterns of activity are responsive to the input of the plaintext, representing the identified topological structures in a binary sequence of length L and implementing a permutation of the set of all binary codewords of length L. The implemented permutation is a function from the set of binary codewords of length L to itself that is injective and surjective.

This disclosure relates to a method for vertical federated learning. In multiple participation nodes deployed in a multi-way tree topology, an upper-layer participation node corresponds to k lower-layer participation nodes. After the upper-layer participation node and the k lower-layer participation nodes exchange public keys with each other, the upper-layer participation node performs secure two-party joint computation with the lower-layer participation nodes with a first public key and second public keys as encryption parameters to obtain k two-party joint outputs of a federated model. Further, the upper-layer participation node aggregates the k two-party joint outputs to obtain a first joint model output corresponding to the federated model. As such, a multi-way tree topology deployment-based vertical federated learning architecture is provided, improving the equality of each participation node in a vertical federated learning process.

The disclosure provides an approach for certificate management for cryptographic agility. Embodiments include receiving, by a cryptographic agility system, a cryptographic request related to an application. Embodiments include selecting, by the cryptographic agility system, a cryptographic technique based on contextual information associated with the cryptographic request. Embodiments include determining, by the cryptographic agility system, based on the cryptographic request, a certificate for authenticating a key related to the cryptographic technique. Embodiments include providing, by the cryptographic agility system, the certificate to an endpoint related to the cryptographic request for use in authenticating the key.

The disclosure provides an approach for cryptographic agility. Embodiments include establishing, by a proxy component associated with a cryptographic agility system, a first secure connection with an application. Embodiments include receiving, by the proxy component, via the first secure connection, a communication from the application directed to an endpoint. Embodiments include selecting, by the cryptographic agility system, a cryptographic technique based on contextual information related to the communication. Embodiments include establishing, by the proxy component, a second secure connection with the endpoint based on the cryptographic technique. Embodiments include transmitting, by the proxy component, a secure communication to the endpoint via the second secure connection based on the communication.

Methods for quantum key distribution are disclosed including forming a quantum production key package with a production file name; forming a first quantum sacrificial key package with a first sacrificial file name associated with a portion of the first production file name; sending the quantum sacrificial key package to a sacrificial key server; and sending the quantum production key package to computer devices to set up a quantum key encryption tunnel between the computer devices. The quantum production key packages are received by computer devices that send the production file name to the sacrificial key server to receive the sacrificial return key. The sacrificial return key is used to decrypt the quantum production key package with the quantum production keys. A first quantum production key is retrieved to encrypt and decrypt data at each computer device.

Systems, methods and devices for implementing cryptographic and security-in-depth techniques on-board spacecrafts or satellites are provided, to allow users to task activities or retrieve satellite data from the satellite system in an anonymous, secure, safe, and private manner, such that no other user sharing the satellite system resources can know what has been tasked or transmitted to the ground. Considerable advantages can be realized by providing spacecraft or satellite systems with a substantial capacity of applying security-in-depth and cryptographic techniques and protocols to data and requests, based on autonomous tasking, allowing a secure, safe and private use of spacecraft or satellite resources.

The present disclosure involves systems, software, and computer implemented methods for key pattern management. One example method includes receiving a query for a logical database table from an application. A determination is made as to whether the query is a write query. In response to determining that the query is a write query, a determination is made as to whether the query complies with a key pattern configuration that describes keys of records included in a physical database table that is part of a logical table implementation. The physical table includes records of the logical database table that are allowed to be written by the application. The write query is redirected to the physical database table in response to determining that the query complies with the key pattern definition. The query is rejected in response to determining that the query does not comply with the key pattern configuration.

Systems and methods for securely pairing a transmitting device with a receiving device are described. The systems and methods may communicate with a first device via a first communication method over a wireless communication network. The systems and methods may transmit, to the first device via a second communication method, a first sensory pattern representing a first key. In addition, the system and methods may communicate with the first device via the first communication method using the first key.

A transaction is pre-staged by providing transaction preferences, such as a financial instrument, a transaction type, and a transaction amount, to a user device. The user device captures a visual code at a terminal, such as an ATM. The visual code includes terminal attributes, including a signed hash and call-back URI. The user device authenticates the visual code using the signed hash and requests the transaction through the issuer server. The issuer server creates and sends the card data to the call-back URI. The terminal uses the card data to create a transaction request it routes to through its acquirer server.

A method of authenticating a consumable or detachable element of a continuous inkjet printer comprising: the controller of the printer generating a 1.sup.st item of random information that is dispatched to an authentication circuit of the element; encrypting the 1.sup.st item of information by the authentication circuit using a 1.sup.st encryption algorithm and a 1.sup.st secret key to form a 1.sup.st item of encrypted random information; dispatching the 1.sup.st item of information to the controller; encrypting the 1.sup.st item of information by the controller using a 2.sup.nd encryption algorithm and a 2.sup.nd secret key to form a 2.sup.nd item of encrypted random information; comparing the 1.sup.st item of encrypted random information with the 2.sup.nd encrypted item of random information to authenticate the consumable element; and if the consumable element is authenticated, dispatching at least one part of a 3.sup.rd key, termed the shared key, by the element to the printer.