A device, method and system for changing communication infrastructure based on call security level is provided. A device determines a call security level of a call occurring at a first communication infrastructure; the first communication infrastructure associated with a first security level; the call security level determined from one or more of; a profile of a caller on the call; and audio on the call. In response to determining that the call security level and the first security level are misaligned, the device causes the call to change to a second communication infrastructure associated with a second security level aligned with the call security level.

A communication system including a first device (1a, 1a′) and a second device (1b, 1b′). The first device (1a, 1a′) comprises a memory storing first-device-specific identification data and the second device (1b, 1b′) comprises a memory storing second-device-specific identification data. The first device (1a, 1a′) is configured to receive a copy of the second-device-specific identification data and to store the copy in the memory of the first device (1a, 1a′) and the second device (1b, 1b′) is configured to receive a copy of the first-device-specific identification data and to store the copy in the memory of the second device (1b, 1b′). The first device (1a, 1a′) is configured to derive a first encryption key from the first-device-specific identification data and the received copy of the second-device-specific identification data. The second device is configured to derive the first encryption key from the second-device-specific identification data and the received copy of the first-device-specific identification data. The first device (1a, 1a′) encrypts transmission data using the first encryption key and transmits the encrypted transmission data to the second device (1b, 1b′). The second device (1b, 1b′) receives the encrypted transmission data from the first device (1a, 1a′) and decrypts the encrypted transmission data using the first encryption key.

Methods and apparatus are disclosed for enabling digital content from a content provider (12, 5 14) to be provided via a communication network (10) from intermediate digital content stores (16) to user-devices (18). According to one aspect, the method comprises the content provider (12, 14) providing digital content encrypted using a cryptographic encryption key to an intermediate digital content store (16), the cryptographic encryption key being a public key of a key-pair and having an associated private key. In response to a request from a user-device (18) to the content provider (12, 14) for the digital content, a cryptographic session key is shared between the content provider (12, 14) and the requesting user-device (18). The content provider (12, 14) provides to the intermediate digital content store (16) the cryptographic re-encryption key and indications of the requested digital content and of the user-device (18).

A method for deriving a partial signature for a subset of a set of messages. The method is implemented by a partial signature derivation entity and includes: receiving the set of messages and a signature of the set of messages, the signature including signature elements of the set of messages; deriving a first verification element calculated from the messages of the set other than those of the subset; deriving a second verification element to prove that the first verification element is formed correctly; and sending to a verification entity a partial signature specific to the subset, the partial signature including a constant number of elements having at least the elements of the signature of the set of messages, the first verification element and the second verification element, the partial signature being verifiable with only messages of the subset.

A method for activating an operational profile installed in a user device which is accessible to a radiocommunication network. The operational profile includes data which allows the user device to access the radiocommunication network. In such a method, the user device carries out a step of deactivating a current operational profile and activating a passive operational profile. The passive operational profile: prevents the user device from sending to the radiocommunication network at least one location update request and/or at least one attachment request to the radiocommunication network; and allows the user device to receive at least one radio-paging message including a unique identifier for the user device.

A device and a method implemented by computer for authorizing, to a user having access rights granted by a first operator, a completely anonymous and secure access, with no trusted third-party, to a collaborative anonymization platform and/or to a service requiring privacy properties based on such a platform operated by various operators.

Provided is an input/output system applied to a network security defense system. A structural encoding unit and an error correction decoding unit are divided. The structure encoding unit is divided into input branch module and an input proxy module; and the error correction decoding unit is divided into an output routing module, an output proxy module, an adjudication branch module, an adjudication proxy module and a voting module. The input branch module is used for duplicating and distributing messages, the arbitration branch module is used for duplicating and distributing data, the voting module is used for performing voting, and the output routing module is used for selecting an output result from processing results of the output proxy module according to a voting result of the voting module.

A system and method for preventing hacking of blockchain is proposed. The system includes a cryptocurrency owner configured to own a cryptocurrency wallet storing a cryptocurrency, a public key, and a private key, and capable of setting monitoring-subjected data and monitoring-excluded data, a hacking countermeasure system configured to check status of the cryptocurrency wallet by being connected to the cryptocurrency owner to receive the cryptocurrency and the public key, invalidate a hacking transaction when the hacking transaction matching the monitoring-subjected data is received, and allow the cryptocurrency to be traded by opening the cryptocurrency wallet with the private key and process transaction details into a block file when a monitoring-excluded transaction matching the monitoring-excluded data is received, and a blockchain network configured to receive the block file from the hacking countermeasure system and duplicate the block file into a plurality of block files to distribute and store each block file.

There are provided measures for trust related management of artificial intelligence or machine learning pipelines. Such measures exemplarily include, at a first network entity managing artificial intelligence or machine learning trustworthiness in a network, transmitting a first artificial intelligence or machine learning trustworthiness related message towards a second network entity managing artificial intelligence or machine learning trustworthiness in an artificial intelligence or machine learning pipeline in the network, and receiving a second artificial intelligence or machine learning trustworthiness related message from the second network entity, where the first artificial intelligence or machine learning trustworthiness related message includes at least one criterion related to an artificial intelligence or machine learning trustworthiness aspect.

A messaging system for exchanging messages between nodes in a network via a broker that uses a publish-subscribe message protocol, which nodes have object identifications (IDs). Messages between the nodes are routed using the object IDs of the nodes. Secure communication is provided using authentication according to digital certificates being used as first and second tiers by a commissioning broker and a data broker, respectively, in which the second tier certificate used by the data broker has a shorter lived expiration time.