Abstract: A system and method for homomorphic encryption in a healthcare network environment is provided and includes receiving digital data over the healthcare network at a data custodian server in a plurality of formats from various data sources, encrypting the data according to a homomorphic encryption scheme, receiving a query at the data custodian server from a data consumer device concerning a portion of the encrypted data, initiating a secure homomorphic work session between the data custodian server and the data consumer device, generating a homomorphic work space associated with the homomorphic work session, compiling, by the data custodian server, a results set satisfying the query, loading the results set into the homomorphic work space, and building an application programming interface (API) compatible with the results set, the API facilitating encrypted analysis on the results set in the homomorphic work space.

Abstract: Digital certificates are generated for devices by a Certificate Authority (CA), which communicates with devices via another entity—registration authority (RA)—so that the CA and RA cannot associate certificates with devices. Each certificate is associated with a public signature key, and with a public encryption key used by CA to encrypt the certificate to hide it from the RA. Both keys are derived by CA from a single key. For example, the signature key can be derived from the public encryption key rather than generated independently. However, high security is obtained even when the CA does not sign the encrypted certificate. Reduced bandwidth and computational costs are obtained as a result. Other embodiments are also provided.

Abstract: To revoke a digital certificate, activation of the digital certificate is blocked by withholding an activation code from the certificate user. The certificates are generated by a plurality of entities in a robust process that preserves user privacy (e.g. anonymity) even in case of collusion of some of the entities. The process is suitable for connected vehicles, e.g. as an improvement for Security Credential Management System (SCMS).

Abstract: According to some embodiments, in a Vehicular-to-Everything (V2X) communications environment where vehicles can exchange messages with other entities, including nearby vehicles and pedestrians, systems and methods are provided to implement a mechanism or technique based on hash chaining that allows a large sequence of messages from the same source to be validated by verifying a single digital signature.

Abstract: An authenticated, ID-based private/public key pair, with a self-certified public key, is generated using Kummer arithmetic without bilinear pairings. Two or more parties can generate such key pairs and use them as their respective long-term key pairs which, when combined with the parties' short-term key pairs, can allow the parties to establish an authenticated, short-term shared key. Some embodiments are suitable for connected vehicles communicating with each other and/or with other systems. Other features are also provided.

Abstract: A system and method for homomorphic encryption in a healthcare network environment is provided and includes receiving digital data over the healthcare network at a data custodian server in a plurality of formats from various data sources, encrypting the data according to a homomorphic encryption scheme, receiving a query at the data custodian server from a data consumer device concerning a portion of the encrypted data, initiating a secure homomorphic work session between the data custodian server and the data consumer device, generating a homomorphic work space associated with the homomorphic work session, compiling, by the data custodian server, a results set satisfying the query, loading the results set into the homomorphic work space, and building an application programming interface (API) compatible with the results set, the API facilitating encrypted analysis on the results set in the homomorphic work space.

Abstract: A system and method for homomorphic encryption in a healthcare network environment is provided and includes receiving digital data over the healthcare network at a data custodian server in a plurality of formats from various data sources, encrypting the data according to a homomorphic encryption scheme, receiving a query at the data custodian server from a data consumer device concerning a portion of the encrypted data, initiating a secure homomorphic work session between the data custodian server and the data consumer device, generating a homomorphic work space associated with the homomorphic work session, compiling, by the data custodian server, a results set satisfying the query, loading the results set into the homomorphic work space, and building an application programming interface (API) compatible with the results set, the API facilitating encrypted analysis on the results set in the homomorphic work space.

Abstract: Improved pseudonym certificate management is provided for connected vehicle authentication and other applications. Temporary revocation of a certificate is enabled. With respect to Security Credential Management Systems (SCMS), pre-linkage values can be employed. The pre-linkage values can be encrypted using homomorphic encryption. Other embodiments are also provided.

Abstract: Embodiments described herein provide a tree-based key management protocol with enhanced computational and bandwidth efficiency. A tree structure including a plurality of nodes is formulated according to modules in a vehicle. A group key and a blinded key are computed for a leaf node from the plurality of nodes based at least in part on a multiplication operation defined in an ecliptic curve group. Or a group key and a blinded key are recursively computed for a non-leaf node based at least in part on a key derivation function and the multiplication operation involving a group key and a blinded key corresponding to nodes that is one level down to the non-leaf node.

Abstract: In a vehicle-to-everything (V2X) technology environment, systems and methods are provided for extending the distribution of activation codes (ACs) in an Activation Codes for Pseudonym Certificates (ACPC) system, in a privacy-preserving manner, to a unicast mode of communication. In this unicast ACPC (uACPC), in some embodiments, the ACs are distributed by the back-end system via a unicast channel upon the receipt of the vehicle's direct request for its respective ACs. In some embodiments, uACPC can leverage edge computing architecture for low latency delivery of certificate revocation lists (CRLs) and higher availability for the distribution of ACs.

Abstract: A method for providing ciphertext data by a first computing device having memory includes obtaining, from the memory, plaintext data having a structure; providing the plaintext data to a structure preserving encryption network (SPEN) to generate the ciphertext data, where the structure of the plaintext data corresponds to a structure of the ciphertext data; and communicating, from the first computing device to a second computing device, the ciphertext data to permit analysis on the ciphertext data.

Abstract: In some embodiments, a security device comprises a context information intake device, a sensor, and a controller. The controller is configured to activate the context information intake device when the sensor detects an activation event initiated by an object such that the context information intake device records context information associated with the object; and perform a context-aware cryptographic process to cryptographically authenticate the object using attribute-based access control based on the recorded context information associated with the object.

Abstract: A system and method for homomorphic encryption in a healthcare network environment is provided and includes receiving digital data over the healthcare network at a data custodian server in a plurality of formats from various data sources, encrypting the data according to a homomorphic encryption scheme, receiving a query at the data custodian server from a data consumer device concerning a portion of the encrypted data, initiating a secure homomorphic work session between the data custodian server and the data consumer device, generating a homomorphic work space associated with the homomorphic work session, compiling, by the data custodian server, a results set satisfying the query, loading the results set into the homomorphic work space, and building an application programming interface (API) compatible with the results set, the API facilitating encrypted analysis on the results set in the homomorphic work space.

Abstract: According to some embodiments, systems and methods are provided for revoking one or more of a plurality of entities in a vehicular public-key infrastructure. The systems and methods balance privacy and efficiency by distributing activation codes according to various approaches, including a direct request approach, a fixed-size subset approach, and a variable-size subset approach.

Abstract: Embodiments described herein provide systems and methods to prevent, or provide a countermeasure, to a co-existence attack, for example, that may occur in a Security Credential Management System (SCMS) where both regular butterfly key (RBK) protocol and unified butterfly key (UBK) protocol are supported. Embodiments described herein provide, support, employ, or implement hardware acceleration for a Hardware Security Module (HSM), for example, for cryptographic operations (e.g., block ciphers, digital signature schemes, and key exchange protocols).

Abstract: A system and method for homomorphic encryption in a healthcare network environment is provided and includes receiving digital data over the healthcare network at a data custodian server in a plurality of formats from various data sources, encrypting the data according to a homomorphic encryption scheme, receiving a query at the data custodian server from a data consumer device concerning a portion of the encrypted data, initiating a secure homomorphic work session between the data custodian server and the data consumer device, generating a homomorphic work space associated with the homomorphic work session, compiling, by the data custodian server, a results set satisfying the query, loading the results set into the homomorphic work space, and building an application programming interface (API) compatible with the results set, the API facilitating encrypted analysis on the results set in the homomorphic work space.

Abstract: Modulus operation is performed by a system in an efficient manner taking into account the system's processor and memory architecture. Other features are also provided.

Abstract: Embodiments described herein provide systems and methods to prevent, or provide a countermeasure, to a co-existence attack, for example, that may occur in a Security Credential Management System (SCMS) where both regular butterfly key (RBK) protocol and unified butterfly key (UBK) protocol are supported. Embodiments described herein provide, support, employ, or implement hardware acceleration for a Hardware Security Module (HSM), for example, for cryptographic operations (e.g., block ciphers, digital signature schemes, and key exchange protocols).

Abstract: Embodiments described herein provide systems and methods to prevent, or provide a countermeasure, to a co-existence attack, for example, that may occur in a Security Credential Management System (SCMS) where both regular butterfly key (RBK) protocol and unified butterfly key (UBK) protocol are supported. Embodiments described herein provide, support, employ, or implement hardware acceleration for a Hardware Security Module (HSM), for example, for cryptographic operations (e.g., block ciphers, digital signature schemes, and key exchange protocols).

Abstract: To revoke a digital certificate, activation of the digital certificate is blocked by withholding an activation code from the certificate user. The certificates are generated by a plurality of entities in a robust process that preserves user privacy (e.g. anonymity) even in case of collusion of some of the entities. The process is suitable for connected vehicles, e.g. as an improvement for Security Credential Management System (SCMS).