What is Cross-domain in terms of cybersecurity?

CASP+ Definitions: Cross-domain

Cross-domain in cybersecurity refers to the transfer or sharing of data between different security domains or levels of classification. It involves the secure exchange of data across different security boundaries, such as between classified and unclassified networks, or between different organizations with varying levels of security. Cross-domain solutions (CDS) are typically used to enable secure and controlled information sharing between different domains, while maintaining strict security and access controls. These solutions employ a range of techniques, such as data diodes, secure multi-level processing, and secure file transfer protocols to ensure that data is securely transferred between different security domains.