CSP

CSP is an acronym used in several domains. The two most common meanings are Content Security Policy, a browser mechanism that helps mitigate cross-site scripting and data injection, and Constraint Satisfaction Problem, a framework for solving combinatorial search problems in artificial intelligence. Other notable meanings include Communicating Sequential Processes, a theory of concurrent systems, and the Canadian Space Policy, a national strategy.

Content Security Policy defines a set of directives that specify which sources of content are trusted for a given page. It is delivered via an HTTP header or meta tag and can restrict scripts, styles, images, frames, and other resources. Violations can be reported to a defined endpoint. Developers can use nonce or hash-based whitelisting to permit inline scripts safely, and can enable features such as upgrading insecure requests or sandboxing to further limit behavior. Adoption of CSP is a key part of modern web security practices and requires careful testing to maintain site functionality.

Constraint Satisfaction Problem involves variables with finite domains and a set of constraints that restrict allowed combinations of values. A solution assigns to each variable a value that satisfies all constraints. Typical algorithms include backtracking with constraint propagation, arc consistency, and various heuristics. CSPs model a wide range of practical tasks, including scheduling, resource allocation, configuration, and puzzle solving.

Communicating Sequential Processes is a formalism for describing patterns of interaction in concurrent systems, emphasizing communication over shared state and enabling formal reasoning about process composition. Canada’s Canadian Space Policy addresses goals, governance, funding, and international collaboration to advance space science and industry.