There are several challenges with information sharing in cybersecurity, including:

Trust: Sharing sensitive information about cyber threats requires a high degree of trust between parties, as there is always a risk of misusing or leaking that information. Building trust can be challenging, particularly when sharing data across different organizations, industries, and countries.

Legal and regulatory barriers: Legal and regulatory barriers can make sharing information about cyber threats difficult, particularly if the information contains personally identifiable information (PII) or other sensitive data subject to data privacy laws.

Lack of standardization: There is no standardization in terms of the format or structure of information shared about cyber threats, which can make it difficult for different organizations to share and interpret that information effectively.

Cultural barriers: Different organizations and industries may have different cultural norms around information sharing, which can make it difficult to establish effective communication and collaboration.

Fear of reputational damage: Organizations may be reluctant to share information about cyber threats for fear of damaging their reputation or public image, mainly if they are seen as having inadequate cybersecurity measures.