What does cryptography primarily ensure?

Cryptography primarily ensures the security of communication from third parties. It involves techniques that protect information by transforming it into an unreadable format, which can only be reverted to a readable format by someone with the correct decryption keys. This process safeguards the confidentiality and integrity of data in transit, ensuring that unauthorized individuals cannot intercept or understand the information being shared. By employing various algorithms and protocols, cryptography enables secure communication over potentially insecure mediums, such as the internet. In today's world, where data breaches and cyber threats are prevalent, the role of cryptography in protecting sensitive information is crucial for individuals and organizations alike.