What is a feature of cryptographical techniques?

Cryptographical techniques are designed primarily to protect data from unauthorized access. This is achieved through various methods such as encryption, which involves converting data into a coded format that can only be read or deciphered by those who have the appropriate key or permission. Cryptography enhances the confidentiality and integrity of information, making it difficult for unauthorized users to access or alter sensitive data.

This protective characteristic is crucial in many applications, from securing online communications to safeguarding confidential information in databases. By transforming readable data into an unreadable format for anyone lacking the key, cryptography effectively secures data against potential threats from hackers and other malicious actors, thereby ensuring that only authorized individuals can access the data.