Disallowed key characters什麼意思

"Disallowed key characters" is a term used in programming and computer science, particularly in the context of cryptography and security. It refers to characters that are not allowed or are prohibited within a certain context, such as in a password, a key, or a specific field in a database or a form.

For example, in the context of a password, disallowed key characters might include characters that are considered weak or easily guessable, such as common words, personal information, or characters that can be easily brute-forced. In the context of a cryptographic key, disallowed key characters might include characters that are not compatible with the encryption algorithm or that could weaken the security of the key.

The specific characters that are disallowed can vary depending on the context and the security requirements. It is important to follow best practices and guidelines to ensure that only strong and secure characters are used in sensitive contexts.