The cryptographer's claim that security mechanisms other than cryptography are unnecessary because cryptography could provide any desired level of confidentiality and integrity is false.
Who is cryptographer?
The cryptography plays a crucial role in safeguarding the confidentiality and integrity of information, it falls short in addressing other critical aspects of information security, particularly availability.
So, Cryptography, at its core, focuses on protecting data from unauthorized access, alteration, or disclosure. It employs techniques like encryption and hashing to ensure that sensitive information remains confidential and unaltered. However, cryptography alone cannot protect against intentional or unintentional disruptions that prevent authorized users from accessing data or systems.