Which one of the following statements is WRONG (FALSE) about theoretical (unconditional, absolute) security as opposed to practical security? a. The ciphers that provide theoretical security cannot be broken even with brute-force attack (exhaustive key search). b. It is impossible to achieve theoretical security using public key cryptography. c. Almost every cipher that is used in the internet, including in online banking, is theoretically insecure (does not provide theoretical security). d. Achieving theoretical security is possible for any type of data, e.g. textual, graphical (images, videos), audio, etc. e. Theoretical security can only be achieved with the use of a psuedo random number generator