Answer:
its copyright has expired
Explanation:
If a work is in the public domain it means that it's copyrighte has been expired.
After the period of copyright protection has expired, a work becomes available for use without permission from the copyright owner; it is now said to be "in the public domain." Most works enter the public domain because their copyrights have expired.
Answer:
A(n) <u>Cipher</u> or crypto-system is an encryption method or process encompassing the algorithm, key(s) or crypto-variable(s), and procedures used to perform encryption and decryption.
Explanation:
- Cryptography is such a technique that is used for the secure transfer of the information. We make codes for this purpose.
- Cryptosystem is such a system in cryptography is simply an encryption method that has three algorithms. One algorithm is used for the generation of key, one for encryption and decryption.
- Encryption is a process of converting the information in a data that is not understandable and decryption, this non-understandable data is converted into information so that we can read it.
Answer:
A
Explanation:
B is a print statement.
C is a function invocation
D is a function declaration
A prototype is actually quite close to a declaration. The semi-colon at the end shows that no implementation will follow. Adding parameter names is allowed but would only be helpful for better understanding.
