Which algorithms are not asymmetric-key cryptography?

In DES, the key has _____ usable bits?

The ________ method provides a one-time session key for two parties.

AES encrypt blocks of _____ bits.

Digital signature cannot provide ____ for the message.

If user A wants to send a signed message to user B, the private key of _______ is used to sign the message.

After a message is encrypted, it is called _______.

In an asymmetric-key cipher, the receiver uses the ______ key to decrypt the confidential ciphertext.

In __________cryptography, the same key is used by the sender (for encryption) and the receiver (for decryption).