Which of the following cryptographic systems is MOST appropriate for bulk data encryption and
small devices such as smart cards?
Advanced Encryption Standard (AES), a public algorithm that supports keys from 128 to 256 bits
in size, not only provides good security, but provides speed and versatility across a variety of
computer platforms. AES runs securely and efficiently on large computers, desktop computers and
even small devices such as smart cards. DES is not considered a strong cryptographic solution
since its entire key space can be brute forced by large computer systems within a relatively short
period of time. Triple DES can take up to three times longer than DES to perform encryption and
decryption. RSA keys are large numbers that are suitable only for short messages, such as the
creation of a digital signature.