Question

If the useful life of the Data Encryption Standard (DES) was about 20 years (1977–1999), how long do you predict the useful life of the Advanced Encryption System (AES) will be? Justify your answer?

Answer 1

Data Encryption Standard is an encryption method which used 56 bits of data as keylength and same method is used to encrypt and decrypt a plain text. It can be easily decoded(broken down) ,so we go for AES(Advanced Encryption Standard). The AES has wide range of keylength namely A-128, A-192 and A-256. Obviously the data which can be encrypted is long since keylength is longer than DES. It is a more secured method compared to DES as the latter uses a Fiestel network which divides the datablock into two blocks and then performs encryption where as in AES they use subsitution and permutation method which involves a series of rounds where data is been substituted and then encrypted. DES is introduced years back mainly for government jobs and secure the data. AES is been used in Java and C implementations while DES was only used in hardware side. Hence AES has more life compared to DES because in the future it will be implemented in upcoming languages like python and so. Hence proven that AES has double the life of DES.