Foremost, the full meaning of AES is an advanced encryption standard, while 3DES simply stands for Data Encryption Standard. These are two of the current standards that are in data encryption. AES is known to be encryption that is absolutely new, and which uses the substitution permutation network.
Conversely, 3DES is simply a kind of the older DES encryption, which relied on the balanced Feistel network. This means that DES is being applied 3 times to the encrypted information. AES makes use of three different lengths of the encryption key, which are 256, 192, and 128 bits.
The encryption key of the 3DES still remains at 56 bits, which is the same standard as DES. But the implementer can make a choice of having three identical keys, 1 discrete and 2 identical, or 3 discrete 56 bit keys. When compared to AES, 3DES makes use of a shorter block length. The AES encryption takes a shorter time than the 3DES encryption.