answer = AES ("encrypt", plain, key) 
answer = AES ("e",       plain, key) 
answer = AES ("decrypt", cipher, key) 
answer = AES ("d",       cipher, key) 

does encryption and descrption using the AES (advanced encryption standard) algorithm

> k=str2num("0987098709870987")  
k=[48,57,56,55,48,57,56,55,48,57,56,55,48,57,56,55] 

> a=str2num("asdfasdfasdfasdf") 
a=[97,115,100,102,97,115,100,102,97,115,100,102,97,115,100,102] 

> b=aes("e",a,k) 
b=[-103,34,84,18,-46,-58,35,89,80,17,81,118,-4,-15,-93,-31] 

> c=aes("d",b,k) 
c=[97,115,100,102,97,115,100,102,97,115,100,102,97,115,100,102] 

> num2str(c) 
 ans = asdfasdfasdfasdf