In cryptography , DES-X -LRB- or DESX -RRB- is a variant on the DES -LRB- Data Encryption Standard -RRB- block cipher intended to increase the complexity of a brute force attack using a technique called key whitening .

In cryptography , DES-X -LRB- or DESX -RRB- is an alternative to the DES -LRB- Data Encryption Standard -RRB- block cipher designed to increase the complexity of a brute force attack using a technique called key whitening .
