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How many bits does 3DES (variant DES-EEE3) encryption use?
1024
168
876
The 3DES variants of DES-EEE3 and DES-EDE3 have effective key lengths of 168 bits. However, DES-EEE2 and DES-EDE2 variants have effective key lengths of 112 bits. 2018 CISSP Official Study Guide, p. 222
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