However , this option is susceptible to certain chosen-plaintext or known-plaintext attacksRalph PERSON@1 , PERSON@2 : On the Security of Multiple Encryption -LRB- PDF -RRB- , Communications of the MISC@1 , Vol NUMBER@1 , No NUMBER@2 , pp NUMBER@3 -- NUMBER@4 , July NUMBER@5 .

However , this mode is susceptible to certain chosen-plaintext or known-plaintext attacks PERSON@3 , PERSON@2 : On the Security of Multiple Encryption -LRB- PDF -RRB- , Communications of the MISC@1 , Vol NUMBER@1 , No NUMBER@2 , pp NUMBER@3 -- NUMBER@4 , July NUMBER@5 .
