Triple DES
Triple DES (3DES or TDEA) is a symmetric-key block cipher that applies the DES cipher algorithm three times to each data block. Triple DES increases the effective security of the 56-bit DES to 112 bits.
Attacks
Weak keys
As with DES, the Triple DES block cipher has several weak keys that should be checked for, such as:
0000000000000000FFFFFFFFFFFFFFFFFB13347FE570DC4FFB13347FE570DC4F
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