Forum Discussion
amolari
Apr 09, 2015Cirrostratus
there was a thread about that here
It seems to be a "bug".. 192 comes from 3x64 (64 is the block size).
If in theory it's 168 bits key length, it has been degraded to 112 due to vulnerabilities.
From NIST 800-57:
"One might expect that 3TDEA would provide 56×3 = 168 bits of strength. However, there is an attack on 3TDEA that reduces the strength to the work that would be involved in exhausting a 112 bit key"