None
The bit string consisting of the s right-most bits of the bit string X.
Source(s):
NIST SP 800-38B
NIST SP 800-38C
NIST SP 800-38F
The bit string consisting of the s right-most bits of the bit string X. MSBs (X) The bit string consisting of the s left-most bits of the bit string X.
Source(s):
NIST SP 800-38D
under LSBs (X)