For a positive integer s, 0s is the string that consists of s consecutive 0 bits.
Source(s):
NIST SP 800-185
The bit string that consists of s ‘0’ bits.
Source(s):
NIST SP 800-38B
NIST SP 800-38D
The bit string that consists of s consecutive ‘0’ bits.
Source(s):
NIST SP 800-38F