4.2 String Format

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SIDs are represented in string form as:

S-1-{authority}-{sub1}-{sub2}-...-{subN}

Where:

S is a literal prefix.
1 is the revision number.
{authority} is the IdentifierAuthority. If the upper 2 bytes are zero, this is the decimal representation of the lower 4 bytes. Otherwise, it is the lowercase hexadecimal representation of all 6 bytes, zero-padded to 12 hex digits and prefixed with 0x.
Each {subN} is the decimal representation of the corresponding 32-bit sub-authority.