Stabilized Technical Report
UTS #6, "A Standard Compression Scheme for Unicode"
has been stabilized:
There are no plans to ever publish another update for it.
The last version can be found at
SCSU defines a compact encoding, which is sometimes useful.
However, Unicode text is much more commonly stored and transmitted in UTF-8
which is less compact (except for ASCII), much simpler, and
does not present any security issues.
For longer texts, general-purpose compression is effective and common.
Therefore, there is no need to develop this report any further.