CPP13 — conversion algorithm not specified

C++ programmers will often want to use strings as
object identifiers, the C++ mapping provides several conversion
functions that convert strings to ObjectId and vice-versa:"

The purpose is so the programmer can pick an arbitrary natural language
string and use it as an ObjectId, not so that the programmer can
generate a randomly unreadable string out of a binary ObjectId.
[...] the C++ mapping provides several conversion functions
that convert strings to ObjectId and viceversa:
[...]
If conversion of an ObjectId to a string would result in
illegal characters in the string (such as a NUL), the first two
functions throw the CORBA::BAD_PARAM exception.

The conversion algorithm is not specified, and the ORB is free to
choose whatever encoding it likes for its Object IDs. (Object IDs
in stringified form need not be moved across address spaces (or,
at least, not across ORB boundaries), so having a proprietary
encoding is perfectly OK.)