# One thing that frustrates me is the difficulty of easily providing # implementations of cryptographic algorithms that would be useful on a # wide range of machines. A lot of these algorithms are really simple, # almost trivial. Yet to write programs to implement them takes pages and # pages of code, and making them portable so that people on PC's, Mac's, and # Unix machines can use them is almost impossible. My experience has been much better. I do have a TCL-based crytpo tookit running, currently on SunOS, although some of the work (RSAREF wrappers) I did on macintosh. I think most of the pieces in this list port to MAC or DOS, using ANSI_C+POSIX emulation: tcl7.0 (John Ousterhout's "Tool Control Language") sprite.berkeley.edu /pub/tcl gmp (gnu miltiple precision) prep.ai.mit.edu /pub/gnu gdbm (gnu database manager) /pub/gnu alo-des (by Antti Louko (alo@kampi.hut.fi)) kampi.hut.fi md2, 4, 5 (reference implementation) ftp.uu.net /inet/rfc/rfc{1319,1320,1321} tclRawTCP (TCP socket, listen, connect for TCL) harbor.ecn.purdue.edu RSAREF 1.1 (beta?) <rsaref-administrator@rsa.com>, includes limited license to practice RSA & DH Along with the tcl7.0 for MAC (for THINK6.*, altho in about 2 hrs I got it running under THINK5.* as well) comes ANSI and enough-of-POSIX libraries, sufficient to do most of what you need. I assume ANSI and enough-of-POSIX are available for PC as well? (I've never done programming on PC, so I can't speak from experience.) And I assume assume we can find TCP (Berkeley Sockets functions) for MAC and PC. This toolkit is sufficient to do most anything we've talked about. I want to supplement this with more stuff -- IDEA, UDP, cme's trans, tripleDES, etc. -- but it already contains at least one implementation of what you need to prototype almost anything we've talked about. TCL is the trick. Using this toolkit, I implemented Knapsack in about 2 hours (because it was my first one), El Gamel in half an hour, and a DH-exchanged- DES-encrypted TCL-shell session over TCP in 2 hours. Most anything becomes a one-evening job, except DC-nets, because it has so many componenets.... I'm trying to shape this into a release. This will have to be a strictly-US-citizen-in-the-USA highly-controlled release, like RSAREF and RIPEM are. Sorry... strick "stricks write code" p.s. perhaps someone could mail me the ftp path to the ITAR again... thx