On Mon, 30 Oct 1995, Eric Young wrote:
On Sat, 28 Oct 1995, Anonymous wrote:
Electronic Engineering Times Oct 23, 1995 p. 66
T.R MADHUSUDAN SASTRY, T. GANESAN, B.MADHUKAR AND N. SRINIVASA
involved. The current implementation of Idea in ECB on Motorola's DSP 56166 running at 60 Mhz supports up to 625 kbits/second in full-duplex mode. That is 3.6 > times faster than using the DES algorithm.
That last statement is rubbish. For most CPU's I've seen, IDEA is either the same speed as DES or a bit slower. There is no way that it is 3 times faster that single DES.
My implementation of IDEA on the TI TMS320C26 DSP runs at 99 kbytes/sec. I havent't tried DES, but comparing DES code on the 80x86 to the 'C26 instruction set, I think the speeds would probably be about the same. Whatever, these speeds leave plenty of time for simple speech coding in a voice encryption system. --------------------------------------------------------------------- John A. Thomas | (214) 263-4351 | jathomas@netcom.com Bowles & Thomas, L.L.P. | Voice | CompuServe 75236,3536 410 N.W Eleventh St. | (214) 262-6520 | Grand Prairie, Tx 75050 | Fax | PGP public key available ---------------------------------------------------------------------