Hey, I downloaded the crypto lib 'cryptl99.zip' from one of the crypto web sites, I got IDEA.C to compile, but it doesn't seem to encrypt. The test code that comes with it shows the sub-key groupings, then it does this X 0 1 2 3 4 5 6 7 Y 0 1 2 3 4 5 6 7 Z 0 1 2 3 4 5 6 7 It looks like X should be the plaintext, Y the ciphertext, then Z the plaintext again from the code, but it isn't working. If anyone knows the source code I am talking about let me know what is wrong. Here is what the main piece looks like: printf("\n Encrypting %d bytes (%ld blocks)...", BLOCKS*16, BLOCKS); fflush(stdout); start = clock(); memcpy(YY, XX, 8); for (l = 0; l < BLOCKS; l++) ideaCipher(YY, YY, EK); /* repeated encryption */ memcpy(ZZ, YY, 8); for (l = 0; l < BLOCKS; l++) ideaCipher(ZZ, ZZ, DK); /* repeated decryption */ end = clock() - start; l = end / (CLOCKS_PER_SEC/1000) + 1; i = l/1000; j = l%1000; l = 4; // (16 * BLOCKS * (CLOCKS_PER_SEC/1000)) / (end/1000); printf("%d.%03d seconds = %ld bytes per second\n", i, j, l); printf("\nX %3u %3u %3u %3u %3u %3u %3u %3u\n", XX[0], XX[1], XX[2], XX[3], XX[4], XX[5], XX[6], XX[7]); printf("\nY %3u %3u %3u %3u %3u %3u %3u %3u\n", YY[0], YY[1], YY[2], YY[3], YY[4], YY[5], YY[6], YY[7]); printf("\nZ %3u %3u %3u %3u %3u %3u %3u %3u\n", ZZ[0], ZZ[1], ZZ[2], ZZ[3], ZZ[4], ZZ[5], ZZ[6], ZZ[7]); from this, Y should be encrypted, but it isn't! Thanks in advance for any help. -- thecrow@iconn.net "It can't rain all the time"