Newsgroup: it.comp.sicurezza.crittografia
Titolo: Identificazione algoritmo (simile a rc4 ma non lo e')

Ho bisogno di sapere quale (se e' standard) algoritmo genera questa tabella:
ad occhio sembra rc4 ma non lo e'...
la chiave e':
unsigned char key[16] = { 0xF0, 0x14, 0x55, 0x0D, 0x5E, 0xDA, 0x92, 0xB3, 
0xA7, 0x6C, 0xCE, 0x84, 0x90, 0xBC, 0x7F, 0xED };
la tabella che viene generata e' di 256 bytes ed e':
unsigned char table[256] = { 0x6B, 0xFA, 0x96, 0x32, 0x19, 0x00, 0x8E, 0x88,
                              0x25, 0x91, 0x77, 0x08, 0x0E, 0xD4, 0x17, 
0x5D,
                              0xA2, 0x69, 0x39, 0xAE, 0x31, 0x04, 0xD0, 
0xD2,
                              0xAD, 0x11, 0x0D, 0x26, 0xFF, 0x43, 0x1C, 
0x41,
                              0x3C, 0xB6, 0x89, 0xFE, 0x15, 0xC9, 0x24, 
0x4D,
                              0xE8, 0xD3, 0xF8, 0x14, 0x4C, 0x2E, 0x50, 
0x52,
                              0x7A, 0x70, 0x81, 0xD7, 0xEB, 0xF7, 0x51, 
0x6D,
                              0xB2, 0xE1, 0x3E, 0xCA, 0x0F, 0xB3, 0x0B, 
0x98,
                              0xF2, 0x57, 0xDC, 0xBC, 0x45, 0x42, 0xCF, 
0x27,
                              0xA3, 0x1F, 0x22, 0x64, 0xA6, 0x05, 0xE9, 
0xC2,
                              0x86, 0x16, 0xBD, 0x8A, 0x85, 0xF1, 0x58, 
0xC5,
                              0x47, 0xC8, 0x48, 0x9A, 0x10, 0xB4, 0xD8, 
0xBB,
                              0xE3, 0xDD, 0xCD, 0xB9, 0x65, 0x21, 0x37, 
0xB7,
                              0xA4, 0xE7, 0x06, 0x7C, 0xBA, 0xE2, 0xB1, 
0xC1,
                              0xE4, 0x36, 0xE6, 0x9E, 0x68, 0x6E, 0xF6, 
0x4F,
                              0x93, 0x0C, 0x23, 0x18, 0xA5, 0x83, 0xF5, 
0xF9,
                              0x97, 0x2D, 0x3F, 0x1A, 0x09, 0xEA, 0x3D, 
0xA8,
                              0x1B, 0xA1, 0xC7, 0xC0, 0x35, 0x4A, 0xAB, 
0x6C,
                              0x5F, 0xBE, 0x3A, 0x07, 0x1D, 0x7E, 0x87, 
0x95,
                              0x49, 0x56, 0x2B, 0xCC, 0x7B, 0x78, 0x55, 
0x01,
                              0x20, 0x5E, 0xEC, 0x28, 0xBF, 0x12, 0xB0, 
0x5B,
                              0x3B, 0xA9, 0x29, 0x44, 0x2C, 0xE5, 0xDA, 
0x34,
                              0x7F, 0x1E, 0xFB, 0xD6, 0xDB, 0x60, 0x8D, 
0x72,
                              0xCB, 0x76, 0x4B, 0x40, 0x8B, 0x2A, 0x66, 
0x73,
                              0xFD, 0x9C, 0x30, 0x02, 0x9B, 0x80, 0xD9, 
0xF3,
                              0x59, 0x4E, 0x99, 0x38, 0x74, 0x94, 0xDE, 
0xAA,
                              0x2F, 0xFC, 0xC3, 0xE0, 0xF4, 0x92, 0x67, 
0x5C,
                              0xA7, 0x46, 0x82, 0x8F, 0x6F, 0xB8, 0x61, 
0xCE,
                              0xD1, 0xDF, 0x62, 0xA0, 0x75, 0x6A, 0xB5, 
0xED,
                              0x90, 0x9D, 0x7D, 0xC6, 0x33, 0x54, 0x03, 
0xEF,
                              0xEE, 0x71, 0xAF, 0x84, 0x79, 0xC4, 0x63, 
0x9F,
                              0xAC, 0x8C, 0xD5, 0x5A, 0x0A, 0x53, 0x13, 
0xF0 };
come si puo' notare, la fine della tabella (letta dalla fine verso l'inizio) 
e' simile alla chiave..
avete idea di cosa sia?
e' qualcosa di noto o procedo nel reversing?

nella generazione della tabella nell'rc4 il codice e':
    for (i = 0; i < 256; i++)
        TABLE[i] = i;
    for (i = j = 0; i < 256; i++) {
        j = (j + key[i % key_length] + TABLE[i]) & 255;
        swap(TABLE, i, j);
    }
nel mio caso il codice e' simile cioe' nel codice vedo:
    for (i = 0; i < 256; i++)
        TABLE[i] = i;
    for (i = j = 0; i < 256; i++) {
        j = [altro algoritmo];
        swap(TABLE, i, j);
    }
vorrei capire prima di procedere se per caso e' un algoritmo noto o dove 
continuare il reverse ;)