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p : 3946183951 A : 537680305 B : 1059676324 G E : [ 1152222263 3133703258 ]

CONTOH PERHITUNGAN. ENKRIPSI. p : 3946183951 A : 537680305 B : 1059676324 G E : [ 1152222263 3133703258 ] N G : 3946206427 ε : 100 : [ 3539395206 1802765602 ] Plaintext : Mat. Kunci 32 bit. lpesan  Panjang pesan = 3 (b anyaknya karakter plaintext )

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p : 3946183951 A : 537680305 B : 1059676324 G E : [ 1152222263 3133703258 ]

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  1. CONTOH PERHITUNGAN ENKRIPSI p : 3946183951 A : 537680305 B : 1059676324 GE : [1152222263 3133703258] NG : 3946206427 ε: 100 : [3539395206 1802765602] Plaintext : Mat Kunci 32 bit lpesan Panjang pesan = 3 (banyaknya karakter plaintext) bpesan  ceil ( (32/8) – 1 ) = 3 (dipotong setiap 3 karakter) ipesan  ceil (lpesan / bpesan) = 3/3 = 1 (pemotongan pesan)

  2. pesan: Mat ASCII Biner Biner 8 bit 1001101 01001101 M 77 ASCII Biner Biner 8 bit 1100001 01100001 a 97 ASCII Biner Biner 8 bit 1110101 01110100 t 116 Desimal 5071220 m

  3. pesan: Mat m = 5071220 xj = m. ε + j , j [0, ε-1]  Sj = xj3 + A.xj + B (mod p) yj = akar dari Sj PM = (xj , yj) x0 = 5071220(100)+0 = 507122000  S0 = 211020104 y0 = akar S0 =Tdk memiliki akar. S0(p-1)/2 = -1(mod p) x1 = 5071220(100)+1 = 507122001  S1 =3164013225 y1 = akar S1 =Tdk memiliki akar. S1(p-1)/2 = -1(mod p) x2 = 5071220(100)+2 = 507122002  S2 =1267370450 y2 = akar S2 =Tdk memiliki akar. S2(p-1)/2 = -1(mod p) x3 = 5071220(100)+3 = 507122003  S3 = 2413459687 y3 = akar S3 = 3301895794 dan 644288157 Titiknya  (507122003 , 3301895794) dan (507122003 , 644288157) ………… sampai j=ε-1=99. Dipilih 1 titik ( PM )  ( 507122095 , 1075291432) Dipilih j [0,ε-1] = [0, 99]  j = 95 x95 =5071220(100)+82=507122003 S95 =375659790 y95 = akar S95 = 1075291432 dan 2870892519 Titiknya  (507122095 , 1075291432) dan (507122095 , 2870892519) Dipilih 1 titik ( PM )  ( 507122095 , 1075291432)

  4. pesan: Mat m = 5071220 PM = ( 507122082 , 307629979 ) ENKRIPSI ElGamal ECC k [1, NG – 1] = [1,3946206426]  912120288 P1 = k.GE = (3227285189 , 2965666882) P2 = PM + k. = PM + (736261778 , 2068514041) = (3828826938 , 1504649631) PC = (P1,P2) = ((3227285189, 2965666882),(3828826398,1504649631)) PC= ( 3227285189 2965666882 3828826398 1504649631 )

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