CryptICS

Below is a randomly generated ciphertext(*), each block representing 128 bits. Click on any portion to introduce errors. Below, you can see how the error propagates through decryption with different block cipher modes.

Ciphertext(*):

d 4 c 0 d 7 1 e 9 7 9 7 6 2 7 f f 6 a 7 5 c a 8 5 c d d a 0 7 f
9 f 2 d 4 c 7 9 e 6 b 1 6 8 0 3 0 d 8 9 8 3 6 a 8 e c 8 1 0 d 9
6 c 9 8 a f 3 9 d 5 3 f a d 2 b 0 a f 2 e 6 7 0 9 f e 2 0 8 d 7
7 b 6 5 d 9 d 1 8 b a f 9 a 5 c 5 a 1 f 2 8 9 4 b d 6 5 c 8 a 5

Decrypted:

ECB
f d 8 f a 8 1 5 6 6 1 7 2 0 4 7
e 8 9 8 b a 2 e 8 9 2 1 d 4 b 6
7 d 2 6 5 3 6 3 0 6 f 9 4 e 4 d
7 3 b 1 6 f 3 7 e 6 f 8 9 7 b 5
3 4 c 5 8 5 8 f 7 9 7 9 0 5 3 4
e 7 d 8 4 0 6 3 b b 1 0 e 4 2 f
d 8 b 1 9 2 8 e e b c 3 d 1 3 6
4 0 7 3 c 3 c 1 9 2 2 6 2 8 3 4
CBC
f d 8 f a 8 1 5 6 6 1 7 2 0 4 7
e 8 9 8 b a 2 e 8 9 2 1 d 4 b 6
7 d 2 6 5 3 6 3 0 6 f 9 4 e 4 d
7 3 b 1 6 f 3 7 e 6 f 8 9 7 b 5
3 4 c 5 8 5 8 f 7 9 7 9 0 5 3 4
e 7 d 8 4 0 6 3 b b 1 0 e 4 2 f
d 8 b 1 9 2 8 e e b c 3 d 1 3 6
4 0 7 3 c 3 c 1 9 2 2 6 2 8 3 4
OFB
1 1 1 1 1 1 0 1 1 0 0 0 1 1 1 1
1 0 1 0 1 0 0 0 0 0 0 1 0 1 0 1
0 1 1 0 0 1 1 0 0 0 0 1 0 1 1 1
0 0 1 0 0 0 0 0 0 1 0 0 0 1 1 1
1 1 1 0 1 0 0 0 1 0 0 1 1 0 0 0
1 0 1 1 1 0 1 0 0 0 1 0 1 1 1 0
1 0 0 0 1 0 0 1 0 0 1 0 0 0 0 1
1 1 0 1 0 1 0 0 1 0 1 1 0 1 1 0
0 1 1 1 1 1 0 1 0 0 1 0 0 1 1 0
0 1 0 1 0 0 1 1 0 1 1 0 0 0 1 1
0 0 0 0 0 1 1 0 1 1 1 1 1 0 0 1
0 1 0 0 1 1 1 0 0 1 0 0 1 1 0 1
0 1 1 1 0 0 1 1 1 0 1 1 0 0 0 1
0 1 1 0 1 1 1 1 0 0 1 1 0 1 1 1
1 1 1 0 0 1 1 0 1 1 1 1 1 0 0 0
1 0 0 1 0 1 1 1 1 0 1 1 0 1 0 1
0 0 1 1 0 1 0 0 1 1 0 0 0 1 0 1
1 0 0 0 0 1 0 1 1 0 0 0 1 1 1 1
0 1 1 1 1 0 0 1 0 1 1 1 1 0 0 1
0 0 0 0 0 1 0 1 0 0 1 1 0 1 0 0
1 1 1 0 0 1 1 1 1 1 0 1 1 0 0 0
0 1 0 0 0 0 0 0 0 1 1 0 0 0 1 1
1 0 1 1 1 0 1 1 0 0 0 1 0 0 0 0
1 1 1 0 0 1 0 0 0 0 1 0 1 1 1 1
1 1 0 1 1 0 0 0 1 0 1 1 0 0 0 1
1 0 0 1 0 0 1 0 1 0 0 0 1 1 1 0
1 1 1 0 1 0 1 1 1 1 0 0 0 0 1 1
1 1 0 1 0 0 0 1 0 0 1 1 0 1 1 0
0 1 0 0 0 0 0 0 0 1 1 1 0 0 1 1
1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 1
1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0
0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0
CFB
f d 8 f a 8 1 5 6 6 1 7 2 0 4 7
e 8 9 8 b a 2 e 8 9 2 1 d 4 b 6
7 d 2 6 5 3 6 3 0 6 f 9 4 e 4 d
7 3 b 1 6 f 3 7 e 6 f 8 9 7 b 5
3 4 c 5 8 5 8 f 7 9 7 9 0 5 3 4
e 7 d 8 4 0 6 3 b b 1 0 e 4 2 f
d 8 b 1 9 2 8 e e b c 3 d 1 3 6
4 0 7 3 c 3 c 1 9 2 2 6 2 8 3 4
CTR
1 1 1 1 1 1 0 1 1 0 0 0 1 1 1 1
1 0 1 0 1 0 0 0 0 0 0 1 0 1 0 1
0 1 1 0 0 1 1 0 0 0 0 1 0 1 1 1
0 0 1 0 0 0 0 0 0 1 0 0 0 1 1 1
1 1 1 0 1 0 0 0 1 0 0 1 1 0 0 0
1 0 1 1 1 0 1 0 0 0 1 0 1 1 1 0
1 0 0 0 1 0 0 1 0 0 1 0 0 0 0 1
1 1 0 1 0 1 0 0 1 0 1 1 0 1 1 0
0 1 1 1 1 1 0 1 0 0 1 0 0 1 1 0
0 1 0 1 0 0 1 1 0 1 1 0 0 0 1 1
0 0 0 0 0 1 1 0 1 1 1 1 1 0 0 1
0 1 0 0 1 1 1 0 0 1 0 0 1 1 0 1
0 1 1 1 0 0 1 1 1 0 1 1 0 0 0 1
0 1 1 0 1 1 1 1 0 0 1 1 0 1 1 1
1 1 1 0 0 1 1 0 1 1 1 1 1 0 0 0
1 0 0 1 0 1 1 1 1 0 1 1 0 1 0 1
0 0 1 1 0 1 0 0 1 1 0 0 0 1 0 1
1 0 0 0 0 1 0 1 1 0 0 0 1 1 1 1
0 1 1 1 1 0 0 1 0 1 1 1 1 0 0 1
0 0 0 0 0 1 0 1 0 0 1 1 0 1 0 0
1 1 1 0 0 1 1 1 1 1 0 1 1 0 0 0
0 1 0 0 0 0 0 0 0 1 1 0 0 0 1 1
1 0 1 1 1 0 1 1 0 0 0 1 0 0 0 0
1 1 1 0 0 1 0 0 0 0 1 0 1 1 1 1
1 1 0 1 1 0 0 0 1 0 1 1 0 0 0 1
1 0 0 1 0 0 1 0 1 0 0 0 1 1 1 0
1 1 1 0 1 0 1 1 1 1 0 0 0 0 1 1
1 1 0 1 0 0 0 1 0 0 1 1 0 1 1 0
0 1 0 0 0 0 0 0 0 1 1 1 0 0 1 1
1 1 0 0 0 0 1 1 1 1 0 0 0 0 0 1
1 0 0 1 0 0 1 0 0 0 1 0 0 1 1 0
0 0 1 0 1 0 0 0 0 0 1 1 0 1 0 0
(*) In the background, the same cleartext is encrypted and decrypted with each mode, the visible ciphertext is created using AES128-CBC and acts as a stand-in. Clicking a hex number will always flip the last bit of the 4 bits it represents in each ciphertext.