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(*):

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

Decrypted:

ECB
3 5 0 3 1 9 5 f f c 7 4 6 f e 4
0 7 e d 9 2 b 9 4 1 1 4 5 9 1 b
d 8 d 0 d 8 d 0 4 b 9 c 7 4 e 6
8 a 2 f b d 9 a f 4 9 6 5 b 6 4
0 5 e 6 f f 5 6 0 f 2 a 8 4 e 1
1 a 8 9 f a a e c d e 3 0 5 2 9
b 3 3 4 b 9 7 7 6 f 9 9 d a 0 f
a 9 2 7 1 3 8 5 8 2 c 6 a 5 e 1
CBC
3 5 0 3 1 9 5 f f c 7 4 6 f e 4
0 7 e d 9 2 b 9 4 1 1 4 5 9 1 b
d 8 d 0 d 8 d 0 4 b 9 c 7 4 e 6
8 a 2 f b d 9 a f 4 9 6 5 b 6 4
0 5 e 6 f f 5 6 0 f 2 a 8 4 e 1
1 a 8 9 f a a e c d e 3 0 5 2 9
b 3 3 4 b 9 7 7 6 f 9 9 d a 0 f
a 9 2 7 1 3 8 5 8 2 c 6 a 5 e 1
OFB
0 0 1 1 0 1 0 1 0 0 0 0 0 0 1 1
0 0 0 1 1 0 0 1 0 1 0 1 1 1 1 1
1 1 1 1 1 1 0 0 0 1 1 1 0 1 0 0
0 1 1 0 1 1 1 1 1 1 1 0 0 1 0 0
0 0 0 0 0 1 1 1 1 1 1 0 1 1 0 1
1 0 0 1 0 0 1 0 1 0 1 1 1 0 0 1
0 1 0 0 0 0 0 1 0 0 0 1 0 1 0 0
0 1 0 1 1 0 0 1 0 0 0 1 1 0 1 1
1 1 0 1 1 0 0 0 1 1 0 1 0 0 0 0
1 1 0 1 1 0 0 0 1 1 0 1 0 0 0 0
0 1 0 0 1 0 1 1 1 0 0 1 1 1 0 0
0 1 1 1 0 1 0 0 1 1 1 0 0 1 1 0
1 0 0 0 1 0 1 0 0 0 1 0 1 1 1 1
1 0 1 1 1 1 0 1 1 0 0 1 1 0 1 0
1 1 1 1 0 1 0 0 1 0 0 1 0 1 1 0
0 1 0 1 1 0 1 1 0 1 1 0 0 1 0 0
0 0 0 0 0 1 0 1 1 1 1 0 0 1 1 0
1 1 1 1 1 1 1 1 0 1 0 1 0 1 1 0
0 0 0 0 1 1 1 1 0 0 1 0 1 0 1 0
1 0 0 0 0 1 0 0 1 1 1 0 0 0 0 1
0 0 0 1 1 0 1 0 1 0 0 0 1 0 0 1
1 1 1 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 0 1 1 0 1 1 1 1 0 0 0 1 1
0 0 0 0 0 1 0 1 0 0 1 0 1 0 0 1
1 0 1 1 0 0 1 1 0 0 1 1 0 1 0 0
1 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1
0 1 1 0 1 1 1 1 1 0 0 1 1 0 0 1
1 1 0 1 1 0 1 0 0 0 0 0 1 1 1 1
1 0 1 0 1 0 0 1 0 0 1 0 0 1 1 1
0 0 0 1 0 0 1 1 1 0 0 0 0 1 0 1
1 0 0 0 0 0 1 0 1 1 0 0 0 1 1 0
1 0 1 0 0 1 0 1 1 1 1 0 0 0 0 1
CFB
3 5 0 3 1 9 5 f f c 7 4 6 f e 4
0 7 e d 9 2 b 9 4 1 1 4 5 9 1 b
d 8 d 0 d 8 d 0 4 b 9 c 7 4 e 6
8 a 2 f b d 9 a f 4 9 6 5 b 6 4
0 5 e 6 f f 5 6 0 f 2 a 8 4 e 1
1 a 8 9 f a a e c d e 3 0 5 2 9
b 3 3 4 b 9 7 7 6 f 9 9 d a 0 f
a 9 2 7 1 3 8 5 8 2 c 6 a 5 e 1
CTR
0 0 1 1 0 1 0 1 0 0 0 0 0 0 1 1
0 0 0 1 1 0 0 1 0 1 0 1 1 1 1 1
1 1 1 1 1 1 0 0 0 1 1 1 0 1 0 0
0 1 1 0 1 1 1 1 1 1 1 0 0 1 0 0
0 0 0 0 0 1 1 1 1 1 1 0 1 1 0 1
1 0 0 1 0 0 1 0 1 0 1 1 1 0 0 1
0 1 0 0 0 0 0 1 0 0 0 1 0 1 0 0
0 1 0 1 1 0 0 1 0 0 0 1 1 0 1 1
1 1 0 1 1 0 0 0 1 1 0 1 0 0 0 0
1 1 0 1 1 0 0 0 1 1 0 1 0 0 0 0
0 1 0 0 1 0 1 1 1 0 0 1 1 1 0 0
0 1 1 1 0 1 0 0 1 1 1 0 0 1 1 0
1 0 0 0 1 0 1 0 0 0 1 0 1 1 1 1
1 0 1 1 1 1 0 1 1 0 0 1 1 0 1 0
1 1 1 1 0 1 0 0 1 0 0 1 0 1 1 0
0 1 0 1 1 0 1 1 0 1 1 0 0 1 0 0
0 0 0 0 0 1 0 1 1 1 1 0 0 1 1 0
1 1 1 1 1 1 1 1 0 1 0 1 0 1 1 0
0 0 0 0 1 1 1 1 0 0 1 0 1 0 1 0
1 0 0 0 0 1 0 0 1 1 1 0 0 0 0 1
0 0 0 1 1 0 1 0 1 0 0 0 1 0 0 1
1 1 1 1 1 0 1 0 1 0 1 0 1 1 1 0
1 1 0 0 1 1 0 1 1 1 1 0 0 0 1 1
0 0 0 0 0 1 0 1 0 0 1 0 1 0 0 1
1 0 1 1 0 0 1 1 0 0 1 1 0 1 0 0
1 0 1 1 1 0 0 1 0 1 1 1 0 1 1 1
0 1 1 0 1 1 1 1 1 0 0 1 1 0 0 1
1 1 0 1 1 0 1 0 0 0 0 0 1 1 1 1
1 0 1 0 1 0 0 1 0 0 1 0 0 1 1 1
0 0 0 1 0 0 1 1 1 0 0 0 0 1 0 1
1 0 0 0 0 0 1 0 1 1 0 0 0 1 1 0
1 0 1 0 0 1 0 1 1 1 1 0 0 0 0 1
(*) 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.