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(*):

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

Decrypted:

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