Electronic Code Book (ECB) is a mode of operation for a block cipher, with the characteristic that each possible block of plaintext has a defined corresponding ciphertext value and vice versa.
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3answers
102 views
how much is secure to encrypt a password using itself (as encryption key) for storing it on a unsecure media?
I want to store a password securely on a storage (suppose in a usual unencrypted file).
I use this password as AES key to encrypt itself (using AES-ECB) & then store it on the media (the password ...
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0answers
64 views
Known-plaintext attack on Blowfish in ECB mode
The protection scheme I faced recently seems so weak nowadays that a simple exhaustive key search would be enough to recover the user key in an acceptable amount of time (it's OK, since almost no ...
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1answer
178 views
Multi layer encryption with ECB mode [closed]
if i use the 2 of the same key with 2 of the same algoritm when encrypting in ECB like when i have 2 blocks of the same color and i encrypt the 2 blocks with the same color the cipher text should
not ...
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1answer
62 views
What is the usual block cipher mode that goes with CTS
I am just wondering what is the most common, or most used, block cipher mode used to goes with CTS?
ECB or CBC?
1
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1answer
160 views
Use of CBC-AES-256 to encrypt usernames
I came across some code in our project that encrypts usernames (limited to 50 chars, most are less than 10) using the following parameters:
IV size is 16 bytes
Key size is 32 bytes
Algorithm is ...
3
votes
3answers
325 views
Relative merits of AES ECB and CBC modes for securing data at rest
I need to store several million Payment Card Numbers (PCNs) securely in a mainframe database (that is, 'at rest'). I assume that any attacker will have access to all of the stored data.
I assume the ...
2
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2answers
432 views
Is it possible to obtain AES-128 key from a known ciphertext-plaintext pair?
I have a file, which was encrypted with AES-128 in ECB mode. I know the format of the original file and know that all files in this format have the same headers. So, I have an encrypted block and the ...
2
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1answer
252 views
Shortcuts / practicality of brute forcing block cipher (AES) + ECB with known plaintext
I know the plaintext (26 bytes long) and cryptotext of block cipher (suspected to be AES) in ECB mode. I can generate hundreds or thousands of such samples, but the samples are not arbitrary. What are ...
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1answer
116 views
Why does .NET's ECB mode implementation append a constant block to my ciphertext?
Consider the following code and output:
...
3
votes
1answer
120 views
Encrypt array of int for individual retrieval
I have limited exposure to cryptographic terminology, so please bear with me.
My end goal is to encrypt integer IDs, before transmitting them to a web client in a list of search results, in a way ...
1
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2answers
563 views
Replay attack in ECB mode
How do replay attacks work in ECB mode?
I found this in Wikipedia:
"ECB mode can also make protocols without integrity protection even more susceptible to replay attacks, since each block gets ...
2
votes
2answers
297 views
Capacity of Advanced Encryption Standard in terms of File Encryption
what is the capacity of AES in terms of File Encryption?
is it really good to encrypt a large files in AES? ex. I am encrypting a 8GB of File... is it still good to used AES?
is it still good to used ...
3
votes
2answers
227 views
Is ECB mode secure if plaintexts guaranteed to be unique?
I've got a scenario where I need to encrypt many small (16-byte) plaintexts. I want to use AES-128 in ECB mode. Notably, each plaintext is guaranteed to be unique, though each may differ by only a few ...
1
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3answers
433 views
Which attacks can be avoided by the use of OFB instead of ECB?
For a file encryption program, I was told to use Output Feedback mode (OFB) instead of ECB (Electronic code book) mode.
Which attacks can I avoid by this choice?
1
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2answers
239 views
Complexity of ECB and OFB
What is the complexity of ECB in terms of Time and Memory?
and also in OFB? I can't find it in the internet, so I decided to ask it in here.
10
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4answers
4k views
Should I use ECB or CBC encryption mode for my block cipher?
Can someone tell me which mode out of ECB and CBC is better, and how to decide which mode to use? Are there any other modes which are better?
