Jul 20, 2020 · I suspect AES/ECB will be as good as AES/CBC in this case... For plaintexts shorter than the cipher block size (i.e. 16 bytes for AES), CBC mode encryption is equivalent to: padding the plaintext up to 16 bytes, XORing the padded plaintext with a random 16-byte IV, encrypting the resulting 16-byte block with raw AES (i.e. in "ECB mode"), and

In a project that I'm currently working on, we are encrypting some data using AES with ECB mode in a database. Each piece of data being encrypted is very small, no more than 10 characters long. Very importantly , each entry of that database is encrypted using a different and unique key.

Jul 23, 2018 · ECB used to encrypt 128 bit blocks is the same as directly using the block cipher. AES can be used in many ways, it depends on what it is used for to see if it is secure. Using AES in ECB mode to encrypt random data (such as symmetric key material) to keep it confidential can be secure. Using AES ECB on many blocks representing a counter is a ...

Nov 2, 2015 · For example, if you were trying to break AES-256 using just one block (i.e. 128 bits) of known plaintext (and somehow had a magic supercomputer that could actually test 2 256 keys by brute force), you'd end up with about 2 128 false positives — wrong keys that produce the correct ciphertext for the known plaintext block just by chance — in ...

Nov 1, 2018 · ECB mode is insecure (except maybe in some very specific use cases). That being said since you are only encrypting less than 1 block, and you are just doing it to try to learn AES, you shouldn't even really be concerned with a mode-of-encryption at this point. Just focus on AES running on a single block.

Jan 10, 2017 · Attacks on AES-128 (ECB) based on some knowledge of plaintext. 2. What is more secure, a ciphertext ...

That use of AES can be named ECB if the various blocks are grouped together in some defined order. However beware that it does next to nothing for integrity. In particular, ciphertexts can be replayed; shuffling the ciphertexts will shuffle the plaintexts the same way; and a random ciphertext will decipher to an apparently random plaintext.

Dec 27, 2014 · Specifically, the problem with ECB mode is that encrypting the same block (of 8 or 16 bytes, or however large the block size of the underlying cipher is) of plaintext using ECB mode always yields the same block of ciphertext. This can allow an attacker to: detect whether two ECB-encrypted messages are identical;

[1] - For a single block, AES ECB is a secure MAC. [2] - AES ECB encryption for a single block suffers from one of the problems that AES ECB suffers from in general, namely that it is deterministic. The same message encrypted with the same key results in the same ciphertext. How big of an issue is that for your application?

Sep 4, 2016 · What are the pros/cons of using AES ECB mode to encrypt encryption keys (data encryption keys or DEKs)? Aware of the significant weaknesses when it come to encrypting low-entropy data that's greater than a block size and also aware of AES Key wrapping functions . The low efficiency of AES KW in high throughput cases is an issue in our case ...