ECB cipher mode in AESEncryption doesn’t provide serious message confidentiality. #3324
Description
Describe the bug
Encryption operations should use a secure mode and padding scheme so that confidentiality and integrity can be guaranteed.
Existing AESEncryption.java is using ECB (Electronic Codebook) cipher mode.
The ECB cipher mode doesn’t provide serious message confidentiality: under a given key any given plaintext block always gets encrypted to the same ciphertext block. This mode never be used.
Expected behavior
The GCM (Galois Counter Mode) mode which works internally with zero/no padding scheme, is recommended, as it is designed to provide both data authenticity (integrity) and confidentiality.