Brute force, get AES keys by multiple plain-texts with their cipher-texts I know that the encryption is AES, and I have multiple plain-texts with their cipher-texts, I don't know the encryption mode (ECB, CFB, etc ...) actually, but I know that the keys and the IV Key (if it's used) are static not changeable.


  How can I get the keys, or is there are a way to encrypt a text with the same key, so I can get the cipher-text of any plain-text I want ? Is there any tool or service can I pay to do that ?
No. You are talking about a known plaintext attack against AES. There is no known attack, discovery of such an attack would be invaluable to there likes of MI6, FSB, and the NSA.