critically compare the following:

1. Ciphertext Only Attack model (COA) and Chosen Plaintext Attack model (CPA)
2. Classic Cryptanalytic attack and Implementation attack

Your response should be no more than words in length and should include the following information:

1. Critical comparison of the two attack models and attack types by highlighting the core difference between them (e.g., the complexity of the attack, relevant application or usage, examples, relative strengths, and weaknesses etc)
2. You may use illustrations to support your discussion, where appropriate and if the illustrations are not yours, please cite their sources appropriately.
3. You should substantiate your discussion with valid references from within the module material and/or external sources.