preventing unauthorized access. These frameworks used to ensure secure and authenticated financial transactions, among other things. Your manager has asked to provide a details search about the following point in order to use it in your tasks: 9- Investigate the Public Key Infrastructure (PKI), its use, and the PKI framework components using example. 10- Examine the security of hybrid ciphers and explore the creation of Key Encapsulation Mechanisms critically (KEMs). 11- Measure the DES and 3DES encryption standards, with public key and private key encryption and assess the improvement produced by AES compared to them. 12-Assess provable security in different explanations in cryptography in the real world