Anti-Forensics has newly raised as a domain of purposes, avoiding the determinations and aims of the domain of digital forensics. Unfortunately, Anti-forensics techniques and tools are becoming a terrible problem for digital forensic investigation and investigators. Therefore, new examination approaches must be conveyed to address this increasing problem. These techniques are developed by attackers to delete their digital traces from digital devices and compromise the digital investigation. Moreover, in this thesis, we proposed three solutions to defeat some of the anti-forensic tools and techniques such as data wiping. The first proposed solution is dealing with RAM live forensics by transforming the RAM data into logs by creating a new secured file system to save the RAM data on, to detect and save all attackers and users activities in a system. The second proposed solution is to avoid data wiping tools and techniques by using a USB fingerprint dongle with multi-factor authentication to secure the system from installing any data wiping tool. Finally, the third proposed solution is to preserve log files, by encrypting and authenticated logs locally and distributing them by a secure channel to multiple servers. Moreover, a set of security and performance tests were done to validate the efficiency and the robustness of the proposed solutions. On the other hand, the optimized OpenSSL implementation of AES with GMAC operation mode is developed in the third solution.