## 5 Discussion and Summary
\begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Paper** & **Problem** & **Method** & **Contribution** & **Weakness** \\ \hline
[50] & Problem of one hop cooperative packet forwarding due to noise a packet lost lost & Evolutionary game theory with dynamic strategy of cooperative & Guarantee the cooperation convergence by driving the ratio of cost-to-benefit threshold & Do not focus on any security issues and hence no mechanism for malicious \\ \hline
[51] & Dynamic trust cooperative under high malicious ratio & Evolutionary game-based trust cooperative simulation model & Convergence optimal strategy which maximize payoff and trust strategy preferential & Reliability issues in the packet delivery has not been tackled \\ \hline
[59] & Analysis of cooperative incentives & Integrated system of & Detection of selfish node and Effective & The security issues, attack or node that are \\  & Game theory & cooperative incentives & compromised has not been addressed \\ \hline
[33] & Regular and Malicious Node & Dynamic Bayesian & Formulation of Bayesian game framework to study the strategy of regular and malicious node & The game does not solve multi attack \\  & Strategy Analysis & Signaling Game & malicious node & collision of regular or malicious node \\ \hline
[24] & Security issues such as confidentiality and integrity in underwater & Cryptography method and Secure routing & Practical and efficient to confidentiality and integrity bin UASNs & It does not fully encourage cooperation in UASNs \\ \hline
[32] & Lack of centralized control and secure routing & Dynamic Bayesian & Formulate a two-player game and analyzed the Nash Equilibrium strategy & These is no any suitable mechanism for long running game to solve various attack issues \\ \hline
[72] & Preventing malicious attack and & Evolutionary game & Prevent nodes form attack and guarantee & These is no much impasses on cooperation issues \\  & Assuring trustworthiness & theoretic approach & trustworthiness of data & cooperation issues \\ \hline
[70] & Consumption of resources and & & Performance improvement in recourse & These is no motivation to \\  & selfish detection & Bayesian Game Method & consumption and effective security & cooperation enforcement \\ \hline
[71] & Trust evaluation and Trust decision issues & Trust Strategy based & Data retransmission after Packet, build a & No trust value calculation and trust \\  & in individual strategy adjustment & Evolutionary game model & trust strategy and strategy adjustment & management for security basis \\ \hline
[40] & Interaction for decision making and & Bayesian Game model with & Motivation to answer the request trust and and & No adequate solution to the selfish \\  & malicious behavior of entity & dynamic repeated type & promoting node to be honest \& cooperative & detection and therefore is not secured \\ \hline
[81] & Unknown malicious Selfish, nodes & Bayesian Game theory & Trustworthiness of unknown node evaluation & TP game is not a multi-player game and \\  & cooperative \& trustworthiness & model of TPP & and drive the equilibrium strategy of the game & hence cannot handle multiple payoff game \\ \hline  & Cooperation between different authorities & & Shov Cooperation can emerge underwater & \\  & to reduce energy consumption and & & & \\  & maximize lifetime & reactive \& non-reactive strategy & without incentives and highlight factors & Did not consider propagation in multipath \\  & & & & \\ \hline
[28] & Authentication problem for security issues & Digital signature scheme & Energy cost evaluation using digital signature & Lack of cooperation mechanism among the \\  & & scheme (end-to-end) authentication & participating node \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Summary of cooperative game methods in UASNs.