The paper analyzes the problems of ensuring information security in open multi-agent systems that use access control schemes based on RSA algorithms. It is shown that when using such schemes, a significant part of the agents ‘ lifetime is spent on authentication processes. To increase the efficiency of multi-agent systems by reducing the number of agent authentication processes, a method of access differentiation based on Goppa codes is justified and proposed. For the proposed methodology, an assessment of the level of security of agent information is given