The speaker introduces the I2P network, an overlay network that provides fully anonymous and confidential messaging that runs on top of the existing internet infrastructure. The speaker is a maintainer of the JavaScript TypeScript library for I2P, which enables developers to write privacy by design applications. The talk includes examples of using the library for reading and writing data on the I2P network, and the speaker also talks briefly about the use cases for I2P, including free banking technology and chat applications. There is also a Q&A section where the speaker answers questions about the low latency of the network and the comparison with other peer-to-peer networks.