This is a guest post by Jeff Ploughman, a Security Architect at T. Rowe Price and founder of the DC-Baltimore HashiCorp User Group; this work was done in his role as an Ethereum aficionado and open source contributor. HashiCorp Vault focuses on keeping application data secure across distributed infrastructure by tightly coupling your trusted identity with brokering access and managing sensitive organizational information and secrets. An Ethereum Wallet (add link) is a gateway to decentralized applications on the Ethereum blockchain. It allows you to hold and secure ether and other crypto-assets built on Ethereum, as well as deploy and use smart contracts. This blog will look at how the two can work seamlessly together.