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Secure key management for everyone
With Casa, you can have smooth, comfortable control of your bitcoin at your fingertips. It’s a great fit for Bitcoin beginners, high-net-worth individuals, and corporate treasuries alike and supported with white-glove customer service.
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Your personal key manager
At Casa, we help our clients hold their own private keys. Our Bitcoin wallet uses more than one private key to make your bitcoin more resilient to a wide variety of threats. This distributed model allows you to spread your security risk across individuals, devices, and locations. 
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Total ownership the way it should be
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Maintain proof of keys
Private keys are proof of Bitcoin ownership. You must have this key to produce a digital signature and spend your bitcoin, so your bitcoin is only as safe as your private key. With Casa, you’re always in control of your keys.
Robust protection, easy recovery
Bitcoin private key storage is about balancing security protection with the right amount of access. By using multiple keys, you’re protected from single points of failure, and we can help you replace a compromised key, whether it’s lost or stolen.
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Learn more about private keys
Interested in learning more about encryption? Watch a demo of public/private key pairs, get to know the do’s and don’ts of key management, and read about Casa’s quest as a personal key manager.
Download the Casa App
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Frequently asked questions.

What’s a Bitcoin private key?

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In today’s digital world, most of us are accustomed to using passwords to safeguard our accounts and valuable data. Private keys are similar to passwords, but much more robust. A Bitcoin private key is a string of random characters known as a 256-bit number. This number is so astronomically big that any attempt to forge or guess it would be a waste of time and resources, even with the world’s most powerful computers.

Why are private keys important?

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Bitcoin is a bearer asset. If you have the private key in your possession, the bitcoin is technically yours because you can spend it anytime, just like a gold bar or cash.Your private key is used to spend bitcoin, so it’s the root of your Bitcoin security protection. With a private key, you can generate a public key, which in turn can be used to generate Bitcoin addresses where you send and receive bitcoin. You could think of a private key as a “seed” from which public keys, addresses, and signatures are ultimately generated. In fact, Bitcoiners often use seed phrases, readable sequences of 12 or 24 words, to document their private key.