Abstract: A system includes processor(s) and memory(s). When encryption key(s) need to be generated to encrypt a key, processor(s): generate encryption key(s); encrypt key using encryption key(s) to generate encrypted key; split encrypted key and encryption key(s) into set(s) of key components, wherein subset of key components can be used to reconstruct encrypted key and encryption key(s); and erase key from memory(s). When encryption key(s) need to be used, processor(s): receive set(s) of key components from subset(s) of users that can be used to reconstruct encrypted key and encryption key(s) used to decrypt key from encrypted key; when set(s) of key components is received from subset(s) of users that can be used to reconstruct encrypted key and encrypted key(s), reconstruct encrypted key and encryption key(s); and when the encrypted key and the encryption key(s) have both been reconstructed, decrypt encrypted key into key using encryption key(s).

Abstract: A computing system that includes at least one processor and at least one memory communicatively coupled to the at least one processor is disclosed. The computing system also includes at least one network interface communicatively coupled to the at least one processor and configured to communicate with at least one vault system, each of the at least one vault system storing a respective one of N private keys or key components associated with a customer. The at least one processor is configured to generate, at the customer device, a sweeping transaction that transfers all funds from at least one input transaction address in a customer wallet to a new transaction address. The at least one processor is also configured to sign the sweeping transaction using at least M of N private keys or key components.

Abstract: A computing system that includes at least one processor and at least one memory communicatively coupled to the at least one processor is disclosed. The computing system also includes at least one network interface communicatively coupled to the at least one processor and configured to communicate with at least one vault system, each of the at least one vault system storing a respective one of N private keys or key components associated with a customer. The at least one processor is configured to receive, from each of at least one vault system, a respective private key or key component. The at least one processor is also configured to perform at least one action based on at least M of the N private keys or key components.

Abstract: A system includes processor(s) and memory(s). When encryption key(s) need to be generated to encrypt a key, processor(s): generate encryption key(s); encrypt key using encryption key(s) to generate encrypted key; split encrypted key and encryption key(s) into set(s) of key components, wherein subset of key components can be used to reconstruct encrypted key and encryption key(s); and erase key from memory(s). When encryption key(s) need to be used, processor(s): receive set(s) of key components from subset(s) of users that can be used to reconstruct encrypted key and encryption key(s) used to decrypt key from encrypted key; when set(s) of key components is received from subset(s) of users that can be used to reconstruct encrypted key and encrypted key(s), reconstruct encrypted key and encryption key(s); and when the encrypted key and the encryption key(s) have both been reconstructed, decrypt encrypted key into key using encryption key(s).

Abstract: A system includes processor(s) and memory(s). When encryption key(s) need to be generated to encrypt a key, processor(s): securely generate encryption key(s); encrypt key using encryption key(s) to generate encrypted key; split encrypted key and encryption key(s) into set(s) of key components, wherein subset of key components can be used to reconstruct encrypted key and encryption key(s); and securely erase key from memory(s). When encryption key(s) need to be used, processor(s): receive set(s) of key components from subset(s) of users that can be used to reconstruct encrypted key and encryption key(s) used to securely decrypt key from encrypted key; when set(s) of key components is received from subset(s) of users that can be used to reconstruct encrypted key and encrypted key(s), securely reconstruct encrypted key and encryption key(s); and when the encrypted key and the encryption key(s) have both been reconstructed, securely decrypt encrypted key into key using encryption key(s).

Abstract: A system includes processor(s) and memory(s). When encryption key(s) need to be generated to encrypt a key, processor(s): securely generate encryption key(s); encrypt key using encryption key(s) to generate encrypted key; split encrypted key and encryption key(s) into set(s) of key components, wherein subset of key components can be used to reconstruct encrypted key and encryption key(s); and securely erase key from memory(s). When encryption key(s) need to be used, processor(s): receive set(s) of key components from subset(s) of users that can be used to reconstruct encrypted key and encryption key(s) used to securely decrypt key from encrypted key; when set(s) of key components is received from subset(s) of users that can be used to reconstruct encrypted key and encrypted key(s), securely reconstruct encrypted key and encryption key(s); and when the encrypted key and the encryption key(s) have both been reconstructed, securely decrypt encrypted key into key using encryption key(s).

Abstract: A computing system that includes at least one processor and at least one memory communicatively coupled to the at least one processor is disclosed. The computing system also includes at least one network interface communicatively coupled to the at least one processor and configured to communicate with at least one vault system, each of the at least one vault system storing a respective one of N private keys or key components associated with a customer. The at least one processor is configured to generate, at the customer device, a sweeping transaction that transfers all funds from at least one input transaction address in a customer wallet to a new transaction address. The at least one processor is also configured to sign the sweeping transaction using at least M of N private keys or key components.

Abstract: A computing system that includes at least one processor and at least one memory communicatively coupled to the at least one processor is disclosed. The computing system also includes at least one network interface communicatively coupled to the at least one processor and configured to communicate with at least one vault system, each of the at least one vault system storing a respective one of N private keys or key components associated with a customer. The at least one processor is configured to receive, from each of at least one vault system, a respective private key or key component. The at least one processor is also configured to perform at least one action based on at least M of the N private keys or key components.