US Patent 10146961 Encrypting replication journals in a storage system

Described embodiments provide systems and methods for encrypting journal data of a storage system. At least one key is generated, each key having an associated key identifier. The at least one key and the associated key identifiers are stored to a key store. User data is read from a replica volume of the storage system. The read user data is encrypted with an associated key. Encrypted data is written to a journal associated with the replica volume. The key identifier of the associated key is written to the journal.