We’re overhauling Dgraph’s docs to make them clearer and more approachable. If you notice any issues during this transition or have suggestions, please let us know.
You might need to decrypt data from an encrypted Dgraph cluster for a variety of reasons, including:
  • Migration of data from an encrypted cluster to a non-encrypted cluster
  • Changing your data or schema by directly editing an RDF file or schema file
To support these scenarios, Dgraph includes a decrypt command that decrypts encrypted RDF and schema files. To learn how to export RDF and schema files from Dgraph, see export database. The decrypt command supports a variety of symmetric key lengths, which determine the AES cypher used for encryption and decryption, as follows:
Symmetric key lengthAES encryption cypher
128 bits (16-bytes)AES-128
192 bits (24-bytes)AES-192
256 bits (32-bytes)AES-256
The decrypt command also supports the use of HashiCorp Vault to store secrets, including support for Vault’s AppRole authentication.

​
Decryption options

The following decryption options (or flags) are available for the decrypt command:
Flag or SuperflagSuperflag OptionNotes
--encryptionkey-fileEncryption key filename
-f, --filePath to file for the encrypted RDF or schema .gz file
-h, --helpHelp for the decrypt command
-o, --outPath to file for the decrypted .gz file that decrypt creates
--vaultaddrVault server address, in http://<ip-address>:<port> format (default: http://localhost:8200 )
enc-fieldName of the Vault server’s key/value store field that holds the Base64 encryption key
enc-formatVault server field format; can be raw or base64 (default: base64)
pathVault server key/value store path (default: secret/data/dgraph)
role-id-fileFile containing the Vault role_id used for AppRole authentication
secret-id-fileFile containing the Vault secret_id used for AppRole authentication
To learn more about the --vault superflag and its options that have replaced the --vault_* options in release v20.11 and earlier, see Dgraph CLI Command Reference.

​
Data decryption examples

For example, you could use the following command with an encrypted RDF file (encrypted.rdf.gz) and an encryption key file (enc_key_file), to create a decrypted RDF file: 
# Encryption Key from the file path
dgraph decrypt --file "encrypted.rdf.gz" --out "decrypted_rdf.gz" --encryption key-file="enc-key-file"

# Encryption Key from HashiCorp Vault
dgraph decrypt --file "encrypted.rdf.gz" --out "decrypted_rdf.gz" \
  --vault addr="http://localhost:8200";enc-field="enc_key";enc-format="raw";path="secret/data/dgraph/alpha";role-id-file="./role_id";secret-id-file="./secret_id"
You can use similar syntax to create a decrypted schema file: 
# Encryption Key from the file path
dgraph decrypt --file "encrypted.schema.gz" --out "decrypted_schema.gz" --encryption key-file="enc-key-file"

# Encryption Key from HashiCorp Vault
dgraph decrypt --file "encrypted.schema.gz" --out "decrypted_schema.gz" \
  --vault addr="http://localhost:8200";enc-field="enc_key";enc-format="raw";path="secret/data/dgraph/alpha";role-id-file="./role_id";secret-id-file="./secret_id"