<a id="cryptographyutil"></a>

# CryptographyUtil

### *class* Daisy.CryptographyUtil.SteelPetal(key: str, nonce=None, testData=None)

Cryptography utility for encrypting files

#### decrypt(data: bytes)

Decrypt encrypted binary data

data: bytes
: Data to decrypt

#### encrypt(data: bytes)

Encrypt binary data

data: bytes
: Data to encrypt

#### pad(key: str)

Pad key to make it usable

key: str
: User’s plain text key