at.favre.lib.armadillo

Interface EncryptionFingerprint

All Known Implementing Classes:

EncryptionFingerprint.Default

public interface EncryptionFingerprint

A EncryptionFingerprint is a semi secret "key" which, during runtime, gathers entropy from e.g. the device, system or other parts are used to create a cryptographic key with which the data is encrypted.

A good EncryptionFingerprint has the following properties

• Hard to guess or figure by an attacker
• Scopes exactly how the data should be bound (e.g. if you want to invalidate the data after OS update, include the OS version)
• Data with high entropy

Note: If the fingerprint changes the data cannot be decrypted anymore.

See EncryptionFingerprintFactory for how to create such fingerprints in the Android framework.

Since:

18.12.2017

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	EncryptionFingerprint.Default Default implementation of a EncryptionFingerprint with simple internal in-memory data obfuscation.

Method Summary

Modifier and Type	Method and Description
byte[]	getBytes()
void	wipe() Wipe and overwrite the internal byte arrays

Method Detail

getBytes

byte[] getBytes()

wipe

void wipe()

Wipe and overwrite the internal byte arrays