Struct google_api_proto::google::privacy::dlp::v2::CryptoReplaceFfxFpeConfig

pub struct CryptoReplaceFfxFpeConfig {
    pub crypto_key: Option<CryptoKey>,
    pub context: Option<FieldId>,
    pub surrogate_info_type: Option<InfoType>,
    pub alphabet: Option<Alphabet>,
}

Replaces an identifier with a surrogate using Format Preserving Encryption (FPE) with the FFX mode of operation; however when used in the ReidentifyContent API method, it serves the opposite function by reversing the surrogate back into the original identifier. The identifier must be encoded as ASCII. For a given crypto key and context, the same identifier will be replaced with the same surrogate. Identifiers must be at least two characters long. In the case that the identifier is the empty string, it will be skipped. See https://cloud.google.com/sensitive-data-protection/docs/pseudonymization to learn more.

Note: We recommend using CryptoDeterministicConfig for all use cases which do not require preserving the input alphabet space and size, plus warrant referential integrity.

Fields

crypto_key: Option<CryptoKey>

Required. The key used by the encryption algorithm.

context: Option<FieldId>

The ‘tweak’, a context may be used for higher security since the same identifier in two different contexts won’t be given the same surrogate. If the context is not set, a default tweak will be used.

If the context is set but:

1. there is no record present when transforming a given value or
2. the field is not present when transforming a given value,

a default tweak will be used.

Note that case (1) is expected when an InfoTypeTransformation is applied to both structured and unstructured ContentItems. Currently, the referenced field may be of value type integer or string.

The tweak is constructed as a sequence of bytes in big endian byte order such that:

• a 64 bit integer is encoded followed by a single byte of value 1
• a string is encoded in UTF-8 format followed by a single byte of value 2

surrogate_info_type: Option<InfoType>

The custom infoType to annotate the surrogate with. This annotation will be applied to the surrogate by prefixing it with the name of the custom infoType followed by the number of characters comprising the surrogate. The following scheme defines the format: info_type_name(surrogate_character_count):surrogate

For example, if the name of custom infoType is ‘MY_TOKEN_INFO_TYPE’ and the surrogate is ‘abc’, the full replacement value will be: ‘MY_TOKEN_INFO_TYPE(3):abc’

This annotation identifies the surrogate when inspecting content using the custom infoType SurrogateType. This facilitates reversal of the surrogate when it occurs in free text.

In order for inspection to work properly, the name of this infoType must not occur naturally anywhere in your data; otherwise, inspection may find a surrogate that does not correspond to an actual identifier. Therefore, choose your custom infoType name carefully after considering what your data looks like. One way to select a name that has a high chance of yielding reliable detection is to include one or more unicode characters that are highly improbable to exist in your data. For example, assuming your data is entered from a regular ASCII keyboard, the symbol with the hex code point 29DD might be used like so: ⧝MY_TOKEN_TYPE

alphabet: Option<Alphabet>

Choose an alphabet which the data being transformed will be made up of.

Trait Implementations

impl Clone for CryptoReplaceFfxFpeConfig

fn clone(&self) -> CryptoReplaceFfxFpeConfig

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for CryptoReplaceFfxFpeConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for CryptoReplaceFfxFpeConfig

fn default() -> Self

Returns the “default value” for a type.

impl Message for CryptoReplaceFfxFpeConfig

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl PartialEq for CryptoReplaceFfxFpeConfig

fn eq(&self, other: &CryptoReplaceFfxFpeConfig) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for CryptoReplaceFfxFpeConfig