Crate cosmian_findex

Findex is a cryptographic algorithm allowing to securely maintain an encrypted index.

It uses a generic Dictionary Encryption Scheme (Dx-Enc) as building block to implement a Multi-Map Encryption Scheme (MM-Enc). A Graph Encryption Scheme (Gx-Enc) is then built on top of the MM-Enc scheme and finally an Index trait built on top of this Gx-Enc scheme allows indexing both Data and Keywords.

The Index traits is not a cryptographic one. It is used to simplify the interface and to hide the details of the cryptographic implementation when it is possible.

Modules

• macros

Macros

• kmac
  Hashes the given bytes to the desired length using the KMAC algorithm and the given key.

Structs

• ChainTable
  Chain Table representation.
• Data
  A Data is an arbitrary byte-string that is indexed under some keyword.
• EncryptedValue
  Value stored inside the EDX. It is composed of:
• EntryTable
  Implementation of the Entry Table EDX.
• Findex
  Findex type implements the Findex algorithm.
• IndexedValueToKeywordsMap
• Keyword
  A Keyword is a byte vector used to index other values.
• KeywordToDataMap
• Keywords
• Label
  The label is used to provide additional public information to the hash algorithm when generating Entry Table UIDs.
• Token
• TokenToEncryptedValueMap
• TokenWithEncryptedValueList
• Tokens

Enums

• Error
• IndexedValue

Constants

• BLOCK_LENGTH
  Length of the blocks stored in the Chain Table.
• ENTRY_LENGTH
  Value stored in the Entry Table by Findex.
• HASH_LENGTH
  Size of the Findex tag hash used. Only collision resistance is needed: 128 bits should be enough.
• LINE_WIDTH
  Number of blocks stored per line of the Chain Table.
• LINK_LENGTH
• MAC_LENGTH
  Length of the MAC tags used.
• NONCE_LENGTH
  Length of the nonces used.
• SEED_LENGTH
  Seed used to derive the keys. Only collision resistance is needed: 128 bits should be enough.
• SYM_KEY_LENGTH
  Length of the symmetric encryption keys used.
• USER_KEY_LENGTH
  Length of the user key.

Traits

• DbInterface
• DbInterfaceErrorTrait
• DxEnc
• Index
  User-friendly interface to the Findex algorithm.

Type Aliases

• CoreError
  Alias used to represent a Findex error that does not originate from a callback.
• UserKey