Module encryption

Collection of encryption-related data structures and algorithms used in the Solana zk-token protocol.

The module contains implementations of the following cryptographic objects:

• Pedersen commitments that uses the prime-order Ristretto representation of Curve25519. curve25519-dalek is used for the Ristretto group implementation.
• The twisted ElGamal scheme, which converts Pedersen commitments into a public-key encryption scheme.
• Basic type-wrapper around the AES-GCM-SIV symmetric authenticated encryption scheme implemented by aes-gcm-siv crate.

Modules

• auth_encryption
  Authenticated encryption implementation.
• discrete_log
  The discrete log implementation for the twisted ElGamal decryption.
• elgamal
  The twisted ElGamal encryption implementation.
• grouped_elgamal
  The twisted ElGamal group encryption implementation.
• pedersen
  Pedersen commitment implementation using the Ristretto prime-order group.
• pod

Constants

• AE_CIPHERTEXT_LEN
  Byte length of a complete authenticated encryption ciphertext component that includes the ciphertext and nonce components
• AE_KEY_LEN
  Byte length of an authenticated encryption secret key
• DECRYPT_HANDLE_LEN
  Byte length of a decrypt handle
• ELGAMAL_CIPHERTEXT_LEN
  Byte length of an ElGamal ciphertext
• ELGAMAL_KEYPAIR_LEN
  Byte length of an ElGamal keypair
• ELGAMAL_PUBKEY_LEN
  Byte length of an ElGamal public key
• ELGAMAL_SECRET_KEY_LEN
  Byte length of an ElGamal secret key
• PEDERSEN_COMMITMENT_LEN
  Byte length of a Pedersen commitment.
• PEDERSEN_OPENING_LEN
  Byte length of a Pedersen opening.