LWE and RLWE types

lwe_types.md

Attributes

Application Data Info Attribute

• underlying message data type? i1, i32, f32
• any other semantic info?
• precision?

Plaintext Encoding Info

• plaintext modulus p
• delta for scaling factor?
• OLD TFHE: shift info?
• encoding type:
  • constant_coefficient_encoding
  • trivial_coefficient_packing
  • digitwise_coefficient_packing
  • crt_packing
  • inverse_canonical_embedding_encoding

Key Info Attributes

• key identifier
• key basis

Encryption Info Attributes

• Ciphertext modulus q
• MSB/LSB/mixed (use q & p to calculate encryption)

Modulus chain info attr

• moduli_chain
• current modulus
• modulus switching info? (is key ID enough?)

Types

LWE Plaintext:

• Application Data Info Attribute
• Plaintext Encoding Info
  • encoding type must be constant_coefficient_encoding (sort of implicit)

LWE Ciphertext:

• Application Data Info Attribute
• Plaintext Encoding Info
  • encoding type must be constant_coefficient_encoding (sort of implicit)
• Key info attribute
• Encryption info attribute

RLWE Plaintext:

• Ring info
• Application Data Info Attribute
• Plaintext Encoding Info

RLWE Ciphertext:

• Ring information
• rlwe dimension/size: default 2
• Application Data Info Attribute
• Plaintext Encoding Info
• Key info attributes
• Encryption attributes
• Modulus chain info