Skip to contents

Byte lengths of an ML-KEM parameter set

Source: R/kem.R
kem_sizes.Rd

Reports the sizes FIPS 203 fixes, so a caller never has to hard-code them.

Usage

kem_sizes(level)

Arguments

level

Security level: 512, 768 or 1024.

Value

A named integer vector: encapsulation_key, decapsulation_key, ciphertext, seed and shared_secret, all in bytes.

See also

kem_keygen().

Examples

kem_sizes(768)
#> encapsulation_key decapsulation_key        ciphertext              seed 
#>              1184              2400              1088                64 
#>     shared_secret 
#>                32 

# the shared secret is 32 bytes at every level: the level buys
# security margin, not a longer secret
vapply(c(512, 768, 1024),
       function(l) kem_sizes(l)[["shared_secret"]], integer(1))
#> [1] 32 32 32