SEED is a block cipher developed by the Korea Information Security Agency (KISA).
Starting with the private sector, the ministry plans to expand this further to ultimately remove this dependency from public websites as well.
It uses two 8 × 8 S-boxes which, like those of SAFER, are derived from discrete exponentiation (in this case, x247 and x251 – plus some "incompatible operations").
SEED has a fairly complex key schedule, generating its thirty-two 32-bit subkeys through application of its G-function on a series of rotations of the raw key, combined with round constants derived (as in TEA) from the Golden ratio.
[8] Bloombase supports SEED in their full suite of data cryptography solutions.