From https://riscv.org/blog/2021/09/risc-v-cryptography-extensions-task-group-announces-public-review-of-the-scalar-cryptography-extensions/

Zknd – NIST Suite: AES Decryption
Zkne – NIST Suite: AES Encryption
Zknh – NIST Suite: Hash Function Instructions
Zksed – ShangMi Suite: SM4 Block Cipher Instructions
Zksh – ShangMi Suite: SM3 Hash Function Instructions
Zkr – Entropy Source Extension
Zkn – NIST Algorithm Suite (shorthand for Zknd_Zkne_Zknh_Zbkb_Zbkc_Zbkx)
Zks – ShangMi Algorithm Suite  (shorthand for Zksed_Zksh_Zbkb_Zbkc_Zbkx)
Zk – Standard scalar cryptography extension (shorthand for Zkn_Zkt_Zkr)
Zkt – Data Independent Execution Latency
Zbkb – Bitmanip instructions for Cryptography
Zbkc – Carry-less multiply instructions
Zbkx – Crossbar permutation instructions

