Man pages matching name crypt::cipher::safer_sk128 in section 3pm:

Crypt::Cipher::SAFER_SK128.3pm.en	debian 10 / libcryptx-perl
Crypt::Cipher::SAFER_SK128.3pm.en	debian 11 / libcryptx-perl
Crypt::Cipher::SAFER_SK128.3pm.en	debian 12 / libcryptx-perl