Man pages matching name crypt::dsa::keychain in section 3pm:

Crypt::DSA::KeyChain.3pm.en	debian 10 / libcrypt-dsa-perl
Crypt::DSA::KeyChain.3pm.en	debian 11 / libcrypt-dsa-perl
Crypt::DSA::KeyChain.3pm.en	debian 12 / libcrypt-dsa-perl