nextcloud-server/lib/private/Security
..
Bruteforce
CSP
CSRF
FeaturePolicy
IdentityProof
Ip
Normalizer
RateLimiting
Signature
VerificationToken
Certificate.php
CertificateManager.php
CredentialsManager.php
Crypto.php
Hasher.php
RemoteHostValidator.php
SecureRandom.php
TrustedDomainHelper.php