# Package org.apache.tomcat.util.security

Interface Summary
PermissionCheck: This interface is implemented by components to enable privileged code to check whether the component has a given permission.

Class Summary
ConcurrentMessageDigest: A thread safe wrapper around `MessageDigest` that does not make use of ThreadLocal and - broadly - only creates enough MessageDigest objects to satisfy the concurrency requirements.
Escape: Provides utility methods to escape content for different contexts.
KeyStoreUtil
MD5Encoder: Deprecated. Unused.
PrivilegedGetTccl
PrivilegedSetAccessControlContext
PrivilegedSetTccl