/usr/include/Poco/Crypto/ is in libpoco-dev 1.3.6p1-5.1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/Poco/Crypto/Cipher.h
/usr/include/Poco/Crypto/CipherFactory.h
/usr/include/Poco/Crypto/CipherImpl.h
/usr/include/Poco/Crypto/CipherKey.h
/usr/include/Poco/Crypto/CipherKeyImpl.h
/usr/include/Poco/Crypto/Crypto.h
/usr/include/Poco/Crypto/CryptoStream.h
/usr/include/Poco/Crypto/CryptoTransform.h
/usr/include/Poco/Crypto/OpenSSLInitializer.h
/usr/include/Poco/Crypto/RSACipherImpl.h
/usr/include/Poco/Crypto/RSADigestEngine.h
/usr/include/Poco/Crypto/RSAKey.h
/usr/include/Poco/Crypto/RSAKeyImpl.h
/usr/include/Poco/Crypto/X509Certificate.h