/usr/include/Poco/Crypto/ is in libpoco-dev 1.8.0.1-1ubuntu4.
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/CryptoException.h
/usr/include/Poco/Crypto/CryptoStream.h
/usr/include/Poco/Crypto/CryptoTransform.h
/usr/include/Poco/Crypto/DigestEngine.h
/usr/include/Poco/Crypto/ECDSADigestEngine.h
/usr/include/Poco/Crypto/ECKey.h
/usr/include/Poco/Crypto/ECKeyImpl.h
/usr/include/Poco/Crypto/EVPPKey.h
/usr/include/Poco/Crypto/KeyPair.h
/usr/include/Poco/Crypto/KeyPairImpl.h
/usr/include/Poco/Crypto/OpenSSLInitializer.h
/usr/include/Poco/Crypto/PKCS12Container.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