* system does not support {@link SecureDirectoryStream}).
   *
   * <p><b>Warning:</b> On a file system that supports symbolic links, it is possible for an
   * insecure recursive delete to delete files and directories that are <i>outside</i> the directory
   * being deleted. This can happen if, after checking that a file is a directory (and not a

   * system does not support {@link SecureDirectoryStream}).
   *
   * <p><b>Warning:</b> On a file system that supports symbolic links, it is possible for an
   * insecure recursive delete to delete files and directories that are <i>outside</i> the directory
   * being deleted. This can happen if, after checking that a file is a directory (and not a

-->

## Introduction {#intro}

Go's emphasis on backwards compatibility is one of its key strengths.
There are, however, times when we cannot maintain complete compatibility.
If code depends on buggy (including insecure) behavior,
then fixing the bug will break that code.
New features can also have similar impacts:
enabling the HTTP/2 use by the HTTP client broke programs
connecting to servers with buggy HTTP/2 implementations.

      }

      return exceptions;
    } catch (DirectoryIteratorException e) {
      return addException(exceptions, e.getCause());
    }
  }

  /**
   * Insecure recursive delete for file systems that don't support {@code SecureDirectoryStream}.
   * Returns a collection of exceptions that occurred or null if no exceptions were thrown.
   */
  @CheckForNull

      }

      return exceptions;
    } catch (DirectoryIteratorException e) {
      return addException(exceptions, e.getCause());
    }
  }

  /**
   * Insecure recursive delete for file systems that don't support {@code SecureDirectoryStream}.
   * Returns a collection of exceptions that occurred or null if no exceptions were thrown.
   */
  @CheckForNull

    t, inverse Gamma) now fully reparameterized.
*   Java: Experimental wrapper classes to make graph generation easier. Thanks
    @karllessard and @kbsriram
*   Build & link in secure gRPC components (switch from the insecure grpc
    dependency to secure grpc dependency).
*   Adding new endpoints for existing tensorflow symbols. These endpoints are
    going to be the preferred endpoints going forward and may replace some of

Istio is composed of these components:

- **Envoy** - Sidecar proxies per microservice to handle ingress/egress traffic
   between services in the cluster and from a service to external
   services. The proxies form a _secure microservice mesh_ providing a rich
   set of functions like discovery, rich layer-7 routing, circuit breakers,
   policy enforcement and telemetry recording/reporting
   functions.

                try {
                    if (securityDispatcher.isLegacyEncryptedString(password)) {
                        problems.add(new DefaultSettingsProblem(
                                "Legacy/insecurely encrypted password detected for server " + server.getId(),
                                Severity.WARNING,
                                "server: " + server.getId(),
                                -1,

# OAuth2 with Password (and hashing), Bearer with JWT tokens

Now that we have all the security flow, let's make the application actually secure, using <abbr title="JSON Web Tokens">JWT</abbr> tokens and secure password hashing.

This code is something you can actually use in your application, save the password hashes in your database, etc.

We are going to start from where we left in the previous chapter and increment it.

## About JWT

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