- Added audienceMatchPolicy field to AuthenticationConfiguration and support for configuring multiple audiences.
  The "audienceMatchPolicy" can be empty (or unset) when a single audience is specified in the "audiences" field.
  The "audienceMatchPolicy" must be set to "MatchAny" when multiple audiences are specified in the "audiences" field. ([#123165](https://github.com/kubernetes/kubernetes/pull/123165), [@aramase](https://github.com/aramase))

## Deprecations

- kube-apiserver
  - The `--service-account-api-audiences` flag is deprecated in favor of `--api-audiences`. The old flag is accepted with a warning but will be removed in a future release. ([#70105](https://github.com/kubernetes/kubernetes/pull/70105), [@mikedanese](https://github.com/mikedanese))

## Changes by Kind

### Deprecation

- API server's deprecated `--service-account-api-audiences` flag was removed.  Use `--api-audiences` instead. ([#108624](https://github.com/kubernetes/kubernetes/pull/108624), [@ialidzhikov](https://github.com/ialidzhikov))

- Only extend token lifetimes when `--service-account-extend-token-expiration` is true and the requested token audiences are empty or exactly match all values for `--api-audiences`. ([#105954](https://github.com/kubernetes/kubernetes/pull/105954), [@jyotimahapatra](https://github.com/jyotimahapatra))

- TokenRequest and TokenRequestProjection are now beta features. To enable these feature, the API server needs to be started with the `--service-account-issuer`, `--service-account-signing-key-file`, and `--service-account-api-audiences` flags.
([#67349](https://github.com/kubernetes/kubernetes/pull/67349), [@mikedanese](https://github.com/mikedanese))

        "description": "TokenRequest contains parameters of a service account token.",
        "properties": {
          "audience": {
            "default": "",
            "description": "audience is the intended audience of the token in \"TokenRequestSpec\". It will default to the audiences of kube apiserver.",
            "type": "string"
          },
          "expirationSeconds": {

// otherwise).
message ServiceAccountTokenProjection {
  // audience is the intended audience of the token. A recipient of a token
  // must identify itself with an identifier specified in the audience of the
  // token, and otherwise should reject the token. The audience defaults to the
  // identifier of the apiserver.
  // +optional
  optional string audience = 1;

// otherwise).
type ServiceAccountTokenProjection struct {
	// Audience is the intended audience of the token. A recipient of a token
	// must identify itself with an identifier specified in the audience of the
	// token, and otherwise should reject the token. The audience defaults to the
	// identifier of the apiserver.
	Audience string
	// ExpirationSeconds is the requested duration of validity of the service

	"audience":          "audience is the intended audience of the token. A recipient of a token must identify itself with an identifier specified in the audience of the token, and otherwise should reject the token. The audience defaults to the identifier of the apiserver.",

type ServiceAccountTokenProjection struct {
	// audience is the intended audience of the token. A recipient of a token
	// must identify itself with an identifier specified in the audience of the
	// token, and otherwise should reject the token. The audience defaults to the
	// identifier of the apiserver.
	// +optional
	Audience string `json:"audience,omitempty" protobuf:"bytes,1,rep,name=audience"`