diff --git a/internal/api/ws/ws.go b/internal/api/ws/ws.go
index 981d1b41..02c2f90c 100644
--- a/internal/api/ws/ws.go
+++ b/internal/api/ws/ws.go
@@ -11,7 +11,7 @@ import (
 
 	"github.com/AlexxIT/go2rtc/internal/api"
 	"github.com/AlexxIT/go2rtc/internal/app"
-	"github.com/AlexxIT/go2rtc/pkg/core"
+	"github.com/AlexxIT/go2rtc/pkg/creds"
 	"github.com/gorilla/websocket"
 	"github.com/rs/zerolog"
 )
@@ -133,7 +133,7 @@ func apiWS(w http.ResponseWriter, r *http.Request) {
 		if handler := wsHandlers[msg.Type]; handler != nil {
 			go func() {
 				if err = handler(tr, msg); err != nil {
-					errMsg := core.StripUserinfo(err.Error())
+					errMsg := creds.SecretString(err.Error())
 					tr.Write(&Message{Type: "error", Value: msg.Type + ": " + errMsg})
 				}
 			}()
diff --git a/pkg/core/helpers.go b/pkg/core/helpers.go
index 52b969a7..45bbd0d5 100644
--- a/pkg/core/helpers.go
+++ b/pkg/core/helpers.go
@@ -2,7 +2,6 @@ package core
 
 import (
 	"crypto/rand"
-	"regexp"
 	"runtime"
 	"strconv"
 	"strings"
@@ -93,14 +92,3 @@ func Caller() string {
 	_, file, line, _ := runtime.Caller(1)
 	return file + ":" + strconv.Itoa(line)
 }
-
-const (
-	unreserved = `A-Za-z0-9-._~`
-	subdelims  = `!$&'()*+,;=`
-	userinfo   = unreserved + subdelims + `%:`
-)
-
-func StripUserinfo(s string) string {
-	sanitizer := regexp.MustCompile(`://[` + userinfo + `]+@`)
-	return sanitizer.ReplaceAllString(s, `://***@`)
-}
diff --git a/pkg/creds/secrets.go b/pkg/creds/secrets.go
index a9a0094e..95ab4828 100644
--- a/pkg/creds/secrets.go
+++ b/pkg/creds/secrets.go
@@ -3,6 +3,7 @@ package creds
 import (
 	"io"
 	"net/http"
+	"regexp"
 	"slices"
 	"strings"
 	"sync"
@@ -27,6 +28,7 @@ func AddSecret(value string) {
 var secrets []string
 var secretsMu sync.Mutex
 var secretsReplacer *strings.Replacer
+var userinfoRegexp *regexp.Regexp
 
 func getReplacer() *strings.Replacer {
 	secretsMu.Lock()
@@ -40,14 +42,33 @@ func getReplacer() *strings.Replacer {
 		secretsReplacer = strings.NewReplacer(oldnew...)
 	}
 
+	if userinfoRegexp == nil {
+		userinfoRegexp = regexp.MustCompile(`://[` + userinfo + `]+@`)
+	}
+
 	return secretsReplacer
 }
 
+// Uniform Resource Identifier (URI)
+// https://datatracker.ietf.org/doc/html/rfc3986
+const (
+	unreserved = `A-Za-z0-9-._~`
+	subdelims  = `!$&'()*+,;=`
+	userinfo   = unreserved + subdelims + `%:`
+)
+
 func SecretString(s string) string {
 	re := getReplacer()
+	s = userinfoRegexp.ReplaceAllString(s, `://***@`)
 	return re.Replace(s)
 }
 
+func SecretWrite(w io.Writer, s string) (n int, err error) {
+	re := getReplacer()
+	s = userinfoRegexp.ReplaceAllString(s, `://***@`)
+	return re.WriteString(w, s)
+}
+
 func SecretWriter(w io.Writer) io.Writer {
 	return &secretWriter{w}
 }
@@ -57,27 +78,17 @@ type secretWriter struct {
 }
 
 func (s *secretWriter) Write(b []byte) (int, error) {
-	re := getReplacer()
-	return re.WriteString(s.w, string(b))
-}
-
-type secretResponse struct {
-	w http.ResponseWriter
-}
-
-func (s *secretResponse) Header() http.Header {
-	return s.w.Header()
-}
-
-func (s *secretResponse) Write(b []byte) (int, error) {
-	re := getReplacer()
-	return re.WriteString(s.w, string(b))
-}
-
-func (s *secretResponse) WriteHeader(statusCode int) {
-	s.w.WriteHeader(statusCode)
+	return SecretWrite(s.w, string(b))
 }
 
 func SecretResponse(w http.ResponseWriter) http.ResponseWriter {
 	return &secretResponse{w}
 }
+
+type secretResponse struct {
+	http.ResponseWriter
+}
+
+func (s *secretResponse) Write(b []byte) (int, error) {
+	return SecretWrite(s.ResponseWriter, string(b))
+}