diff --git a/makefiles/pseudomodules.inc.mk b/makefiles/pseudomodules.inc.mk
index 6fb6e46843..9e17653459 100644
--- a/makefiles/pseudomodules.inc.mk
+++ b/makefiles/pseudomodules.inc.mk
@@ -20,7 +20,6 @@ PSEUDOMODULES += core_%
 PSEUDOMODULES += cortexm_fpu
 PSEUDOMODULES += cortexm_svc
 PSEUDOMODULES += cpu_check_address
-PSEUDOMODULES += crypto_%	# crypto_aes or crypto_3des
 PSEUDOMODULES += dbgpin
 PSEUDOMODULES += devfs_%
 PSEUDOMODULES += dhcpv6_%
diff --git a/pkg/openwsn/Makefile.dep b/pkg/openwsn/Makefile.dep
index 12f55e540e..4af60d9d4c 100644
--- a/pkg/openwsn/Makefile.dep
+++ b/pkg/openwsn/Makefile.dep
@@ -44,7 +44,6 @@ ifneq (,$(filter openwsn_coap,$(USEMODULE)))
 endif
 
 ifneq (,$(filter openwsn_crypto,$(USEMODULE)))
-  USEMODULE += crypto_3des
   USEMODULE += cipher_modes
 endif
 
diff --git a/sys/crypto/Kconfig b/sys/crypto/Kconfig
index 24cf354ed0..ce99ad759a 100644
--- a/sys/crypto/Kconfig
+++ b/sys/crypto/Kconfig
@@ -23,10 +23,6 @@ config CRYPTO_AES
     bool "AES"
     select MODULE_CRYPTO
 
-config MODULE_CRYPTO_3DES
-    bool "3DES (deprecated)"
-    select MODULE_CRYPTO
-
 endchoice
 
 menu "Crypto AES options"
diff --git a/sys/include/crypto/ciphers.h b/sys/include/crypto/ciphers.h
index b34e529672..152dc2b662 100644
--- a/sys/include/crypto/ciphers.h
+++ b/sys/include/crypto/ciphers.h
@@ -50,13 +50,10 @@ extern "C" {
  * Context sizes needed for the different ciphers.
  * Always order by number of bytes descending!!! <br><br>
  *
- * threedes     needs 24  bytes                           <br>
  * aes          needs CIPHERS_MAX_KEY_SIZE bytes          <br>
  */
-#if defined(MODULE_CRYPTO_3DES)
-    #define CIPHER_MAX_CONTEXT_SIZE 24
-#elif IS_USED(MODULE_CRYPTO_AES_256) || IS_USED(MODULE_CRYPTO_AES_192) || \
-      IS_USED(MODULE_CRYPTO_AES_128)
+#if IS_USED(MODULE_CRYPTO_AES_256) || IS_USED(MODULE_CRYPTO_AES_192) || \
+    IS_USED(MODULE_CRYPTO_AES_128)
     #define CIPHER_MAX_CONTEXT_SIZE CIPHERS_MAX_KEY_SIZE
 #else
 /* 0 is not a possibility because 0-sized arrays are not allowed in ISO C */
diff --git a/tests/sys_crypto/Makefile b/tests/sys_crypto/Makefile
index fc2892f7f9..f9438f3de8 100644
--- a/tests/sys_crypto/Makefile
+++ b/tests/sys_crypto/Makefile
@@ -2,7 +2,6 @@ include ../Makefile.tests_common
 
 USEMODULE += embunit
 
-USEMODULE += crypto_3des
 USEMODULE += cipher_modes
 USEMODULE += crypto_aes_128
 USEMODULE += crypto_aes_192