diff --git a/Cargo.lock b/Cargo.lock
index c9afa426..fdd9a03b 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3,19 +3,6 @@
 #
 version = 3
 
-[[package]]
-name = "aead"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
-dependencies = [
- "arrayvec",
- "blobby",
- "crypto-common 0.1.6",
- "generic-array",
- "heapless 0.7.16",
-]
-
 [[package]]
 name = "aead"
 version = "0.6.0-pre.0"
@@ -24,8 +11,8 @@ checksum = "3de53f67567d2692f69357ee20fef7ddf7969d1dff34acefc05db91873aee0ce"
 dependencies = [
  "arrayvec",
  "blobby",
- "crypto-common 0.2.0-pre.5",
- "heapless 0.8.0",
+ "crypto-common",
+ "heapless",
 ]
 
 [[package]]
@@ -35,7 +22,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "25512cae539ab9089dcbd69c4f704e787fdc8c1cea8d9daa68a9d89b02b0501f"
 dependencies = [
  "cfg-if",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "cpufeatures",
 ]
 
@@ -43,12 +30,12 @@ dependencies = [
 name = "aes-gcm"
 version = "0.11.0-pre"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "ctr",
  "ghash",
- "hex-literal 0.3.4",
+ "hex-literal",
  "subtle",
  "zeroize",
 ]
@@ -57,9 +44,9 @@ dependencies = [
 name = "aes-gcm-siv"
 version = "0.12.0-pre"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "ctr",
  "polyval",
  "subtle",
@@ -70,15 +57,15 @@ dependencies = [
 name = "aes-siv"
 version = "0.7.0"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
  "blobby",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "cmac",
  "ctr",
  "dbl",
  "digest",
- "hex-literal 0.3.4",
+ "hex-literal",
  "pmac",
  "zeroize",
 ]
@@ -102,28 +89,13 @@ dependencies = [
 name = "ascon-aead"
 version = "0.4.2"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "ascon",
- "hex-literal 0.3.4",
+ "hex-literal",
  "subtle",
  "zeroize",
 ]
 
-[[package]]
-name = "atomic-polyfill"
-version = "0.1.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3ff7eb3f316534d83a8a2c3d1674ace8a5a71198eba31e2e2b597833f699b28"
-dependencies = [
- "critical-section",
-]
-
-[[package]]
-name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
 [[package]]
 name = "blobby"
 version = "0.3.1"
@@ -136,7 +108,7 @@ version = "0.11.0-pre.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3ded684142010808eb980d9974ef794da2bcf97d13396143b1515e9f0fb4a10e"
 dependencies = [
- "crypto-common 0.2.0-pre.5",
+ "crypto-common",
 ]
 
 [[package]]
@@ -158,11 +130,11 @@ checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 name = "ccm"
 version = "0.5.0"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "ctr",
- "hex-literal 0.3.4",
+ "hex-literal",
  "subtle",
 ]
 
@@ -178,7 +150,7 @@ version = "0.10.0-pre"
 source = "git+https://github.com/RustCrypto/stream-ciphers.git#fea3dd013ee9c35fba56903ad44b411957de8cb2"
 dependencies = [
  "cfg-if",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "cpufeatures",
 ]
 
@@ -186,29 +158,20 @@ dependencies = [
 name = "chacha20poly1305"
 version = "0.10.1"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "chacha20",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "poly1305",
  "zeroize",
 ]
 
-[[package]]
-name = "cipher"
-version = "0.3.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7ee52072ec15386f770805afd189a01c8841be8696bed250fa2f13c4c0d6dfb7"
-dependencies = [
- "generic-array",
-]
-
 [[package]]
 name = "cipher"
 version = "0.5.0-pre.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "84fba98785cecd0e308818a87c817576a40f99d8bab6405bf422bacd3efb6c1f"
 dependencies = [
- "crypto-common 0.2.0-pre.5",
+ "crypto-common",
  "inout",
  "zeroize",
 ]
@@ -218,7 +181,7 @@ name = "cmac"
 version = "0.8.0-pre"
 source = "git+https://github.com/RustCrypto/MACs.git#43cc597a8881d6924ae56bb22edf19600e981e3e"
 dependencies = [
- "cipher 0.5.0-pre.4",
+ "cipher",
  "dbl",
  "digest",
 ]
@@ -232,23 +195,6 @@ dependencies = [
  "libc",
 ]
 
-[[package]]
-name = "critical-section"
-version = "1.1.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
-
-[[package]]
-name = "crypto-common"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
-dependencies = [
- "generic-array",
- "rand_core",
- "typenum",
-]
-
 [[package]]
 name = "crypto-common"
 version = "0.2.0-pre.5"
@@ -265,7 +211,7 @@ name = "ctr"
 version = "0.10.0-pre"
 source = "git+https://github.com/RustCrypto/block-modes.git#532a46166bcc74bf718ca351cc3b5a86a2fcb2a3"
 dependencies = [
- "cipher 0.5.0-pre.4",
+ "cipher",
 ]
 
 [[package]]
@@ -281,9 +227,9 @@ dependencies = [
 name = "deoxys"
 version = "0.1.0"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
- "hex-literal 0.3.4",
+ "hex-literal",
  "subtle",
  "zeroize",
 ]
@@ -295,7 +241,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "065d93ead7c220b85d5b4be4795d8398eac4ff68b5ee63895de0a3c1fb6edf25"
 dependencies = [
  "block-buffer",
- "crypto-common 0.2.0-pre.5",
+ "crypto-common",
  "subtle",
 ]
 
@@ -303,24 +249,14 @@ dependencies = [
 name = "eax"
 version = "0.5.0"
 dependencies = [
- "aead 0.6.0-pre.0",
+ "aead",
  "aes",
- "cipher 0.5.0-pre.4",
+ "cipher",
  "cmac",
  "ctr",
  "subtle",
 ]
 
-[[package]]
-name = "generic-array"
-version = "0.14.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
-dependencies = [
- "typenum",
- "version_check",
-]
-
 [[package]]
 name = "getrandom"
 version = "0.2.10"
@@ -342,15 +278,6 @@ dependencies = [
  "polyval",
 ]
 
-[[package]]
-name = "hash32"
-version = "0.2.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b0c35f58762feb77d74ebe43bdbc3210f09be9fe6742234d573bacc26ed92b67"
-dependencies = [
- "byteorder",
-]
-
 [[package]]
 name = "hash32"
 version = "0.3.1"
@@ -360,54 +287,22 @@ dependencies = [
  "byteorder",
 ]
 
-[[package]]
-name = "heapless"
-version = "0.7.16"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "db04bc24a18b9ea980628ecf00e6c0264f3c1426dac36c00cb49b6fbad8b0743"
-dependencies = [
- "atomic-polyfill",
- "hash32 0.2.1",
- "rustc_version",
- "spin",
- "stable_deref_trait",
-]
-
 [[package]]
 name = "heapless"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
 dependencies = [
- "hash32 0.3.1",
+ "hash32",
  "stable_deref_trait",
 ]
 
-[[package]]
-name = "hex-literal"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d70693199b3cf4552f3fa720b54163927a3ebed2aef240efaf556033ab336a11"
-dependencies = [
- "hex-literal-impl",
- "proc-macro-hack",
-]
-
 [[package]]
 name = "hex-literal"
 version = "0.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7ebdb29d2ea9ed0083cd8cece49bbd968021bd99b0849edb4a9a7ee0fdf6a4e0"
 
-[[package]]
-name = "hex-literal-impl"
-version = "0.2.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "59448fc2f82a5fb6907f78c3d69d843e82ff5b051923313cc4438cb0c7b745a8"
-dependencies = [
- "proc-macro-hack",
-]
-
 [[package]]
 name = "hybrid-array"
 version = "0.2.0-rc.7"
@@ -427,55 +322,12 @@ dependencies = [
  "hybrid-array",
 ]
 
-[[package]]
-name = "kuznyechik"
-version = "0.7.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a4e0a85306cf7cdcd497111b9ecd8df4da5290bacd3cc2f426ce3fb2c0a327e"
-dependencies = [
- "cipher 0.3.0",
-]
-
 [[package]]
 name = "libc"
 version = "0.2.149"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a08173bc88b7955d1b3145aa561539096c421ac8debde8cbc3612ec635fee29b"
 
-[[package]]
-name = "lock_api"
-version = "0.4.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3c168f8615b12bc01f9c17e2eb0cc07dcae1940121185446edc3744920e8ef45"
-dependencies = [
- "autocfg",
- "scopeguard",
-]
-
-[[package]]
-name = "magma"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53792c7fca348c3d880c5ab2b0a2378a28edca57d080feabc4b60b4633dff91b"
-dependencies = [
- "cipher 0.3.0",
- "opaque-debug",
-]
-
-[[package]]
-name = "mgm"
-version = "0.5.0-pre.1"
-dependencies = [
- "aead 0.5.2",
- "cfg-if",
- "cipher 0.3.0",
- "cpufeatures",
- "hex-literal 0.2.2",
- "kuznyechik",
- "magma",
- "subtle",
-]
-
 [[package]]
 name = "opaque-debug"
 version = "0.3.0"
@@ -487,7 +339,7 @@ name = "pmac"
 version = "0.8.0-pre"
 source = "git+https://github.com/RustCrypto/MACs.git#43cc597a8881d6924ae56bb22edf19600e981e3e"
 dependencies = [
- "cipher 0.5.0-pre.4",
+ "cipher",
  "dbl",
  "digest",
 ]
@@ -515,12 +367,6 @@ dependencies = [
  "universal-hash",
 ]
 
-[[package]]
-name = "proc-macro-hack"
-version = "0.5.20+deprecated"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc375e1527247fe1a97d8b7156678dfe7c1af2fc075c9a4db3690ecd2a148068"
-
 [[package]]
 name = "proc-macro2"
 version = "1.0.69"
@@ -548,36 +394,6 @@ dependencies = [
  "getrandom",
 ]
 
-[[package]]
-name = "rustc_version"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bfa0f585226d2e68097d4f95d113b15b83a82e819ab25717ec0590d9584ef366"
-dependencies = [
- "semver",
-]
-
-[[package]]
-name = "scopeguard"
-version = "1.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
-
-[[package]]
-name = "semver"
-version = "1.0.20"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "836fa6a3e1e547f9a2c4040802ec865b5d85f4014efe00555d7090a3dcaa1090"
-
-[[package]]
-name = "spin"
-version = "0.9.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6980e8d7511241f8acf4aebddbb1ff938df5eebe98691418c4468d0b72a96a67"
-dependencies = [
- "lock_api",
-]
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.2.0"
@@ -619,16 +435,10 @@ version = "0.6.0-pre.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a05336f34009f6bb1c24794e2c04df87f4a0ced7a091692e395119f34fd3f4c5"
 dependencies = [
- "crypto-common 0.2.0-pre.5",
+ "crypto-common",
  "subtle",
 ]
 
-[[package]]
-name = "version_check"
-version = "0.9.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
-
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
diff --git a/Cargo.toml b/Cargo.toml
index 3e40da00..2389ccd4 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -8,7 +8,8 @@ members = [
     "chacha20poly1305",
     "deoxys",
     "eax",
-    "mgm",
+# mgm still with a MSRV==1.56
+#    "mgm",
 ]
 resolver = "2"
 
diff --git a/mgm/Cargo.lock b/mgm/Cargo.lock
new file mode 100644
index 00000000..15bb3973
--- /dev/null
+++ b/mgm/Cargo.lock
@@ -0,0 +1,282 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "aead"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d122413f284cf2d62fb1b7db97e02edb8cda96d769b16e443a4f6195e35662b0"
+dependencies = [
+ "arrayvec",
+ "blobby",
+ "crypto-common",
+ "generic-array",
+ "heapless",
+]
+
+[[package]]
+name = "arrayvec"
+version = "0.7.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
+
+[[package]]
+name = "atomic-polyfill"
+version = "1.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8cf2bce30dfe09ef0bfaef228b9d414faaf7e563035494d7fe092dba54b300f4"
+dependencies = [
+ "critical-section",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
+
+[[package]]
+name = "blobby"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "847495c209977a90e8aad588b959d0ca9f5dc228096d29a6bd3defd53f35eaec"
+
+[[package]]
+name = "byteorder"
+version = "1.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "cipher"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7ee52072ec15386f770805afd189a01c8841be8696bed250fa2f13c4c0d6dfb7"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "cpufeatures"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "53fe5e26ff1b7aef8bca9c6080520cfb8d9333c7568e1829cef191a9723e5504"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "critical-section"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7059fff8937831a9ae6f0fe4d658ffabf58f2ca96aa9dec1c889f936f705f216"
+
+[[package]]
+name = "crypto-common"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
+dependencies = [
+ "generic-array",
+ "rand_core",
+ "typenum",
+]
+
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.2.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "190092ea657667030ac6a35e305e62fc4dd69fd98ac98631e5d3a2b1575a12b5"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "hash32"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b0c35f58762feb77d74ebe43bdbc3210f09be9fe6742234d573bacc26ed92b67"
+dependencies = [
+ "byteorder",
+]
+
+[[package]]
+name = "heapless"
+version = "0.7.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdc6457c0eb62c71aac4bc17216026d8410337c4126773b9c5daba343f17964f"
+dependencies = [
+ "atomic-polyfill",
+ "hash32",
+ "rustc_version",
+ "spin",
+ "stable_deref_trait",
+]
+
+[[package]]
+name = "hex-literal"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d70693199b3cf4552f3fa720b54163927a3ebed2aef240efaf556033ab336a11"
+dependencies = [
+ "hex-literal-impl",
+ "proc-macro-hack",
+]
+
+[[package]]
+name = "hex-literal-impl"
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diff --git a/mgm/Cargo.toml b/mgm/Cargo.toml
index 9cc233b6..14206b37 100644
--- a/mgm/Cargo.toml
+++ b/mgm/Cargo.toml
@@ -1,3 +1,5 @@
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 name = "mgm"
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