diff --git a/backend/src/graphql/resolver/CommunityResolver.test.ts b/backend/src/graphql/resolver/CommunityResolver.test.ts
index 4f42e9455..e0cdc06fa 100644
--- a/backend/src/graphql/resolver/CommunityResolver.test.ts
+++ b/backend/src/graphql/resolver/CommunityResolver.test.ts
@@ -34,6 +34,60 @@ afterAll(async () => {
   await con.close()
 })
 
+// real valid ed25519 key pairs
+const ed25519KeyPairStaticHex = [
+  {
+    public: '264c1e88914d18166cc31e8d6c2111c03ac83f5910398eb45cd425c6c3836367',
+    private:
+      '0ddcafd5e2da92e171ccc974af22fee3ad8407475e330586c8f259837d4fedc6264c1e88914d18166cc31e8d6c2111c03ac83f5910398eb45cd425c6c3836367',
+  },
+  {
+    public: 'ac18a8754f725079f93d27b9054f2eff536109a2fd439f9755941abdd639baf0',
+    private:
+      '45325a0d0f22655095321d9d05999c65245da02130318ff51da1ee423b836117ac18a8754f725079f93d27b9054f2eff536109a2fd439f9755941abdd639baf0',
+  },
+  {
+    public: '6f7d4ccde610db1e1a33fabbb444d5400013c168296b03fd50bc686d4c1ad0ed',
+    private:
+      '8ab6d5da8b666ef5b3d754559c028806a1e2f8142a3e7ada411a8b6a3fe70eeb6f7d4ccde610db1e1a33fabbb444d5400013c168296b03fd50bc686d4c1ad0ed',
+  },
+  {
+    public: '85fbbce0763db24677cf7cb579a743013557a4fea0a9a624245f3ae8cd785e1d',
+    private:
+      '0369ea7c80c3134c2872c3cf77a68f12d57de57359145b550e3a0c4c8170a31785fbbce0763db24677cf7cb579a743013557a4fea0a9a624245f3ae8cd785e1d',
+  },
+  {
+    public: 'b099d023476ece01f231c269cbe496139ca73b3b4eb705816a511a1ca09661d0',
+    private:
+      '015ac650157b9e9bdbe718940606242daa318a251e8417b49440495e5afe3750b099d023476ece01f231c269cbe496139ca73b3b4eb705816a511a1ca09661d0',
+  },
+  {
+    public: '9f8dc17f1af9f71e9b9a1cd49ca295b89049863515a487578ad4f90b307abf39',
+    private:
+      '0c13e71c55a3c03bd5df05c92bbccde88ad4a47f3bac6bdc5383ef1ec946cfdc9f8dc17f1af9f71e9b9a1cd49ca295b89049863515a487578ad4f90b307abf39',
+  },
+  {
+    public: '34218b2f570d341370dd2db111d0ef2415c03a110c3bf3127c6b2337af71753a',
+    private:
+      '60f3479bba44d035886ac21c362bceece9f9ec81859c9b37f734b6442a06c93b34218b2f570d341370dd2db111d0ef2415c03a110c3bf3127c6b2337af71753a',
+  },
+  {
+    public: 'a447404f5e04ed4896ed64d0f704574ed780b52e90868d4b83e1afb8ea687ff6',
+    private:
+      'ea85ebb4332a52d87fe6f322dcd23ad4afc5eafb93dfff2216f3ffa9f0730e8aa447404f5e04ed4896ed64d0f704574ed780b52e90868d4b83e1afb8ea687ff6',
+  },
+  {
+    public: 'b8b987c55da62b30d929672520551033eb37abdd88f9ea104db5d107c19680b4',
+    private:
+      '29475dbbc96d694b3c653a1e143caf084f6daf2d35267522c4096c55b47e2b76b8b987c55da62b30d929672520551033eb37abdd88f9ea104db5d107c19680b4',
+  },
+  {
+    public: '40203d18a6ff8fb3c4c62d78e4807036fc9207782ce97a9bcf3be0755c236c37',
+    private:
+      '0b5c4d536d222e88b561ea495e15918fb8cba61a3f8c261ec9e587cca560804040203d18a6ff8fb3c4c62d78e4807036fc9207782ce97a9bcf3be0755c236c37',
+  },
+]
+
 describe('CommunityResolver', () => {
   describe('getCommunities', () => {
     let homeCom1: DbFederatedCommunity
@@ -62,10 +116,7 @@ describe('CommunityResolver', () => {
 
         homeCom1 = DbFederatedCommunity.create()
         homeCom1.foreign = false
-        homeCom1.publicKey = Buffer.from(
-          '75bb92ee197a5f5b645669b26b933558870d72791860e4854a41d6bb28e7d61c',
-          'hex',
-        )
+        homeCom1.publicKey = Buffer.from(ed25519KeyPairStaticHex[0].public, 'hex')
         homeCom1.apiVersion = '1_0'
         homeCom1.endPoint = 'http://localhost/api'
         homeCom1.createdAt = new Date()
@@ -73,10 +124,7 @@ describe('CommunityResolver', () => {
 
         homeCom2 = DbFederatedCommunity.create()
         homeCom2.foreign = false
-        homeCom2.publicKey = Buffer.from(
-          '5b47388f9e8db5416201e485398ed0d72ab20d9ee951ccc1754245278e3ae6c6',
-          'hex',
-        )
+        homeCom2.publicKey = Buffer.from(ed25519KeyPairStaticHex[1].public, 'hex')
         homeCom2.apiVersion = '1_1'
         homeCom2.endPoint = 'http://localhost/api'
         homeCom2.createdAt = new Date()
@@ -84,10 +132,7 @@ describe('CommunityResolver', () => {
 
         homeCom3 = DbFederatedCommunity.create()
         homeCom3.foreign = false
-        homeCom3.publicKey = Buffer.from(
-          '2ca593275aa4c11f9c3d43cd4d39586c70e2b7f4359739381940b62d1c8e8928',
-          'hex',
-        )
+        homeCom3.publicKey = Buffer.from(ed25519KeyPairStaticHex[2].public, 'hex')
         homeCom3.apiVersion = '2_0'
         homeCom3.endPoint = 'http://localhost/api'
         homeCom3.createdAt = new Date()
@@ -101,9 +146,7 @@ describe('CommunityResolver', () => {
               {
                 id: 3,
                 foreign: homeCom3.foreign,
-                publicKey: expect.stringMatching(
-                  '2ca593275aa4c11f9c3d43cd4d39586c70e2b7f4359739381940b62d1c8e8928',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[2].public),
                 url: expect.stringMatching('http://localhost/api/2_0'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -114,9 +157,7 @@ describe('CommunityResolver', () => {
               {
                 id: 2,
                 foreign: homeCom2.foreign,
-                publicKey: expect.stringMatching(
-                  '5b47388f9e8db5416201e485398ed0d72ab20d9ee951ccc1754245278e3ae6c6',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[1].public),
                 url: expect.stringMatching('http://localhost/api/1_1'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -127,9 +168,7 @@ describe('CommunityResolver', () => {
               {
                 id: 1,
                 foreign: homeCom1.foreign,
-                publicKey: expect.stringMatching(
-                  '75bb92ee197a5f5b645669b26b933558870d72791860e4854a41d6bb28e7d61c',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[0].public),
                 url: expect.stringMatching('http://localhost/api/1_0'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -149,10 +188,7 @@ describe('CommunityResolver', () => {
 
         foreignCom1 = DbFederatedCommunity.create()
         foreignCom1.foreign = true
-        foreignCom1.publicKey = Buffer.from(
-          '08520bf2990274f829d2a2d45c802e4e854a768ed1c757ea99571a24bbfd87b2',
-          'hex',
-        )
+        foreignCom1.publicKey = Buffer.from(ed25519KeyPairStaticHex[3].public, 'hex')
         foreignCom1.apiVersion = '1_0'
         foreignCom1.endPoint = 'http://remotehost/api'
         foreignCom1.createdAt = new Date()
@@ -160,10 +196,7 @@ describe('CommunityResolver', () => {
 
         foreignCom2 = DbFederatedCommunity.create()
         foreignCom2.foreign = true
-        foreignCom2.publicKey = Buffer.from(
-          '43c72cb81416121f5eb98affa4fb3360088719e80db6aaa13ff7e74d3f669307',
-          'hex',
-        )
+        foreignCom2.publicKey = Buffer.from(ed25519KeyPairStaticHex[4].public, 'hex')
         foreignCom2.apiVersion = '1_1'
         foreignCom2.endPoint = 'http://remotehost/api'
         foreignCom2.createdAt = new Date()
@@ -171,10 +204,7 @@ describe('CommunityResolver', () => {
 
         foreignCom3 = DbFederatedCommunity.create()
         foreignCom3.foreign = true
-        foreignCom3.publicKey = Buffer.from(
-          '4e3bf9536f694124c527b0aaf45aa6aea6c8c5d570d96b54f56f583724212b73',
-          'hex',
-        )
+        foreignCom3.publicKey = Buffer.from(ed25519KeyPairStaticHex[5].public, 'hex')
         foreignCom3.apiVersion = '1_2'
         foreignCom3.endPoint = 'http://remotehost/api'
         foreignCom3.createdAt = new Date()
@@ -188,7 +218,7 @@ describe('CommunityResolver', () => {
               {
                 id: 3,
                 foreign: homeCom3.foreign,
-                publicKey: expect.stringMatching(homeCom3.publicKey.toString('hex')),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[2].public),
                 url: expect.stringMatching('http://localhost/api/2_0'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -199,7 +229,7 @@ describe('CommunityResolver', () => {
               {
                 id: 2,
                 foreign: homeCom2.foreign,
-                publicKey: expect.stringMatching(homeCom2.publicKey.toString('hex')),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[1].public),
                 url: expect.stringMatching('http://localhost/api/1_1'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -210,7 +240,7 @@ describe('CommunityResolver', () => {
               {
                 id: 1,
                 foreign: homeCom1.foreign,
-                publicKey: expect.stringMatching(homeCom1.publicKey.toString('hex')),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[0].public),
                 url: expect.stringMatching('http://localhost/api/1_0'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -221,9 +251,7 @@ describe('CommunityResolver', () => {
               {
                 id: 6,
                 foreign: foreignCom3.foreign,
-                publicKey: expect.stringMatching(
-                  '4e3bf9536f694124c527b0aaf45aa6aea6c8c5d570d96b54f56f583724212b73',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[5].public),
                 url: expect.stringMatching('http://remotehost/api/1_2'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -234,9 +262,7 @@ describe('CommunityResolver', () => {
               {
                 id: 5,
                 foreign: foreignCom2.foreign,
-                publicKey: expect.stringMatching(
-                  '43c72cb81416121f5eb98affa4fb3360088719e80db6aaa13ff7e74d3f669307',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[4].public),
                 url: expect.stringMatching('http://remotehost/api/1_1'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -247,9 +273,7 @@ describe('CommunityResolver', () => {
               {
                 id: 4,
                 foreign: foreignCom1.foreign,
-                publicKey: expect.stringMatching(
-                  '08520bf2990274f829d2a2d45c802e4e854a768ed1c757ea99571a24bbfd87b2',
-                ),
+                publicKey: expect.stringMatching(ed25519KeyPairStaticHex[3].public),
                 url: expect.stringMatching('http://remotehost/api/1_0'),
                 lastAnnouncedAt: null,
                 verifiedAt: null,
@@ -294,14 +318,8 @@ describe('CommunityResolver', () => {
         homeCom1 = DbCommunity.create()
         homeCom1.foreign = false
         homeCom1.url = 'http://localhost/api'
-        homeCom1.publicKey = Buffer.from(
-          '75bb92ee197a5f5b645669b26b933558870d72791860e4854a41d6bb28e7d61c',
-          'hex',
-        )
-        homeCom1.privateKey = Buffer.from(
-          'ddfa39122c9b1951da10a773fc0d3d020e770d89afb489691e247e08c2b7b8aa990b7dda99c5ec5df88bd9a94bc34e2e68a91d05a224ef88fa916e5a1fbb47cb',
-          'hex',
-        )
+        homeCom1.publicKey = Buffer.from(ed25519KeyPairStaticHex[0].public, 'hex')
+        homeCom1.privateKey = Buffer.from(ed25519KeyPairStaticHex[0].private, 'hex')
         homeCom1.communityUuid = 'HomeCom-UUID'
         homeCom1.authenticatedAt = new Date()
         homeCom1.name = 'HomeCommunity-name'
@@ -338,14 +356,8 @@ describe('CommunityResolver', () => {
         homeCom1 = DbCommunity.create()
         homeCom1.foreign = false
         homeCom1.url = 'http://localhost/api'
-        homeCom1.publicKey = Buffer.from(
-          '75bb92ee197a5f5b645669b26b933558870d72791860e4854a41d6bb28e7d61c',
-          'hex',
-        )
-        homeCom1.privateKey = Buffer.from(
-          'ddfa39122c9b1951da10a773fc0d3d020e770d89afb489691e247e08c2b7b8aa990b7dda99c5ec5df88bd9a94bc34e2e68a91d05a224ef88fa916e5a1fbb47cb',
-          'hex',
-        )
+        homeCom1.publicKey = Buffer.from(ed25519KeyPairStaticHex[0].public, 'hex')
+        homeCom1.privateKey = Buffer.from(ed25519KeyPairStaticHex[0].private, 'hex')
         homeCom1.communityUuid = 'HomeCom-UUID'
         homeCom1.authenticatedAt = new Date()
         homeCom1.name = 'HomeCommunity-name'
@@ -356,14 +368,8 @@ describe('CommunityResolver', () => {
         foreignCom1 = DbCommunity.create()
         foreignCom1.foreign = true
         foreignCom1.url = 'http://stage-2.gradido.net/api'
-        foreignCom1.publicKey = Buffer.from(
-          '08520bf2990274f829d2a2d45c802e4e854a768ed1c757ea99571a24bbfd87b2',
-          'hex',
-        )
-        foreignCom1.privateKey = Buffer.from(
-          'd967220052995169b20b89a0c6190ee8aa9ca501d7a6df81c49a97003edca2ed724d69eaf55e62290d699d7c3ec8b44985fffd57def98d51b2202f2bd82330b3',
-          'hex',
-        )
+        foreignCom1.publicKey = Buffer.from(ed25519KeyPairStaticHex[3].public, 'hex')
+        foreignCom1.privateKey = Buffer.from(ed25519KeyPairStaticHex[3].private, 'hex')
         // foreignCom1.communityUuid = 'Stage2-Com-UUID'
         // foreignCom1.authenticatedAt = new Date()
         foreignCom1.name = 'Stage-2_Community-name'
@@ -374,14 +380,8 @@ describe('CommunityResolver', () => {
         foreignCom2 = DbCommunity.create()
         foreignCom2.foreign = true
         foreignCom2.url = 'http://stage-3.gradido.net/api'
-        foreignCom2.publicKey = Buffer.from(
-          '43c72cb81416121f5eb98affa4fb3360088719e80db6aaa13ff7e74d3f669307',
-          'hex',
-        )
-        foreignCom2.privateKey = Buffer.from(
-          '0ae8921a204bd27e1ba834ffa2f4480cca867b4def783934f3032e19c54d6e7c9fb3233eff07a0086f6bd8486e7220136ce941abdd51d268bfaca0cc3181f162',
-          'hex',
-        )
+        foreignCom2.publicKey = Buffer.from(ed25519KeyPairStaticHex[4].public, 'hex')
+        foreignCom2.privateKey = Buffer.from(ed25519KeyPairStaticHex[4].private, 'hex')
         foreignCom2.communityUuid = 'Stage3-Com-UUID'
         foreignCom2.authenticatedAt = new Date()
         foreignCom2.name = 'Stage-3_Community-name'