diff --git a/backend/src/federation/authenticateCommunities.ts b/backend/src/federation/authenticateCommunities.ts
index f7a79772a..bbfd3c2d6 100644
--- a/backend/src/federation/authenticateCommunities.ts
+++ b/backend/src/federation/authenticateCommunities.ts
@@ -7,9 +7,10 @@ import { AuthenticationClient as V1_0_AuthenticationClient } from '@/federation/
 import { ensureUrlEndsWithSlash } from '@/util/utilities'
 
 import { LOG4JS_BASE_CATEGORY_NAME } from '@/config/const'
-import { encryptAndSign, EncryptedTransferArgs, OpenConnectionJwtPayloadType } from 'core'
+import { encryptAndSign, OpenConnectionJwtPayloadType } from 'shared'
 import { getLogger } from 'log4js'
 import { AuthenticationClientFactory } from './client/AuthenticationClientFactory'
+import { EncryptedTransferArgs } from 'core'
 
 const logger = getLogger(`${LOG4JS_BASE_CATEGORY_NAME}.federation.authenticateCommunities`)
 
diff --git a/backend/src/federation/validateCommunities.ts b/backend/src/federation/validateCommunities.ts
index 4e41cfef1..478261386 100644
--- a/backend/src/federation/validateCommunities.ts
+++ b/backend/src/federation/validateCommunities.ts
@@ -2,6 +2,7 @@ import {
   Community as DbCommunity,
   FederatedCommunity as DbFederatedCommunity,
   FederatedCommunityLoggingView,
+  getHomeCommunity,
 } from 'database'
 import { IsNull } from 'typeorm'
 
@@ -10,7 +11,7 @@ import { FederationClient as V1_0_FederationClient } from '@/federation/client/1
 import { PublicCommunityInfo } from '@/federation/client/1_0/model/PublicCommunityInfo'
 import { FederationClientFactory } from '@/federation/client/FederationClientFactory'
 import { LogError } from '@/server/LogError'
-import { createKeyPair } from 'core'
+import { createKeyPair } from 'shared'
 import { getLogger } from 'log4js'
 import { startCommunityAuthentication } from './authenticateCommunities'
 import { PublicCommunityInfoLoggingView } from './client/1_0/logging/PublicCommunityInfoLogging.view'
@@ -85,13 +86,13 @@ export async function writeJwtKeyPairInHomeCommunity(): Promise<DbCommunity> {
   logger.debug(`Federation: writeJwtKeyPairInHomeCommunity`)
   try {
     // check for existing homeCommunity entry
-    let homeCom = await DbCommunity.findOne({ where: { foreign: false } })
+    let homeCom = await getHomeCommunity()
     if (homeCom) {
       if (!homeCom.publicJwtKey && !homeCom.privateJwtKey) {
         // Generate key pair using jose library
         const { publicKey, privateKey } = await createKeyPair();
         logger.debug(`Federation: writeJwtKeyPairInHomeCommunity publicKey=`, publicKey);
-        logger.debug(`Federation: writeJwtKeyPairInHomeCommunity privateKey=`, privateKey);
+        logger.debug(`Federation: writeJwtKeyPairInHomeCommunity privateKey=`, privateKey.slice(0, 20));
         
         homeCom.publicJwtKey = publicKey;
         logger.debug(`Federation: writeJwtKeyPairInHomeCommunity publicJwtKey.length=`, homeCom.publicJwtKey.length);
diff --git a/backend/src/graphql/resolver/TransactionLinkResolver.ts b/backend/src/graphql/resolver/TransactionLinkResolver.ts
index 14dac8342..32464cc82 100644
--- a/backend/src/graphql/resolver/TransactionLinkResolver.ts
+++ b/backend/src/graphql/resolver/TransactionLinkResolver.ts
@@ -39,12 +39,10 @@ import { TRANSACTIONS_LOCK } from '@/util/TRANSACTIONS_LOCK'
 import { TRANSACTION_LINK_LOCK } from '@/util/TRANSACTION_LINK_LOCK'
 import { fullName } from '@/util/utilities'
 import { calculateBalance } from '@/util/validate'
-import { RedeemJwtPayloadType, decode, encode, verify } from 'core'
-import { calculateDecay } from 'shared'
+import { calculateDecay, decode, DisburseJwtPayloadType, encode, RedeemJwtPayloadType, verify } from 'shared'
 
 import { LOG4JS_BASE_CATEGORY_NAME } from '@/config/const'
-import { DisburseJwtPayloadType } from 'core'
-import { Logger, getLogger } from 'log4js'
+import { getLogger, Logger } from 'log4js'
 import { executeTransaction } from './TransactionResolver'
 import {
   getAuthenticatedCommunities,
diff --git a/core/src/index.ts b/core/src/index.ts
index 97aa4521e..28aae758a 100644
--- a/core/src/index.ts
+++ b/core/src/index.ts
@@ -1,12 +1,3 @@
 export * from './validation/user'
-export * from './auth/jwt/JWT'
-export * from './auth/jwt/payloadtypes/AuthenticationJwtPayloadType'
-export * from './auth/jwt/payloadtypes/AuthenticationResponseJwtPayloadType'
-export * from './auth/jwt/payloadtypes/DisburseJwtPayloadType'
-export * from './auth/jwt/payloadtypes/EncryptedJWEJwtPayloadType'
-export * from './auth/jwt/payloadtypes/JwtPayloadType'
-export * from './auth/jwt/payloadtypes/OpenConnectionJwtPayloadType'
-export * from './auth/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType'
-export * from './auth/jwt/payloadtypes/RedeemJwtPayloadType'
 export * from './graphql/logic/interpretEncryptedTransferArgs'
 export * from './graphql/model/EncryptedTransferArgs'
diff --git a/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts b/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
index c28d7e05c..ae17ecc66 100644
--- a/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
+++ b/federation/src/graphql/api/1_0/resolver/AuthenticationResolver.ts
@@ -1,6 +1,6 @@
 import { CONFIG } from '@/config'
 import { LOG4JS_BASE_CATEGORY_NAME } from '@/config/const'
-import { AuthenticationJwtPayloadType, AuthenticationResponseJwtPayloadType, encryptAndSign, EncryptedTransferArgs, interpretEncryptedTransferArgs, OpenConnectionCallbackJwtPayloadType, OpenConnectionJwtPayloadType } from 'core'
+import { EncryptedTransferArgs, interpretEncryptedTransferArgs } from 'core'
 import {
   CommunityLoggingView,
   Community as DbCommunity,
@@ -9,6 +9,7 @@ import {
   getHomeCommunity,
 } from 'database'
 import { getLogger } from 'log4js'
+import { AuthenticationJwtPayloadType, AuthenticationResponseJwtPayloadType, encryptAndSign, OpenConnectionCallbackJwtPayloadType, OpenConnectionJwtPayloadType } from 'shared'
 import { Arg, Mutation, Resolver } from 'type-graphql'
 import { startAuthentication, startOpenConnectionCallback } from '../util/authenticateCommunity'
 
diff --git a/shared/src/const/index.ts b/shared/src/const/index.ts
index 6976b019a..1033ecaf1 100644
--- a/shared/src/const/index.ts
+++ b/shared/src/const/index.ts
@@ -1,2 +1,3 @@
 export const DECAY_START_TIME = new Date('2021-05-13T17:46:31Z')
-export const LOG4JS_BASE_CATEGORY_NAME = 'shared'
\ No newline at end of file
+export const LOG4JS_BASE_CATEGORY_NAME = 'shared'
+export const REDEEM_JWT_TOKEN_EXPIRATION = '10m'
\ No newline at end of file
diff --git a/shared/src/index.ts b/shared/src/index.ts
index 4c6acd552..075272308 100644
--- a/shared/src/index.ts
+++ b/shared/src/index.ts
@@ -1,3 +1,12 @@
 export * from './schema'
 export * from './enum'
 export * from './logic/decay'
+export * from './jwt/JWT'
+export * from './jwt/payloadtypes/AuthenticationJwtPayloadType'
+export * from './jwt/payloadtypes/AuthenticationResponseJwtPayloadType'
+export * from './jwt/payloadtypes/DisburseJwtPayloadType'
+export * from './jwt/payloadtypes/EncryptedJWEJwtPayloadType'
+export * from './jwt/payloadtypes/JwtPayloadType'
+export * from './jwt/payloadtypes/OpenConnectionJwtPayloadType'
+export * from './jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType'
+export * from './jwt/payloadtypes/RedeemJwtPayloadType'
diff --git a/core/src/auth/jwt/JWT.test.ts b/shared/src/jwt/JWT.test.ts
similarity index 100%
rename from core/src/auth/jwt/JWT.test.ts
rename to shared/src/jwt/JWT.test.ts
diff --git a/core/src/auth/jwt/JWT.ts b/shared/src/jwt/JWT.ts
similarity index 98%
rename from core/src/auth/jwt/JWT.ts
rename to shared/src/jwt/JWT.ts
index 2153cd3fc..362fa85e3 100644
--- a/core/src/auth/jwt/JWT.ts
+++ b/shared/src/jwt/JWT.ts
@@ -1,5 +1,5 @@
 import { generateKeyPair, exportSPKI, exportPKCS8, SignJWT, decodeJwt, importPKCS8, importSPKI, jwtVerify, CompactEncrypt, compactDecrypt } from 'jose'
-import { LOG4JS_BASE_CATEGORY_NAME } from '../../config/const'
+import { LOG4JS_BASE_CATEGORY_NAME } from '../const'
 import { getLogger } from 'log4js'
 
 const logger = getLogger(`${LOG4JS_BASE_CATEGORY_NAME}.auth.jwt.JWT`)
diff --git a/core/src/auth/jwt/payloadtypes/AuthenticationJwtPayloadType.ts b/shared/src/jwt/payloadtypes/AuthenticationJwtPayloadType.ts
similarity index 100%
rename from core/src/auth/jwt/payloadtypes/AuthenticationJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/AuthenticationJwtPayloadType.ts
diff --git a/core/src/auth/jwt/payloadtypes/AuthenticationResponseJwtPayloadType.ts b/shared/src/jwt/payloadtypes/AuthenticationResponseJwtPayloadType.ts
similarity index 100%
rename from core/src/auth/jwt/payloadtypes/AuthenticationResponseJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/AuthenticationResponseJwtPayloadType.ts
diff --git a/core/src/auth/jwt/payloadtypes/DisburseJwtPayloadType.ts b/shared/src/jwt/payloadtypes/DisburseJwtPayloadType.ts
similarity index 100%
rename from core/src/auth/jwt/payloadtypes/DisburseJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/DisburseJwtPayloadType.ts
diff --git a/core/src/auth/jwt/payloadtypes/EncryptedJWEJwtPayloadType.ts b/shared/src/jwt/payloadtypes/EncryptedJWEJwtPayloadType.ts
similarity index 100%
rename from core/src/auth/jwt/payloadtypes/EncryptedJWEJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/EncryptedJWEJwtPayloadType.ts
diff --git a/core/src/auth/jwt/payloadtypes/JwtPayloadType.ts b/shared/src/jwt/payloadtypes/JwtPayloadType.ts
similarity index 91%
rename from core/src/auth/jwt/payloadtypes/JwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/JwtPayloadType.ts
index 3ed4b466f..561a9268d 100644
--- a/core/src/auth/jwt/payloadtypes/JwtPayloadType.ts
+++ b/shared/src/jwt/payloadtypes/JwtPayloadType.ts
@@ -1,6 +1,6 @@
 import { JWTPayload } from 'jose'
 
-import { REDEEM_JWT_TOKEN_EXPIRATION } from '../../../config/const'
+import { REDEEM_JWT_TOKEN_EXPIRATION } from '../../const'
 
 export class JwtPayloadType implements JWTPayload {
   static ISSUER = 'urn:gradido:issuer'
diff --git a/core/src/auth/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts b/shared/src/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts
similarity index 94%
rename from core/src/auth/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts
index aa7906b60..7b4992284 100644
--- a/core/src/auth/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts
+++ b/shared/src/jwt/payloadtypes/OpenConnectionCallbackJwtPayloadType.ts
@@ -1,4 +1,3 @@
-// import { JWTPayload } from 'jose'
 import { JwtPayloadType } from './JwtPayloadType'
 
 export class OpenConnectionCallbackJwtPayloadType extends JwtPayloadType {
diff --git a/core/src/auth/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts b/shared/src/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts
similarity index 93%
rename from core/src/auth/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts
index 8843ff4e3..3a3c249cb 100644
--- a/core/src/auth/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts
+++ b/shared/src/jwt/payloadtypes/OpenConnectionJwtPayloadType.ts
@@ -1,4 +1,3 @@
-// import { JWTPayload } from 'jose'
 import { JwtPayloadType } from './JwtPayloadType'
 
 export class OpenConnectionJwtPayloadType extends JwtPayloadType {
diff --git a/core/src/auth/jwt/payloadtypes/RedeemJwtPayloadType.ts b/shared/src/jwt/payloadtypes/RedeemJwtPayloadType.ts
similarity index 96%
rename from core/src/auth/jwt/payloadtypes/RedeemJwtPayloadType.ts
rename to shared/src/jwt/payloadtypes/RedeemJwtPayloadType.ts
index 7cc6674e7..faeda2b71 100644
--- a/core/src/auth/jwt/payloadtypes/RedeemJwtPayloadType.ts
+++ b/shared/src/jwt/payloadtypes/RedeemJwtPayloadType.ts
@@ -1,4 +1,3 @@
-// import { JWTPayload } from 'jose'
 import { JwtPayloadType } from './JwtPayloadType'
 
 export class RedeemJwtPayloadType extends JwtPayloadType {