diff --git a/backend/package.json b/backend/package.json
index b80120cb0..ee7365b72 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -19,7 +19,6 @@
     "@types/jest": "^27.0.2",
     "apollo-server-express": "^2.25.2",
     "axios": "^0.21.1",
-    "bigint-conversion": "^2.2.1",
     "class-validator": "^0.13.1",
     "cors": "^2.8.5",
     "dotenv": "^10.0.0",
diff --git a/backend/src/graphql/resolver/UserResolver.ts b/backend/src/graphql/resolver/UserResolver.ts
index 1ff60d769..2f4fe93cf 100644
--- a/backend/src/graphql/resolver/UserResolver.ts
+++ b/backend/src/graphql/resolver/UserResolver.ts
@@ -40,8 +40,8 @@ import { LoginUserRepository } from '../../typeorm/repository/LoginUser'
 import { LoginUserBackupRepository } from '../../typeorm/repository/LoginUserBackup'
 import { LoginUser } from '@entity/LoginUser'
 import { LoginUserBackup } from '@entity/LoginUserBackup'
-import { bigintToBuf } from 'bigint-conversion'
 
+// TODO apparently the types are cannot be loaded correctly? IDK whats wrong and we have to use require
 // eslint-disable-next-line @typescript-eslint/no-var-requires
 const sodium = require('sodium-native')
 
@@ -117,7 +117,7 @@ const PassphraseGenerate = (): string[] => {
   ]
 */
 // pub:  0xdd1b7bb
-// priv: 0xbcadd66
+// priv: 0xbcadd66 (wrong?)
 
 const KeyPairEd25519Create = (passphrase: string[]): Buffer[] => {
   if (!passphrase.length || passphrase.length < PHRASE_WORD_COUNT) {
@@ -129,24 +129,27 @@ const KeyPairEd25519Create = (passphrase: string[]): Buffer[] => {
     wordIndicies.push(WORDS.indexOf(passphrase[i]))
   }
 
+  // eslint-disable-next-line no-console
+  console.log(wordIndicies)
   // TODO: wtf is this?
   // if (!wordIndicies || (!wordIndicies[0] && !wordIndicies[1] && !wordIndicies[2] && !wordIndicies[3])) {
   //	return null;
   // }
-  const state = Buffer.alloc(sodium.crypto_hash_sha512_STATEBYTES)
 
-  // sodium.crypto_hash_sha256_init(state /* , [key], outlen */)
+  const state = Buffer.alloc(sodium.crypto_hash_sha512_STATEBYTES)
   sodium.crypto_hash_sha512_init(state)
 
   // To prevent breaking existing passphrase-hash combinations word indices will be put into 64 Bit Variable to mimic first implementation of algorithms
   for (let i = 0; i < PHRASE_WORD_COUNT; i++) {
-    const value = BigInt(wordIndicies[i])
-    sodium.crypto_hash_sha512_update(state, Buffer.from(bigintToBuf(value))) // hash.update(Buffer.from(bigintToBuf(value)))
+    const value = Buffer.alloc(8)
+    value.writeBigInt64LE(BigInt(wordIndicies[i]))
+    sodium.crypto_hash_sha512_update(state, value)
   }
-  const clearPassphrase = passphrase.join(' ')
-  sodium.crypto_hash_sha512_update(state, Buffer.from(clearPassphrase)) // hash.update(Buffer.from(clearPassphrase))
+  // TODO trailing space in login_server
+  const clearPassphrase = passphrase.join(' ') + ' '
+  sodium.crypto_hash_sha512_update(state, Buffer.from(clearPassphrase))
   const outputHashBuffer = Buffer.alloc(sodium.crypto_hash_sha512_BYTES)
-  sodium.crypto_hash_sha512_final(state, outputHashBuffer) // hash.final(outputHashBuffer)
+  sodium.crypto_hash_sha512_final(state, outputHashBuffer)
 
   const pubKey = Buffer.alloc(sodium.crypto_sign_PUBLICKEYBYTES)
   const privKey = Buffer.alloc(sodium.crypto_sign_SECRETKEYBYTES)
@@ -154,7 +157,7 @@ const KeyPairEd25519Create = (passphrase: string[]): Buffer[] => {
   sodium.crypto_sign_seed_keypair(
     pubKey,
     privKey,
-    outputHashBuffer.slice(sodium.crypto_sign_SEEDBYTES),
+    outputHashBuffer.slice(0, sodium.crypto_sign_SEEDBYTES),
   )
 
   return [pubKey, privKey]
diff --git a/backend/yarn.lock b/backend/yarn.lock
index da6a37950..7cd146647 100644
--- a/backend/yarn.lock
+++ b/backend/yarn.lock
@@ -562,11 +562,6 @@
   resolved "https://registry.npmjs.org/@josephg/resolvable/-/resolvable-1.0.1.tgz"
   integrity sha512-CtzORUwWTTOTqfVtHaKRJ0I1kNQd1bpn3sUh8I3nJDVY+5/M/Oe1DnEWzPQvqq/xPIIkzzzIP7mfCoAjFRvDhg==
 
-"@juanelas/base64@^1.0.1":
-  version "1.0.1"
-  resolved "https://registry.yarnpkg.com/@juanelas/base64/-/base64-1.0.1.tgz#aaede00ffdca595741fc69d0008b4cfc8f08293a"
-  integrity sha512-ZK/wWrjMrrMcprtOV72iilC1M/HfZcF2JeUJPHOL0tMm1TZrh9UhHDQEdPny/MmmT7tO4w47ycuy0YTnBrS5fg==
-
 "@nodelib/fs.scandir@2.1.5":
   version "2.1.5"
   resolved "https://registry.npmjs.org/@nodelib/fs.scandir/-/fs.scandir-2.1.5.tgz"
@@ -1512,13 +1507,6 @@ base64-js@^1.3.1:
   resolved "https://registry.npmjs.org/base64-js/-/base64-js-1.5.1.tgz"
   integrity sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==
 
-bigint-conversion@^2.2.1:
-  version "2.2.1"
-  resolved "https://registry.yarnpkg.com/bigint-conversion/-/bigint-conversion-2.2.1.tgz#08c9f17a826943c7e56d4bfa9f0fc7fe8050a940"
-  integrity sha512-9TvqpV+VZ04fPKv4KPLQRk5ZAFhgHX4F7bYQY263/BbJBFzEGbtBeTQV9oNuAGaqj88PXdov1OcSNQtq9K9MPA==
-  dependencies:
-    "@juanelas/base64" "^1.0.1"
-
 binary-extensions@^2.0.0:
   version "2.2.0"
   resolved "https://registry.npmjs.org/binary-extensions/-/binary-extensions-2.2.0.tgz"