JP7391860B2 - トランザクション確認及び暗号通貨のためのセキュアな鍵記憶装置の拡張 - Google Patents
トランザクション確認及び暗号通貨のためのセキュアな鍵記憶装置の拡張 Download PDFInfo
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Description
A.非侵襲型のプライバシー保護認証
B.適応的認証技術
C.複合認証部
1.暗号化認証鍵の記憶及び使用
2.暗号化認証鍵の生成、記憶及び使用
3.ローカルユーザ検証又はユーザの存在の検証
4.エンドユーザについての情報のセキュア表示
1.証明鍵が以下を確実にする:(a)FIDO認証によって生成されて保護された認証鍵を証明するためにのみ使用される及び(b)FIDO認証境界を離れることはない。
2.ローカルユーザ検証(「ユーザ認証」とも呼ばれることもある)がサポートされるように請求されている場合、(a)認証がソフトウェアアプリケーション(例えば、認証部にPINを「入力する」マルウェア)によってバイパス/偽造されることができないことを確実にする。(b)認証データの機密性は保護されている(例えば、マルウェアは、ユーザ又は参照データのいずれによっても入力されたピンにアクセスすることができない)、及び(c)ユーザ認証は、新たな認証鍵を生成する前及びそのような認証鍵を使用する前の到達時間の前に必要とされる。
1.セキュリティ対策(SM)1:1つの実施形態において、各構成要素(例えば、図12~13に示されるユーザ検証構成要素1210、表示構成要素1212又は認証カーネル1214)は、他の構成要素に登録して他の構成要素に送信されるメッセージを認証するために(潜在的に相互に)使用されるそれ自身の「構成要素認証鍵」対(CAK)(例えば、それぞれCAK対1304、1305及び1306)を有する。図13に示されるように、各構成要素1210、1212、1214は、それぞれCAK対1304、1305、1306を使用して、構成要素間の認証トランザクションに入るために、それぞれ、構成要素の認証ロジック1301、1302、1303を含む。1つの実施形態において、本発明の基本原理は、そのような実装に限定されるものではないが、CAK対1304、1305、1306は、公開/秘密鍵対である。この実装において、構成要素のそれぞれは、それが認証する必要のあるこれらの構成要素の公開鍵を備えている。例えば、UVC1210は、DC及びAKの公開鍵(又は、少なくとも公開鍵を検証することができる)1321を知っており、DC1212は、UVC及びAKの公開鍵1321を知っており、AK1214は、DC及びUVCの公開鍵を知っている。1つの実施形態において、起動時に、構成要素は、これらの構成要素とその公開鍵を共有することによって通信する必要のある他の構成要素の登録トランザクションに最初に入る。そして、以下に記載される技術を使用してこれらの構成要素を使用して認証することができる。
2.セキュリティ対策(SM)2:各構成要素は、これらの構成要素の公開CAKを検証することによってメッセージを受信する他の構成要素を認証することが可能である。例えば、図13において、AK1214は、全てのUVC1210及びDC1212の公開CAKを検証することができ、それは(すなわち、CAK対1304及び1305における公開鍵)をサポートしている。UVC及びDCはまた、相互認証が実装されている場合、AK1214の公開CAK(すなわち、CAK対1306)を検証することができる。
3.セキュリティ対策(SM)3:特定の実装に応じて、追加のセキュリティ機構は、構成要素間の通信を保護するために利用することができる。補足ハードウェア/ソフトウェア保護機構1310としてこれらの追加のセキュリティ機構が図13に図示されている。例示として、限定されるものではないが、例を挙げると、これらのハードウェア/ソフトウェア保護機構1310は、セキュア要素(SE)、信頼技術のチェーン、信頼できるユーザインターフェース技術、OSレベルのアクセス制御機構、ホワイトボックス暗号化、コード難読化及び実行の完全性保護などのクライアントプラットフォームに組み込まれたそれらの機構を含むことができる。ARM(登録商標)TrustZone(商標)又は類似の技術を使用して、例えば、オペレーティングシステムは、(例えば、正当UVC及びDCなどの)信頼できるプログラムのみに対するAKのアプリケーションプログラミングインターフェース(API)へのアクセスを制限することができる。他の例として、オペレーティングシステムはまた、AKに対する任意のAPI呼び出しに対してUVC又はDCのパッケージ識別子を追加することができる。しかしながら、本発明の基本原理は、上述した特定のハードウェア/ソフトウェア保護機構に限定されないことに留意すべきである。
静的複合認証部
1.各認証部1501について、信頼できる当事者1320は、(公開「構成要素認証鍵」(CAK)1304、1306ではなく証明鍵対215に対応する)公開証明鍵に対するアクセスを有する/必要がある;及び鍵
2.構成要素(例えば、UVC、DC及びAK)の各サポートされた組み合わせについて、特定の認証部証明ID(AAID)1505が事前に指定されている。
動的複合認証部
1.信頼できる当事者1320が(例えば、OSTP仕様において「鍵登録データ」と称される)証明メッセージを検証するために関連する公開鍵を有し且つ必要とするように、「構成要素認証鍵」(CAK)1604、1604が証明鍵として処理される場合;及び且つ
2.信頼できる当事者1320が(認証部1601内の構成要素の数に応じた)複数のAAID1602、1603を受信する場合。1つの実施形態において、それは、セキュアトランザクションロジック1620及びブラウザ/アプリケーション1610を介してAK1614から送信された登録メッセージの一部として認証部1601の全ての構成要素1610、1614のAAID1602、1306を受信する。図16は、UVC1610及びAK1614のみを図示しているが、(図3に示されるような)代替実施形態は、AK、DC及びUVCについてのAAIDをRP1320に送信する。上述したように、しかしながら、本発明の基本原理は、認証を実現するための構成要素の任意の特定のセットに限定されるものではない。1つの実施形態において、RP1320に送信された登録メッセージはまた、複数の(連鎖した)署名、AKの証明鍵1605を有するもの及び他の構成要素(例えば、UVCの証明鍵1604及びDCの証明鍵(図示しない))のそれぞれについてのものを有する。上述したように、1つの実施形態において、AK1614は、他の構成要素との通信を信頼する場合にのみRP1320に対する独自の証明メッセージ内に他の構成要素の証明メッセージを含む。
UVC/DC証明検証
1.許容可能な公開CAKのリストを含む内部信頼ストアを検索する。公開CAKは、信頼ストアに直接記憶されてもよく又は信頼ストアにおいてルート証明書に連鎖するCAKのそれぞれについての公開鍵証明書であってもよい。
2.AKは、(例えば、SM1及びSM2に関して上述したように)公開CAKを使用してUVC及び/又はDCからの入力データの署名を検証する。
3.入力データのパッケージID又は類似のプラットフォームに提供された保護機構を使用するなどの追加のプラットフォーム固有の保護機構を検査する。
4.UVC又はDCの公開CAKを含む証明書の失効状態を検査する。AKは、証明書/鍵(すなわち、現在のUVC又はDCの)の非常に少数の失効情報にのみ関心があるため、(上述した)オンライン証明書状態プロトコル(OCSP)は、失効検査のために使用することができる。AKは、ネットワーク接続を有すると仮定されておらず、そのため、OCSP応答は、UVC及び/又はDCからの入力データの一部として予測される。
最適化された検証方法
D.位置認識認証技術
E.補足センサ及び/又は位置データを使用した位置確認についての実施形態
F.クライアント認証機能に基づく認証ポリシーの適応的応用
G.認証時における眼追跡のためのシステム及び方法
1.データドリブン特性評価
a.静止画像
i.2次元フーリエスペクトルを分析する再スキャン画像によって解像度の低下を検出する(参考文献13)
ii.画像プリントに対する実際の顔の異なる反射特性を利用する。この理論は、ランバート反射特性に基づいている(参考文献14)
iii.印刷欠陥に起因する実際の顔と画像プリントの異なるマイクロテクスチャを利用する(参考文献15)
iv.他の方法と組み合わせて印刷された画像における品質劣化やノイズ付加を利用する(参考文献16)
b.映像
v.各カメラセンサは、独自の特性を有し、モニタに表示された映像の再キャプチャは、アーチファクトを引き起こす。これは、なりすましを検出するために使用することができる(参考文献12)。
vi.画像によるなりすましの場合、顔背景依存性がある(参考文献17)。
vii.なりすまし攻撃の場合、顔は、通常、より多くの剛体運動を示す(参考文献18)。
c.静止画像及び動画像の組み合わせ(参考文献12)
2.ユーザ行動モデリング(参考文献12)
3.ユーザ相互作用のニーズ(参考文献12)。
4.追加装置(参考文献12)
テクスチャの違い
可視光の代わりの赤外線
オプティカルフローベースの方法
静止画像の代わりの動画像
チャレンジレスポンス方法
生体認証のコンテキストにおいて、チャレンジ応答は、以下のように定義される:
(National Science & Technology Council's Subcommittee on Biometrics )(国立科学技術会議の生体認証小委員会)
マルチモーダルシステム
1)成功裏に単一の形質を偽装するシステムは、システム全体を偽装するのに十分である。小さなFRRのためのマルチモーダルシステムの最適化は、通常、そのような結果をもたらす。
2)以下のシステム:
a)複数の形質が成功裏にシステム全体を偽装するために偽装されなければならない;及び、
b)このマルチモーダルシステム内の任意の1つの形質を偽装することは、単一のモーダルシステムにおいて同じ形質を偽装するよりも複雑ではない。
3)以下のシステム:
a)複数の形質が成功裏にシステム全体を偽装するために偽装されなければならない;及び、
b)このマルチモーダルシステム内のいずれかの形質を偽装することは、単一のモーダルシステムにおいて同じ形質を偽装するよりも複雑である。以下に記載される本発明の実施形態は、このカテゴリに入る。
H.認証時にリスク評価のためのクライアントデータを収集して利用するためのシステム及び方法
I.ローカルトランザクションの認証を行うためのシステム及び方法
J.オンライントランザクションのためのユーザ確認
図37を参照すると、1つの実施形態において、認証は、各ユーザをリモート認証するために信頼できる当事者3650によって一連のトランザクションを実行するように設計されたクライアント装置3600-3602における認証エンジン3710を介して行うことができる。例えば、同時係属出願に記載されるように、認証フレームワーク及び関連する認証技術が使用されることができ、ユーザは、(例えば、指スワイプ、画像スナップ、音声記録などによって)クライアントの生体認証装置3720-3721に登録して生体認証テンプレートデータを生成し、生体認証装置をネットワーク(例えば、セキュアトランザクションサービスが装備されたウェブサイト又は他の信頼できる当事者)にわたって1つ以上の信頼できる当事者3650に登録し、その後、登録プロセス中に交換されるデータ(例えば、生体認証装置内にプロビジョニングされる暗号化鍵)を使用して、それらの信頼できる当事者3650によって認証する。1つの実施形態において、信頼できる当事者による「登録」は、各ユーザ認証装置3720-3721について信頼できる当事者と対称又は非対称鍵を交換し、各認証装置3720-3721に関連したセキュア記憶装置3725内に鍵を記憶することを含む。動的対称鍵プロビジョニングプロトコル(DSKPP)などのセキュア鍵プロビジョニングプロトコルはセキュア通信チャンネルを介してクライアントと鍵を共有するために使用することができる(例えば、コメントについての要求(RFC)6063を参照)。しかしながら、本発明の基本原理は、いかなる特定の鍵プロビジョニングプロトコルにも限定されるものではない。
K.信頼を委任するためのシステム及び方法
1.信頼できる当事者に関連した新たな装置公開鍵にわたる証明(ND_Uauth.pub)。1つの実施形態において、証明は、(例えば、信頼できる当事者の公開鍵を使用して)公開鍵にわたって生成された署名を含む。
2.信頼できる当事者に関連した新たな装置秘密鍵を使用した証明(ND_Uauth.priv)。1つの実施形態において、証明を生成するために、秘密鍵は、(例えば、信頼できる当事者から送信されたランダムチャレンジなどの)信頼できる当事者によって公知のコンテンツにわたって署名を生成するために使用される。信頼できる当事者は、(ステップ1において)公開鍵を備えているので、コンテンツを復号することができ、それによって秘密鍵がコンテンツを暗号化するために使用されたことを確認する。
3.(例えば、公開鍵を取得するためにそのセキュアトランザクションデータベース4025をクエリするために鍵IDを使用することができるように)公開鍵を配置するために信頼できるクライアント装置によって以前に生成され且つ信頼できる当事者で使用される鍵ID(TD_Uauth.keyid)とともにこの特定の信頼できる当事者のための新たな装置公開鍵に関連付けられた署名(TD_Uauth.sig)。
1.鍵IDを使用して信頼できる装置の公開鍵(TD_Uauth.pub)を配置する。
2.信頼できる装置の公開鍵(TD_Uauth.pub)を使用して信頼できる装置によって生成された署名(TD_Uauth.sig)を検証する。
3.新たな装置の公開鍵(ND_Uauth.pub)を使用して新たな装置の秘密鍵によって生成された署名(ND_Uauth.sig)を検証する。且つ
4.信頼できる当事者に関連した新たな装置公開鍵(ND_Uauth.pub)にわたって証明を検証する。1つの実施形態において、この検証は、信頼できる当事者の秘密鍵を使用して実行される。
L.プライバシー強化データ同期のためのシステム及び方法
a.サークルに参加
・HMAC(sk.sym,d2.pub|T)|d2.pub|T。ここで、Tはタイムスタンプである。
・trust-block1=S(d2.priv,d1.pub)|d1.pub|d2.pub。
HMACは、ハッシュベースのメッセージ認証コードの略であることに留意されたい。上記実施形態において、HMACは、タイムスタンプと装置4302の公開鍵を連結し、HMAC又は類似のアルゴリズムを使用してsk.symによって結果の完全性を保護することによって生成される。更に、trust-block1は、装置4301の公開鍵にわたる装置4302の秘密鍵で生成された署名を含む。1つの実施形態において、trust-block1エントリはまた、タイムスタンプ(T)を含む。
b.サークルとの同期
{d1.pub,di.pub,E(SKi,REK)}(装置diについて)
{d1.pub,dj.pub,E(SKj,REK)}(装置djについて)
処理の終了時に、装置di及びdjのそれぞれは、(上述したようにDiffie-Hellmanを使用して各装置によって独立して導出された)それぞれのセッション鍵を使用してREKを復号することができる。
[{d1.pub,di.pub,E(SKi,REK)},{d1.pub,dj.pub,E(SKj,REK)},・・・]
E(REK,同期されるデータ)
・装置が他の装置を認証するための公開鍵及び秘密鍵を有する装置同期プロトコルを実装するためのシステム及び方法。
・同じサークル内の装置間の信頼関係を示すために信頼チェーンを実装するためのシステム及び方法。
・相互セッション鍵及びこれらの鍵によって暗号化データを生成するために装置がDiffie-Hellman又は類似の鍵交換アルゴリズムを使用するためのシステム及び方法。
・circle-idのハッシュが装置自体の代わりにサークルクラウドに記憶されているシステム及び方法。
・サークルクラウドがサークルのサークルチャンネル内にデータを置くのを許容する前に装置を認証するためにチャレンジレスポンスプロトコルを使用するシステム及び方法。
・持続的なサークルグループ鍵が同期データを暗号化するために使用されるシステム及び方法。
・複数の装置間でユーザのデータ(文書、ファイル、写真など)を共有するために記載されたプライベート同期プロトコルを使用し、クラウド上のデータの暗号化されたバックアップを記憶するアプリケーション。
・装置の秘密鍵(d.priv)及びこの鍵を使用する全ての動作がネットワークを介してユーザをリモート認証するために認証部内に実装されたシステム及び方法。
・ユーザの装置間で認証部の登録を共有するために新たな装置に対してユーザ制御の信頼委任を実行するために本発明の実施形態と組み合わせて記載されたプライベート同期プロトコルを使用するアプリケーション。
・新規登録が他の装置に委任されるたびにユーザが認証部によって認証する必要はない、ユーザの装置間の新規登録を共有するために新たな装置に対してユーザ制御の信頼委任を行うために本発明の実施形態と組み合わせて記載されたプライベート同期プロトコルを使用するアプリケーション。
・これらの認証部が同じサークルに属する他の認証部による単一の認証部の登録を共有するように認証鍵対を同期させるために、上述したプライベート同期プロトコルを使用している、同じユーザに属し且つサークルを形成する認証部のセット。
M.例示的なシステムアーキテクチャ
セキュアクエリのためのシステム及び方法
クライアント認証機能を判定するためのポリシー
複数の認証装置によって効率的に登録、登録、
及び認証するためのシステム及び方法
認証フレームワーク内でランダムチャレンジを処理するためのシステム及び方法
認証フレームワーク内でプライバシークラスを処理するためのシステム及び方法
トランザクション署名を使用して認証フレームワークをインプラントするためのシステム及び方法
カノニカル認証システム
1.暗号化鍵を生成し、そのような鍵をリモートパーティに証明するためのハードウェア及び/又はソフトウェア。
2.試験された署名を生成するためのハードウェア及び/又はソフトウェア。
3.ユーザを検証するためのハードウェア及び/又はソフトウェア。
4.エンティティに鍵をバインドする(例えば、定義されたソフトウェアアプリケーションのセットへのそのような鍵の「使用」アクセスを制限する)ハードウェア及び/又はソフトウェア。
(1)(i)暗号化鍵ペア(「認証鍵」)を生成する回路及び/又はプログラムコードと、(ii)鍵生成エンティティの識別情報をリモート当事者に証明する回路及び/又はプログラムコードと、を含む、クライアント側認証部。
(2)リモート当事者に利用可能に作成された証明を検証するために十分な情報を少なくとも含む、認証部に関するデータ。このデータは、上記「メタデータ」と称される。
(3)生成された認証秘密鍵を使用して暗号化動作を実行して、秘密認証鍵を所有することをリモート当事者に証明するための暗号化動作を実行する回路及び/又はプログラムコード。
トランザクション確認及び暗号通貨実装のためのセキュアな鍵ストアを使用するシステム及び方法
htpps://pdfs.semanticscholar.org/15ce/5b7ae2118cb1ab47b66392e0a565ae969f43.pdf
http://www.sciencedirect.com/science/article/pii/S0167404898800058
htpps://pdfs.semanticscholar.org/b52c/726fabe56bb7f929e8c6b11112afd78db359.pdf
htpps://fidoalliance.org/specs/fido-v2.0-rd-20170927/fido-client-to-authenticator-protocol-v2.0-rd-20170927.html(Client-to-Authプロトコル、V2.0)
htpps://www.w3.org/TR/webauthn(ウェブ認証仕様)
htpps://tools.ietf.org/html/rfc7049(RFC7049、「CBOR」)
KM_DIGEST_WEBAUTHN_SHA256
FIDO及びウェブ認証の仮想RP ID
これらのシナリオにおけるユーザの秘密鍵の改善された保護を提供するために、本発明の1つの実施形態は、そのようなブロックチェーン概念に対する認証のために、認証部、認証部証明書及びメタデータステートメントを導入する。具体的には、1つの実施形態では、「ブロックチェーン認証部」は、上述の認証部(FIDO認証部を含む)と同様の方法で使用されるが、(FIDOアサーションなどのアサーションに加えて)特定のブロックチェーンメッセージを署名するための追加のサポートとともに使用される。
例示的なデータ処理デバイス
Claims (18)
- システムであって、
1つ以上の秘密鍵をセキュアに記憶するためのクライアント装置上の認証部であって、前記秘密鍵のうちの少なくとも1つが、ブロックチェーンのブロックを認証するために使用可能であり、前記認証部は前記秘密鍵のうちの前記少なくとも1つの排他的制御を付与される、認証部と、
前記認証部の証明モジュール、又は前記認証部に結合された証明モジュールであって、前記証明モジュールが、前記ブロック、前記認証部のファームウェアバージョンを含む前記認証部の1つ以上の証明された属性及び署名を含む署名オブジェクトを生成し、前記署名は前記秘密鍵を用いて前記1つ以上の認証された証明及び前記ブロックの連結を署名することによって前記証明モジュールによって生成され、前記署名が、前記秘密鍵に対応する公開鍵を用いて前記ブロック及び前記1つ以上の証明された属性の真正性を証明するために使用可能である、証明モジュールと、を備える、システム。 - 前記ブロックが、暗号通貨システムにおける通貨及び/又はトランザクションを表し、前記通貨が、前記公開鍵を使用して信頼できる当事者によって認証される、請求項1に記載のシステム。
- 前記暗号通貨システムが、ビットコイン暗号システムを含む、請求項2に記載のシステム。
- 更に、鍵ペア生成を実行するために前記認証部と一体である鍵生成回路/ロジックであって、前記鍵生成回路/ロジックが、前記認証部内で確実に保護される、鍵生成回路/ロジック、を備える、請求項1に記載のシステム。
- 前記認証部が、前記クライアント装置のユーザのアイデンティティを認証するためのユーザ認証回路/ロジックを備える、請求項4に記載のシステム。
- 前記認証部が、前記ユーザを検証するために生体データを読み取るための1つ以上の生体認証センサを含むか、又はそれと通信可能に結合される、請求項5に記載のシステム。
- 前記生体認証センサが、指紋センサ、マイクロフォン、及び/又はカメラを含む、請求項6に記載のシステム。
- 前記認証部が、埋め込まれたセキュアエレメント、信頼されたプラットフォームモジュール、又は信頼できる実行環境内に前記秘密鍵をセキュアに記憶することである、請求項1に記載のシステム。
- 前記秘密鍵が、公開/秘密鍵ペアのうちの秘密鍵である、前記公開鍵が信頼できる当事者に記憶されている、請求項1に記載のシステム。
- ユーザを認証する要求に応答して1つ以上の画面レイアウトが表示される時に、前記ユーザの眼を含む画像のシーケンスを捕捉するカメラと、
前記1つ以上の画面レイアウトが提示されたときの前記ユーザの眼の動きと前記1つ以上の画面レイアウトが提示されたときの予測される前記ユーザの眼の動きとの間の相関を特定するために前記画像のシーケンスにわたって眼運動検出を行う眼追跡モジュールと、を更に備える、請求項7に記載のシステム。 - 前記ユーザの声の捕捉された音声と1つ以上の声紋との間の相関を判定する音声認識技術を実行する音声認識モジュールを更に備える、請求項7に記載のシステム。
- 顔認識を実行して、前記ユーザの顔の1つ以上の画像と前記ユーザに関連付けられた顔テンプレートデータとの間の相関を特定する顔認識エンジンを更に備える、請求項7に記載のシステム。
- (a)前記ユーザの顔の画像と前記ユーザに関連付けられた顔テンプレートデータとの間の相関、(b)前記ユーザの眼の動きと提示される前記1つ以上の画面レイアウトとしての前記ユーザの眼の予想される動きとの間の相関、及び(c)前記ユーザの声の捕捉された音声と前記1つ以上の声紋との間の相関、のうちの1つ以上に基づいて保証レベルを生成する認証エンジンを更に備える、請求項12に記載のシステム。
- 前記証明モジュールが、前記暗号通貨システムに適用される暗号通貨トランザクションに関する署名を生成するように構成される、請求項2に記載のシステム。
- 前記認証部が、前記暗号通貨トランザクションを続行するために前記クライアント装置のユーザからの認証を受信する前に、前記暗号通貨トランザクションに関連するトランザクションテキストを表示するセキュアトランザクション回路/ロジックを含む、請求項14に記載のシステム。
- 前記署名が前記ブロックチェーンの一部として、又は前記ブロックチェーンとは別個に公開される、公的に読み取り可能な記憶装置を更に備える、請求項1に記載のシステム。
- 認証部モデルに関連する認証部メタデータを記憶するためのメタデータ記憶装置であって、前記メタデータ記憶装置が、前記認証部に関連するモデルデータを記憶する、メタデータ記憶装置を更に備える、請求項16に記載のシステム。
- 前記認証部メタデータが、台帳トランザクションに使用される特定の認証部特性(例えば、ビットコイン署名スクリプト、スマート契約など)を示すメタデータステートメントを含む、請求項17に記載のシステム。
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JP2016521403A (ja) | 2013-03-22 | 2016-07-21 | ノック ノック ラブズ, インコーポレイテッドNok Nok Labs, Inc. | 高度な認証技術及びその応用 |
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JP2021504860A (ja) | 2021-02-15 |
US11868995B2 (en) | 2024-01-09 |
EP3717998A1 (en) | 2020-10-07 |
EP3717998B1 (en) | 2024-05-01 |
US20190164156A1 (en) | 2019-05-30 |
KR20200092368A (ko) | 2020-08-03 |
JP2023171851A (ja) | 2023-12-05 |
US20240127235A1 (en) | 2024-04-18 |
CN111386514A (zh) | 2020-07-07 |
WO2019104323A1 (en) | 2019-05-31 |
KR102654886B1 (ko) | 2024-04-04 |
EP3717998A4 (en) | 2021-09-29 |
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