Title:
複数のステップサイズによる鍵ラチェットのための技法
Document Type and Number:
Japanese Patent JP7030128
Kind Code:
B2
Abstract:
Techniques are described for key ratcheting with multiple steps. In one embodiment, an apparatus may include a messaging component operative to receive an encrypted message, the encrypted message encrypted according to a multi-dimensional ratcheting encryption scheme; determining a message iteration count for the encrypted message; and generate a decrypted message by decrypting the encrypted message based on the decryption key; and a key management component operative on the processor circuit to decompose the message iteration count into a plurality of message chain key iteration counts; and determining a decryption key based on the plurality of message chain key iteration counts. Other embodiments are described and claimed.
Inventors:
Königsberg, Derek Alan
Nuffman, George
Yuen, Chun Win
Clet, Aalen Andrew
Nuffman, George
Yuen, Chun Win
Clet, Aalen Andrew
Application Number:
JP2019539881A
Publication Date:
March 04, 2022
Filing Date:
July 17, 2017
Export Citation:
Assignee:
WhatsApp LLC
International Classes:
H04L9/16; G06F21/62
Domestic Patent References:
| JP2016100632A | ||||
| JP2017038143A |
Foreign References:
| WO2007046376A1 |
Other References:
MARLINSPIKE, M. et al.,The Double Ratchet Algorithm,2016年11月20日,pp.1-35,[令和3年5月14日検索],インターネット
Attorney, Agent or Firm:
Patent Business Corporation World IP