Prior art

I am unable to directly search the USPTO database or extract specific citation lists from live web pages like Google Patents within this environment. The provided patent text for US11233780B2 does not contain a dedicated "Prior Art Documents" or "Citations" section that lists the individual patent references and their details.

Therefore, I cannot provide the full citation, publication/filing date, brief description, and specific claims potentially anticipated under 35 U.S.C. § 102 for each prior art reference, as this information is not available in the provided context.

However, based on the provided patent text, I can infer the general technical area and some of the problems that US11233780 aims to address, which implicitly defines the landscape of the prior art it seeks to improve upon. The patent US11233780, titled "Embedded universal integrated circuit card supporting two-factor authentication," discusses the challenges with traditional Subscriber Identity Module (SIM) cards and Universal Integrated Circuit Cards (UICCs) in the context of machine-to-machine (M2M) communications and the Internet of Things (IoT).

The patent identifies the following issues with prior art related to physical UICCs:

• Difficulty in reaching remote modules for physical UICC replacement: Modules may be in inaccessible locations (e.g., shipping containers), making physical swapping expensive or difficult.
• Preference for hermetically sealed modules: Manufacturers or service providers may want modules to be sealed to prevent tampering, which conflicts with replaceable physical UICCs.
• Prohibitive cost of swapping UICCs for roaming: Modules moving between countries might benefit from different operators' UICCs for cost efficiency, but physical swapping is expensive.
• Security limitations of electronically transferred keys: While embedded UICCs (eUICCs) solve physical media issues, securely and efficiently transferring new network access credentials (like IMSI and network key K) remains a challenge. The security of the electronically transferred key K is only as strong as the encryption of the transfer channel and the security of the keys used for that channel, which may be outside the control of the Mobile Network Operator (MNO).
• Need for key rotation: The extended use of a single key K poses a security risk, and the prior art involving physical UICCs makes periodic key changes difficult and costly.

The invention of US11233780 aims to address these challenges by providing methods and systems for an eUICC that supports two-factor authentication and allows for secure, remote management of network access credentials, including the rotation of secret keys (Key K), without requiring physical intervention.