PAKE Protocol with OTP Expiration for Brute Force Resistance
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Solution Overview
Problem
Existing methods for secure data exchange between individuals lack effective identity verification and protection against brute force attacks, especially in end-to-end encrypted communication scenarios.
Innovation Solution
A Password Authenticated Key Exchange (PAKE) protocol using a simple password, such as a four-digit code or memorable word, that expires after use, combined with a One Time Password (OTP) sequence generator, to establish a secure communication channel and prevent repeated guessing attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a simple password is used for authentication, then ease of operation is improved, but security against brute force attacks deteriorates
Solution Approach 1:
The system performs preliminary actions by establishing a secure PAKE protocol before actual data transfer, and by implementing one-time password expiration to prevent reuse. The device prepares authentication state in advance, validating passwords only once per session, which prevents attackers from performing repeated brute force attempts on the same password.
2Reliability
If password expiration is implemented, then security is improved, but device complexity increases
Solution Approach 1:
The authentication system is segmented into distinct components: the PAKE protocol for initial authentication, the one-time password expiration mechanism for preventing reuse, and the push notification system for user alerts. Each component operates independently but coordinates through standardized interfaces, making the overall system manageable despite its enhanced security features.
3Ease of operation
If push notification triggering is used, then ease of operation is improved, but loss of time occurs during device wake-up
Solution Approach 1:
The device maintains a preliminary ready state by running as a background service and registering for push notifications, so it can be quickly activated when needed. This preliminary preparation eliminates the need for full device wake-up and manual user interaction, reducing connection establishment time while maintaining automatic activation capability.
Data Source
AI summary
This invention enables asynchronous encrypted communication under a protection of a simple password which must be communicated out-of-band. The password is easily communicable in-person, by telephone or by a text message. The invention assumes that one of the parties has an online device, such as a smartphone. After the encrypted session has been established, it can be used for a variety of cryptographic applications, such as encrypting or decrypting messages, sharing of cryptographic keys, and verifying data. The invention also has the secondary benefit of authenticating both parties to each other.