/en/tags/tips/ Recent content in Tips on Kirin's Backspace Hugo en © {year} Kirin Thu, 10 Oct 2024 23:50:00 +0800 /en/posts/dkey-token-to-standard-totp/ Fri, 27 May 2022 10:00:00 +0800 /en/posts/dkey-token-to-standard-totp/ What is TOTP? TOTP, short for Time-based One-Time Password, is a form of 2FA (two-factor authentication) that calculates a one-time password based on a pre-shared key and the current time. It generates dynamic 6-digit or 8-digit codes from a fixed secret. Both the user and the server hold the same secret, ideally only shared between them. This secret is a string of binary data that is base32 encoded for easier transmission, with the last = removed. /en/posts/solve-ipv6-issue-in-my-dorm/ Thu, 19 May 2022 10:00:00 +0800 /en/posts/solve-ipv6-issue-in-my-dorm/ Background My broadband ISP in my dormitory is China Unicom, FTTB. It is terrible that it has only 100Mbps connectivity (Fast Ethernet). But the most horrible thing is that the BRAS only assigned the IPv6 address by SLAAC, even can not assign PD prefix to my router. CU is the only ISP that provides PPPoE + IPv6 + public IPv4 in our university. Because of this, I didn’t change my mind to migrate my ISP