| Component | Description | |-----------|-------------| | | Magic bytes, version (e.g., v5), and file size. | | Signer Info | Certificate chain or public key hash of the authorized signer (Transsion/Infinix). | | Challenge-Response Data | Precomputed responses to BootROM nonces. | | Chipset Compatibility | List of supported SoCs (Helio G85, G99, etc.) and hardware codes. | | DA Digest | Hash of the authorized Download Agent binary ( MTK_All_Infinix_DA.bin ). | | Anti-Rollback Counter | Prevents usage of older, potentially vulnerable auth files. |
Many newer Infinix models use "SLA" (Service Level Authentication) which can be difficult to bypass with just a file. Many users now use to disable the protection entirely before flashing: Infinix MTK DA Auth File
The primary goals of the DA Auth mechanism are: | Component | Description | |-----------|-------------| | |
What does this mean for you?
| Factor | Detail | |--------|--------| | | Leaked or officially obtained from Infinix service centers, GSM forums (e.g., auth_sv5.auth from AndroidMultiTools), or pay-per-use servers (CM2, MCT, etc.). | | Compatibility | Infinix models (Hot, Note, Zero, Smart series) with MT6761, MT6765, MT6768, MT6781, MT6833, MT6877, etc. | | DA File Pairing | Requires matching DA file: MTK_All_Infinix_DA.bin signed by Transsion. | | Tool Support | SP Flash Tool v5.x+, Miracle Box, CM2MTK, MRT, Easy JTAG, and custom loaders. | | Security Evolution | Newer Infinix phones (2023+) use MTK Secure Boot + DA Auth v6 , making unauthorized flash nearly impossible. | | | Chipset Compatibility | List of supported