# Security Audits

## Protocol Upgrades

#### Defense by Thesis - Beta Staker Allowlist & Bridge Fee Rebates

* **Date:** 27 November 2025
* **Report:** [View Audit 1 PDF](https://drive.google.com/file/d/1ymBpfc9vihOVA-XccqhpeitnZS208O5u/view) - [View Audit 2 PDF](https://drive.google.com/file/d/1QK1jnaoqdtoeyqTD7xz93sSk1BwerFwe/view?usp=sharing) 
* **Scope:** Smart contracts for T staking rebates. See related proposals, [TIP-067](https://forum.threshold.network/t/beta-staker-expansion-tip-067-compensation-adjustment/1113) and [TIP-106](https://forum.threshold.network/t/tip-106-experimenting-with-a-tbtc-fee-rebate-for-locking-t-tokens/1146) 

#### **Defense by Thesis - WalletRegistry & EcdsaDkg**

* **Date**: 5 November 2025
* **Report**: [View PDF](https://drive.google.com/file/d/1oQJO-fW4ZUUS_DQovOtaB9CB7U6YT0AP/view?usp=sharing)
* **Scope:** WalletRegistry and EcdsaDkg smart contracts

#### **Defense by Thesis - Gasless Minting Feature for the Threshold App**

* **Date**: 31 Oct 2025
* **Report**: [View PDF](https://drive.google.com/file/d/1RW4Bb3Rd_HdOU8pVxLpIRXCXDYKubeIp/view?usp=sharing)
* **Scope:** NativeBTCDepositor contract

## Cross-Chain Integrations

#### Certora - Threshold CCIP Update

* **Date:** 25 Sept 2025
* **Report:** [View PDF](https://drive.google.com/file/d/1Sxc5qx69qQtqdy7AtscoAHyGaSyqyYJM/view?usp=sharing)
* **Scope:** Threshold CCIP Update

#### MixBytes() - Cross-Chain Redemptions

* **Date:** 08 Sept 2025
* **Report:** [View PDF](https://drive.google.com/file/d/1rbVYly_VuW6LdAwhpbgxO8DpNiBn-6Vk/view?usp=sharing)
* **Scope:** Cross-chain bridge transfers

#### Zellic – Sui Integration (tBTC)

* **Date:** 01 May 2025
* **Report:** [View PDF](https://www.notion.so/threshold-labs/tBTC-Direct-Minting-Audit-Reports-1ec45959b48e8008ab0fe7b20a130760?source=copy_link#1f345959b48e8033a1cfffe4ab1922e1)
* **Scope:** tBTC integration with the Sui blockchain

#### Hashlock – Starknet Integration (tBTC)

* **Date:** April 2025
* **Report:** [View PDF](https://www.notion.so/threshold-labs/tBTC-Direct-Minting-Audit-Reports-1ec45959b48e8008ab0fe7b20a130760?source=copy_link#1f345959b48e80bba0cbccff21d5bf7b)
* **Scope:** tBTC integration with the StarkNet blockchain

#### **Thesis Defense – Base Integration (tBTC)**

* **Date:** April 11th, 2024
* **Report:** [View PDF](https://github.com/Thesis-Defense/Security-Audit-Reports/blob/main/PDFs/240411_Thesis_Defense-Threshold_tBTC_Base_Smart_Contracts_Security_Audit_Report.pdf)
* **Scope:** tBTC integration with the Base blockchain

## tBTC Bridge Audits

#### Least Authority – Solana Smart Contracts (tBTC)

* **Date:** 29 August 2023
* **Report:** [View Audit PDF](https://leastauthority.com/blog/audits/audit-of-keep-network-solana-smart-contracts/) - [Link to Least Authority](https://leastauthority.com/blog/audits/audit-of-keep-network-solana-smart-contracts/)
* **Scope:** Smart contracts for the tBTC Bridge on Solana

#### Least Authority – tBTC Bridge

* **Date:** 29 September 2022
* **Report:** [View Audit PDF](https://github.com/threshold-network/security-audits/blob/main/29-Sep-2022-LeastAuthority.pdf) - [Link to Least Authority](https://leastauthority.com/blog/audits/audit-of-keep-network-tbtc-bridge-v2/)
* **Scope:** Security audit of the core tBTC Bridge contracts

### T Vending Machine Audits

#### CertiK – Vending Machine

* **Date:** 19 November 2021
* **Report:** [View Audit PDF](https://github.com/threshold-network/security-audits/blob/main/19-Nov-2021-CertiK.pdf) - [Link to CertiK](https://www.certik.com/projects/threshold-network)
* **Scope:** Vending machine security audit

#### ChainSecurity – Staking, T Token, and Vending Machine

* **Date:** 09 November 2021
* **Report:** [View Audit PDF](https://github.com/threshold-network/security-audits/blob/main/09-Nov-2021-ChainSecurity.pdf) - [Link to ChainSecurity](https://chainsecurity.com/security-audit/threshold-network)
* **Scope:** Staking contracts, T token logic, and vending machine mechanisms