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Project Overview
TAC is a TON network extension that connects TON with EVM-compatible applications, creating a unified experience for users and developers. With TAC, you can interact with any EVM application using TON wallet - removing the complexity of managing multiple wallets or using external bridges.
Lombard Gradually Phasing Out LayerZero, Plans to Migrate Over $1 Billion in BTC Collateral Assets to Chainlink
following the $292 million exploit of Kelp DAO's LayerZero bridge, the security of cross-chain infrastructure has once again come under scrutiny. DeFi protocols Kelp DAO, Solv Protocol, Re, and crypto exchange Kraken have all taken similar migration measures, with the total value of this outflow reaching approximately $4 billion.Decentralized finance protocol Lombard has become the latest project to join the migration wave, announcing a gradual phase-out of LayerZero and the migration of over $1 billion in Bitcoin collateral assets to Chainlink's Cross-Chain Interoperability Protocol (CCIP). Bitcoin-related tokens issued by Lombard include LBTC and BTC.b. It is reported that Lombard's initial migration assets cover the Solana, Etherlink, Berachain, Corn, and TAC chains, while the use of LayerZero on Morph and Swell will also be terminated. As of now, LayerZero has not responded to requests for comment. (CoinDesk)
TAC: If Attacker Returns Approximately $2.8 Million in Assets, 10% White Hat Bounty Will Be Offered
the L1 blockchain TAC team stated they have confirmed a security incident on the cross-chain layer resulted in approximately $2.8 million in assets being transferred, involving assets such as USDT, BLUM, and tsTON.TAC stated that if the attacker returns the relevant funds to the designated multi-signature address, the team will consider this incident a "white hat rescue" and will not take legal action against the operator of the involved ETH/BSC, ZEC, and TON addresses.As a reward, the attacker can receive an approximately 10% bounty, equivalent to about 13 ETH and 300 ZEC.
TAC Cross-Chain Layer Attacked on TON Side, Suffering ~$2.8M Loss
TAC stated that its cross-chain layer on the TON side was exploited by external attackers, resulting in approximately $2.8 million in losses involving USDT, BLUM, and tsTON. TAC confirmed that the TAC token, TON, and all ERC-20 tokens bridged from Ethereum remain unaffected. The bridge has been temporarily suspended, and the team is conducting forensic analysis and implementing fixes. Additionally, the team plans to legally structure a sale of the foundation’s TAC token treasury reserves to restore bridge liquidity and compensate affected users. A post-mortem report and further details will be released within the next 48 hours.
OpenAI Launches GPT-5.5-Cyber and Deploys Trusted Access Framework for Cybersecurity
OpenAI has officially launched the GPT-5.5-Cyber model and the "Trusted Access for Cyber" (TAC) framework designed for cybersecurity defenders. Simultaneously, GPT-5.5-Cyber has been opened for a limited preview to defenders responsible for critical infrastructure, supporting specialized cybersecurity workflows.TAC is an identity and trust-based framework aimed at ensuring that enhanced AI capabilities are wielded by verified defenders. Defenders verified through this framework will encounter fewer instances of model refusal when performing tasks such as vulnerability identification, triage, malware analysis, binary reverse engineering, and patch verification. Starting from June 1, 2026, individual members accessing this capability will be required to enable advanced account security protection.OpenAI is currently collaborating with security vendors including Cisco, CrowdStrike, and Palo Alto Networks to accelerate the defense cycle of the security ecosystem through GPT-5.5, enhancing the efficiency of vulnerability research, patching, monitoring, and supply chain security.
Kelp to Discontinue rsETH Cross-Chain Support on 20 Networks
: Kelp posted on X platform, stating that to ensure the security standards of rsETH and optimize network integration, it will discontinue rsETH cross-chain support for multiple networks after June 15. The affected networks include Optimism, Manta, Mode, Blast, Scroll, X Layer, zkSync, Zircuit, Swellchain, Hemi, Berachain, Sonic, HyperEVM, Unichain, TAC, Avalanche, Plasma Stable, MegaETH, Monad, and Movement.Kelp reminds users holding rsETH on the aforementioned chains to bridge it back to the Ethereum mainnet before June 15. After the deadline, asset recovery can still be requested, but a fee of 100 USDC will be charged per address. Specific procedures will be announced closer to the deadline.
TAC Cross-Chain Layer Attacked on TON Side, Suffering ~$2.8M Loss
TAC stated that its cross-chain layer on the TON side was exploited by external attackers, resulting in approximately $2.8 million in losses involving USDT, BLUM, and tsTON. TAC confirmed that the TAC token, TON, and all ERC-20 tokens bridged from Ethereum remain unaffected. The bridge has been temporarily suspended, and the team is conducting forensic analysis and implementing fixes. Additionally, the team plans to legally structure a sale of the foundation’s TAC token treasury reserves to restore bridge liquidity and compensate affected users. A post-mortem report and further details will be released within the next 48 hours.
OpenAI Launches GPT-5.5-Cyber and Deploys Trusted Access Framework for Cybersecurity
OpenAI has officially launched the GPT-5.5-Cyber model and the "Trusted Access for Cyber" (TAC) framework designed for cybersecurity defenders. Simultaneously, GPT-5.5-Cyber has been opened for a limited preview to defenders responsible for critical infrastructure, supporting specialized cybersecurity workflows.TAC is an identity and trust-based framework aimed at ensuring that enhanced AI capabilities are wielded by verified defenders. Defenders verified through this framework will encounter fewer instances of model refusal when performing tasks such as vulnerability identification, triage, malware analysis, binary reverse engineering, and patch verification. Starting from June 1, 2026, individual members accessing this capability will be required to enable advanced account security protection.OpenAI is currently collaborating with security vendors including Cisco, CrowdStrike, and Palo Alto Networks to accelerate the defense cycle of the security ecosystem through GPT-5.5, enhancing the efficiency of vulnerability research, patching, monitoring, and supply chain security.
OpenAI Launches GPT-5.4-Cyber Model, Offering Low Refusal Capability to Security Personnel
Odaily News OpenAI announced the launch of the GPT-5.4-Cyber model. This model is fine-tuned based on GPT-5.4 for cybersecurity scenarios, reducing refusal restrictions on security-related requests under specific conditions to support professional operations such as binary reverse analysis.According to the introduction, the model is only available to vetted security vendors, enterprise security teams, and researchers through the "Trusted Access for Cybersecurity" (TAC) program. OpenAI stated that a layered mechanism will restrict the model's usage scope and impose additional constraints on access in low-visibility scenarios.
Related news
Kelp to Discontinue rsETH Cross-Chain Support on 20 Networks
: Kelp posted on X platform, stating that to ensure the security standards of rsETH and optimize network integration, it will discontinue rsETH cross-chain support for multiple networks after June 15. The affected networks include Optimism, Manta, Mode, Blast, Scroll, X Layer, zkSync, Zircuit, Swellchain, Hemi, Berachain, Sonic, HyperEVM, Unichain, TAC, Avalanche, Plasma Stable, MegaETH, Monad, and Movement.Kelp reminds users holding rsETH on the aforementioned chains to bridge it back to the Ethereum mainnet before June 15. After the deadline, asset recovery can still be requested, but a fee of 100 USDC will be charged per address. Specific procedures will be announced closer to the deadline.
Lombard Gradually Phasing Out LayerZero, Plans to Migrate Over $1 Billion in BTC Collateral Assets to Chainlink
following the $292 million exploit of Kelp DAO's LayerZero bridge, the security of cross-chain infrastructure has once again come under scrutiny. DeFi protocols Kelp DAO, Solv Protocol, Re, and crypto exchange Kraken have all taken similar migration measures, with the total value of this outflow reaching approximately $4 billion.Decentralized finance protocol Lombard has become the latest project to join the migration wave, announcing a gradual phase-out of LayerZero and the migration of over $1 billion in Bitcoin collateral assets to Chainlink's Cross-Chain Interoperability Protocol (CCIP). Bitcoin-related tokens issued by Lombard include LBTC and BTC.b. It is reported that Lombard's initial migration assets cover the Solana, Etherlink, Berachain, Corn, and TAC chains, while the use of LayerZero on Morph and Swell will also be terminated. As of now, LayerZero has not responded to requests for comment. (CoinDesk)
TAC: If Attacker Returns Approximately $2.8 Million in Assets, 10% White Hat Bounty Will Be Offered
the L1 blockchain TAC team stated they have confirmed a security incident on the cross-chain layer resulted in approximately $2.8 million in assets being transferred, involving assets such as USDT, BLUM, and tsTON.TAC stated that if the attacker returns the relevant funds to the designated multi-signature address, the team will consider this incident a "white hat rescue" and will not take legal action against the operator of the involved ETH/BSC, ZEC, and TON addresses.As a reward, the attacker can receive an approximately 10% bounty, equivalent to about 13 ETH and 300 ZEC.
TAC Cross-Chain Layer Attacked on TON Side, Suffering ~$2.8M Loss
TAC stated that its cross-chain layer on the TON side was exploited by external attackers, resulting in approximately $2.8 million in losses involving USDT, BLUM, and tsTON. TAC confirmed that the TAC token, TON, and all ERC-20 tokens bridged from Ethereum remain unaffected. The bridge has been temporarily suspended, and the team is conducting forensic analysis and implementing fixes. Additionally, the team plans to legally structure a sale of the foundation’s TAC token treasury reserves to restore bridge liquidity and compensate affected users. A post-mortem report and further details will be released within the next 48 hours.
OpenAI Launches GPT-5.5-Cyber and Deploys Trusted Access Framework for Cybersecurity
OpenAI has officially launched the GPT-5.5-Cyber model and the "Trusted Access for Cyber" (TAC) framework designed for cybersecurity defenders. Simultaneously, GPT-5.5-Cyber has been opened for a limited preview to defenders responsible for critical infrastructure, supporting specialized cybersecurity workflows.TAC is an identity and trust-based framework aimed at ensuring that enhanced AI capabilities are wielded by verified defenders. Defenders verified through this framework will encounter fewer instances of model refusal when performing tasks such as vulnerability identification, triage, malware analysis, binary reverse engineering, and patch verification. Starting from June 1, 2026, individual members accessing this capability will be required to enable advanced account security protection.OpenAI is currently collaborating with security vendors including Cisco, CrowdStrike, and Palo Alto Networks to accelerate the defense cycle of the security ecosystem through GPT-5.5, enhancing the efficiency of vulnerability research, patching, monitoring, and supply chain security.
OpenAI Launches GPT-5.4-Cyber Model, Offering Low Refusal Capability to Security Personnel
Odaily News OpenAI announced the launch of the GPT-5.4-Cyber model. This model is fine-tuned based on GPT-5.4 for cybersecurity scenarios, reducing refusal restrictions on security-related requests under specific conditions to support professional operations such as binary reverse analysis.According to the introduction, the model is only available to vetted security vendors, enterprise security teams, and researchers through the "Trusted Access for Cybersecurity" (TAC) program. OpenAI stated that a layered mechanism will restrict the model's usage scope and impose additional constraints on access in low-visibility scenarios.