# BEP(idea) Implement EIP-2565 ModExp Gas Cost

**URL:** https://forum.bnbchain.org/t/bep-idea-implement-eip-2565-modexp-gas-cost/1257
**Category:** BEP
**Tags:** bep
**Created:** [April 17, 2023, 7:09am UTC](https://forum.bnbchain.org/t/bep-idea-implement-eip-2565-modexp-gas-cost/1257 "2023-04-17T07:09:00Z")
**Posts on this page:** 1
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### Author: ![vgg](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.bnbchain.org/vgg/32/643_2.png) [@vgg](https://forum.bnbchain.org/u/vgg)
#### Post date: [April 20, 2023, 10:58am UTC](https://forum.bnbchain.org/t/bep-idea-implement-eip-2565-modexp-gas-cost/1257/2 "2023-04-20T10:58:09Z")

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As you mentioned, EIP-2565 was introduced as part of [Berlin upgrade](https://ethereum.org/en/history/#berlin) in 2021. With regards to DoS vector mentioned in Security Considerations, were there any known issues in Ethereum following the introduction of the EIP?

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