Amazon S3 storage without access key / encrypted access key

Hello,

I have been working on a dam system which requires several assets to be published everyday. Keen to explore the S3 data store for storing the binaries. I have run into a road block where the organization is reluctant to hand over the secret /acess key for S3 configurations.

Is there are way around it? Can i use encrypted key / not use the key at all and yet being able to publish the assets etc.

Thanks for your help