we dont want our members to go through other details which is unimportant for them
Hi @juhi awtani - welcome to the Community!
Unfortunately Trello does not support per-card permissions - Trello's vision is to provide teams with a shared perspective, and this shared perspective is lost if certain team members can view some cards but not all.
We do have a feature request open for this though, I recommend voting for / watching / commenting on this request at https://jira.atlassian.com/browse/TRELLO-98
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