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Junyoung Park

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#artificial intelligence Preprint Sep 2026

ValueDiff: Value-Geometric KV Cache Eviction for Sink-Suppressed LLMs

ValueDiff, a value-geometric eviction that ranks tokens by the L2 deviation of their value vectors from the cache mean, is presented, and value geometry emerges as the more reliable query-invariant eviction signal for sink-suppressed models.

Junyoung Park, Jungwook Choi, Min-Gu Lee · 0 citations
Jul 2026

MJ: Multi-turn LLM Jailbreaking via Decomposed Credit Assignment

Modern large language models (LLMs) operate in interactive multi-turn settings, making multi-turn jailbreaking a realistic threat model and an important setting for automated red teaming. A core challenge in learning multi-turn jailbreak attackers is credit assignment: different turns contribute differently to the fina...

Junyoung Park, N. Park, Sechan Lee et al. · 0 citations

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