Explore a conference talk from Asiacrypt 2020 that presents a paper on succinct and adaptively secure Attribute-Based Encryption (ABE) for arithmetic branching programs from k-Lin. Delve into the framework proposed by Lin and Luo, which builds upon previous work from Eurocrypt. Learn about key concepts such as adaptive IND-CPA security, arithmetic key garbling schemes, and inner-product functional encryption. Examine the modified proof techniques with less hardwiring and simulation security. Gain insights into piecewise security, special simulation structures, and gradual simulation security as applied to ABE schemes.