ChainThink News, December 19: Aptos has announced the proposal of AIP-137, an enhancement aimed at introducing post-quantum signatures, with plans to support post-quantum digital signature schemes at the account level to mitigate long-term risks posed by the advancement of quantum computing to existing cryptographic mechanisms. The solution will be opt-in and will not affect existing accounts. According to the proposal, Aptos intends to support the hash-based signature scheme SLH-DSA, standardized under FIPS 205. (Cointelegraph)