# 202207

## DH-group/cypher suites/strongswan config
```
DH-group/cypher suites/strongswan config/remarks
group1 / 768-bit Modular Exponential (MODP) algorithm.
group2 / 1024-bit MODP algorithm.
group5 / 1536-bit MODP algorithm.
group14 / 2048-bit MODP group.
group15 / 3072-bit MODP algorithm.
group16 / 4096-bit MODP algorithm.
group19 / 256-bit random Elliptic Curve Groups modulo a Prime (ECP groups) algorithm.
group20 / 384-bit random ECP groups algorithm.
group21 / 521-bit random ECP groups algorithm.
group24 / 2048-bit MODP Group with 256-bit prime order subgroup.
```
- We recommend that you use group14, group15, group16, group19, group20, or group21 instead of group1, group2, or group5.
- ref: [dh-group (Security IKE) | Junos OS | Juniper Networks](https://www.juniper.net/documentation/us/en/software/junos/vpn-ipsec/topics/ref/statement/security-edit-dh-group.html)

## [リアルタイム共同編集のアルゴリズム (Operational Transformation; OT) を理解する試み – RORO](https://ciscorn.net/2021/08/30/ot/)
- [I was wrong. CRDTs are the future](https://josephg.com/blog/crdts-are-the-future/)

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## MX ANYWHERE 3の静音化
- [テレワーク環境改善計画 ― マウス編：MX Master 3 / MX ANYWHERE 3 のうるさいクリック音を静音化。 : おShinoブ](http://blog.livedoor.jp/shino_b/archives/10356201.html)
- [Logi MX anywhere 3 クリック静穏化 | らてろぐ](https://ratelog.net/noise-reduction-logi-mx-anywhere3/)

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## [CLASSIC BT - ESP32 -  — ESP-IDF Programming Guide latest documentation](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/bluetooth/classic_bt.html)

## 前方参照と後方参照
- 前方参照: (?=)
  - ex: ABCD => AB(?=CD) (match: AB)
- 否定的前方参照: (?!)
  - ex: ABCE => AB(?=CD) (match: AB)
- 後方参照: (?>=)
  - ex: ABCD => (?<=AB)CD (match: CD)
- 否定的後方参照: (?<!)
  - ex: AACD => (?<!AB)CD (match: CD)