+ o Deprecated interfaces can now be disabled at build time either
+ relative to the latest release via the "no-deprecated" Configure
+ argument, or via the "--api=1.1.0|1.0.0|0.9.8" option.
+ o Application software can be compiled with -DOPENSSL_API_COMPAT=version
+ to ensure that features deprecated in that version are not exposed.
+ o Support for RFC6698/RFC7671 DANE TLSA peer authentication
+ o Change of Configure to use --prefix as the main installation
+ directory location rather than --openssldir. The latter becomes
+ the directory for certs, private key and openssl.cnf exclusively.
+ o Reworked BIO networking library, with full support for IPv6.
+ o New "unified" build system
+ o New security levels
+ o Support for scrypt algorithm
+ o Support for X25519
+ o Extended SSL_CONF support using configuration files
+ o KDF algorithm support. Implement TLS PRF as a KDF.
+ o Support for Certificate Transparency
+ o HKDF support.
+
+ Major changes between OpenSSL 1.0.2f and OpenSSL 1.0.2g [1 Mar 2016]
+
+ o Disable weak ciphers in SSLv3 and up in default builds of OpenSSL.
+ o Disable SSLv2 default build, default negotiation and weak ciphers
+ (CVE-2016-0800)
+ o Fix a double-free in DSA code (CVE-2016-0705)
+ o Disable SRP fake user seed to address a server memory leak
+ (CVE-2016-0798)
+ o Fix BN_hex2bn/BN_dec2bn NULL pointer deref/heap corruption
+ (CVE-2016-0797)
+ o Fix memory issues in BIO_*printf functions (CVE-2016-0799)
+ o Fix side channel attack on modular exponentiation (CVE-2016-0702)
+
+ Major changes between OpenSSL 1.0.2e and OpenSSL 1.0.2f [28 Jan 2016]
+
+ o DH small subgroups (CVE-2016-0701)
+ o SSLv2 doesn't block disabled ciphers (CVE-2015-3197)