SSL Report:
www.santeccopiadoras.com.br
(169.57.141.93)
Assessed on: Sat, 29 Nov 2025 15:27:21 UTC
| Clear cache
Summary
0
20
40
60
80
100
Certificate
Protocol Support
Key Exchange
Cipher Strength
Visit our documentation page
for more information, configuration guides, and books. Known issues are documented
here.
This server supports TLS 1.0 and TLS 1.1.
Grade capped to B. MORE INFO »
This server does not support TLS 1.3. MORE INFO »
This site works only in browsers with SNI support.
HTTP Strict Transport Security (HSTS) with long duration deployed on this server.
MORE INFO »
Certificate #1: RSA 4096 bits (SHA256withRSA)
|
Server Key and Certificate #1
|
|
| Subject |
santeccopiadoras.com.br
Fingerprint SHA256: 2ab57ef315286caa642dd664fd31597b15e2a13e1dbd8eaed66ec650842cc339 Pin SHA256: BQofd9mZnEgqEFR+uFHWaYIarGov64b43Yc9baANh6I= |
| Common names | santeccopiadoras.com.br |
| Alternative names | santeccopiadoras.com.br www.santeccopiadoras.com.br |
| Serial Number | 05e4c22220d8e0611548f0d74956f3e04116 |
| Valid from | Thu, 30 Oct 2025 21:27:41 UTC |
| Valid until | Wed, 28 Jan 2026 21:27:40 UTC (expires in 1 month and 30 days) |
| Key | RSA 4096 bits (e 65537) |
| Weak key (Debian) | No |
| Issuer | R13
AIA: http://r13.i.lencr.org/ |
| Signature algorithm | SHA256withRSA |
| Extended Validation | No |
| Certificate Transparency | Yes (certificate) |
| OCSP Must Staple | No |
| Revocation information |
CRL CRL: http://r13.c.lencr.org/23.crl |
| Revocation status | Validation error
CRL ERROR: IOException occurred |
| DNS CAA | No (more info) |
| Trusted | Yes
Mozilla Apple Android Java Windows |
Certification Paths |
Certificate #2: RSA 4096 bits (SHA256withRSA)
No SNI
|
Certification Paths |
Configuration
| Protocols | |
| TLS 1.3 | No |
| TLS 1.2 | Yes* |
| TLS 1.1 | Yes |
| TLS 1.0 | Yes* |
| SSL 3 | No |
| SSL 2 | No |
| (*) Experimental: Server negotiated using No-SNI | |
| Cipher Suites | ||
|
# TLS 1.2 (suites in server-preferred order)
|
||
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (0xc030)
ECDH secp256r1 (eq. 3072 bits RSA) FS
|
256 | |
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (0xc02f)
ECDH secp256r1 (eq. 3072 bits RSA) FS
|
128 | |
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 (0xc028)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
256 | |
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 (0xc027)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
128 | |
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
256 | |
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
128 | |
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (0xc012)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
112 | |
TLS_RSA_WITH_AES_256_GCM_SHA384 (0x9d)
WEAK
|
256 | |
TLS_RSA_WITH_AES_128_GCM_SHA256 (0x9c)
WEAK
|
128 | |
TLS_RSA_WITH_AES_256_CBC_SHA256 (0x3d)
WEAK
|
256 | |
TLS_RSA_WITH_AES_128_CBC_SHA256 (0x3c)
WEAK
|
128 | |
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)
WEAK
|
256 | |
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)
WEAK
|
128 | |
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)
WEAK
|
112 | |
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x84)
WEAK
|
256 | |
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x41)
WEAK
|
128 | |
|
# TLS 1.1 (suites in server-preferred order)
|
||
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
256 | |
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
128 | |
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (0xc012)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
112 | |
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)
WEAK
|
256 | |
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)
WEAK
|
128 | |
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)
WEAK
|
112 | |
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x84)
WEAK
|
256 | |
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x41)
WEAK
|
128 | |
|
# TLS 1.0 (suites in server-preferred order)
|
||
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA (0xc014)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
256 | |
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA (0xc013)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
128 | |
TLS_ECDHE_RSA_WITH_3DES_EDE_CBC_SHA (0xc012)
ECDH secp256r1 (eq. 3072 bits RSA) FS
WEAK
|
112 | |
TLS_RSA_WITH_AES_256_CBC_SHA (0x35)
WEAK
|
256 | |
TLS_RSA_WITH_AES_128_CBC_SHA (0x2f)
WEAK
|
128 | |
TLS_RSA_WITH_3DES_EDE_CBC_SHA (0xa)
WEAK
|
112 | |
TLS_RSA_WITH_CAMELLIA_256_CBC_SHA (0x84)
WEAK
|
256 | |
TLS_RSA_WITH_CAMELLIA_128_CBC_SHA (0x41)
WEAK
|
128 | |
| Handshake Simulation | |||
| Android 2.3.7 No SNI 2 |
Incorrect certificate because this client doesn't support SNI RSA 4096 (SHA256) | TLS 1.0 | TLS_RSA_WITH_AES_128_CBC_SHA |
||
| Android 4.0.4 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Android 4.1.1 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Android 4.2.2 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Android 4.3 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Android 4.4.2 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Android 5.0.0 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS |
| Android 6.0 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS |
| Android 7.0 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Android 8.0 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Android 8.1 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Android 9.0 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Baidu Jan 2015 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| BingPreview Jan 2015 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Chrome 49 / XP SP3 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS |
| Chrome 69 / Win 7 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Chrome 70 / Win 10 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Chrome 80 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Firefox 31.3.0 ESR / Win 7 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS |
| Firefox 47 / Win 7 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 ECDH secp256r1 FS |
| Firefox 49 / XP SP3 | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Firefox 62 / Win 7 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Firefox 73 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Googlebot Feb 2018 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| IE 7 / Vista | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| IE 8 / XP No FS 1 No SNI 2 |
Incorrect certificate because this client doesn't support SNI RSA 4096 (SHA256) | TLS 1.0 | TLS_RSA_WITH_3DES_EDE_CBC_SHA |
||
| IE 8-10 / Win 7 R | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| IE 11 / Win 7 R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| IE 11 / Win 8.1 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| IE 10 / Win Phone 8.0 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| IE 11 / Win Phone 8.1 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 ECDH secp256r1 FS |
| IE 11 / Win Phone 8.1 Update R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| IE 11 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Edge 15 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Edge 16 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Edge 18 / Win 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Edge 13 / Win Phone 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Java 6u45 No SNI 2 |
Incorrect certificate because this client doesn't support SNI RSA 4096 (SHA256) | TLS 1.0 | TLS_RSA_WITH_AES_128_CBC_SHA |
||
| Java 7u25 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA ECDH secp256r1 FS |
| Java 8u161 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Java 11.0.3 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Java 12.0.1 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| OpenSSL 0.9.8y | RSA 4096 (SHA256) | TLS 1.0 | TLS_RSA_WITH_AES_256_CBC_SHA No FS |
| OpenSSL 1.0.1l R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| OpenSSL 1.0.2s R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| OpenSSL 1.1.0k R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| OpenSSL 1.1.1c R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 5.1.9 / OS X 10.6.8 | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Safari 6 / iOS 6.0.1 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| Safari 6.0.4 / OS X 10.8.4 R | RSA 4096 (SHA256) | TLS 1.0 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA ECDH secp256r1 FS |
| Safari 7 / iOS 7.1 R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| Safari 7 / OS X 10.9 R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| Safari 8 / iOS 8.4 R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| Safari 8 / OS X 10.10 R | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 ECDH secp256r1 FS |
| Safari 9 / iOS 9 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 9 / OS X 10.11 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 10 / iOS 10 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 10 / OS X 10.12 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 12.1.2 / MacOS 10.14.6 Beta R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Safari 12.1.1 / iOS 12.3.1 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Apple ATS 9 / iOS 9 R | RSA 4096 (SHA256) | TLS 1.2 > http/1.1 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| Yahoo Slurp Jan 2015 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
| YandexBot Jan 2015 | RSA 4096 (SHA256) | TLS 1.2 | TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 ECDH secp256r1 FS |
|
# Not simulated clients (Protocol mismatch)
|
|||
| IE 6 / XP No FS 1 No SNI 2 |
Protocol mismatch (not simulated) |
||
| (1) Clients that do not support Forward Secrecy (FS) are excluded when determining support for it. | |||
| (2) No support for virtual SSL hosting (SNI). Connects to the default site if the server uses SNI. | |||
| (3) Only first connection attempt simulated. Browsers sometimes retry with a lower protocol version. | |||
| (R) Denotes a reference browser or client, with which we expect better effective security. | |||
| (All) We use defaults, but some platforms do not use their best protocols and features (e.g., Java 6 & 7, older IE). | |||
| (All) Certificate trust is not checked in handshake simulation, we only perform TLS handshake. | |||
| Protocol Details | |
| Secure Renegotiation | Supported |
| Secure Client-Initiated Renegotiation | No |
| Insecure Client-Initiated Renegotiation | No |
| BEAST attack |
Not mitigated server-side (more info)
TLS 1.0: 0xc014
|
| POODLE (SSLv3) | No, SSL 3 not supported (more info) |
| POODLE (TLS) | No (more info) |
| Zombie POODLE | No (more info)
TLS 1.2 : 0xc027
|
| GOLDENDOODLE | No (more info)
TLS 1.2 : 0xc027
|
| OpenSSL 0-Length | No (more info)
TLS 1.2 : 0xc027
|
| Sleeping POODLE | No (more info)
TLS 1.2 : 0xc027
|
| Downgrade attack prevention | Yes, TLS_FALLBACK_SCSV supported (more info) |
| SSL/TLS compression | No |
| RC4 | No |
| Heartbeat (extension) | Yes |
| Heartbleed (vulnerability) | No (more info) |
| Ticketbleed (vulnerability) | No (more info) |
| OpenSSL CCS vuln. (CVE-2014-0224) | No (more info) |
| OpenSSL Padding Oracle vuln. (CVE-2016-2107) |
No (more info) |
| ROBOT (vulnerability) | No (more info) |
| Forward Secrecy | With modern browsers (more info) |
| ALPN | Yes http/1.1 |
| NPN | Yes http/1.1 |
| Session resumption (caching) | Yes |
| Session resumption (tickets) | Yes |
| OCSP stapling | No |
| Strict Transport Security (HSTS) | Yes
max-age=31536000; includeSubDomains; preload |
| HSTS Preloading | Not in: Chrome Edge Firefox IE |
| Public Key Pinning (HPKP) | No (more info) |
| Public Key Pinning Report-Only | No |
| Public Key Pinning (Static) | No (more info) |
| Long handshake intolerance | No |
| TLS extension intolerance | No |
| TLS version intolerance | No |
| Incorrect SNI alerts | No |
| Uses common DH primes | No, DHE suites not supported |
| DH public server param (Ys) reuse | No, DHE suites not supported |
| ECDH public server param reuse | No |
| Supported Named Groups | secp256r1, secp521r1, brainpoolP512r1, brainpoolP384r1, secp384r1, brainpoolP256r1, secp256k1, sect571r1, sect571k1, sect409k1, sect409r1, sect283k1, sect283r1 (server preferred order) |
| SSL 2 handshake compatibility | Yes |
|
HTTP Requests
|
|
1 https://www.santeccopiadoras.com.br/
(HTTP/1.1 200 OK)
| 1 | |
| Server | nginx | |
| Date | Sat, 29 Nov 2025 15:24:24 GMT | |
| Content-Type | text/html; charset=UTF-8 | |
| Content-Length | 522690 | |
| Connection | close | |
| Strict-Transport-Security | max-age=31536000; includeSubDomains; preload | |
| X-Frame-Options | SAMEORIGIN | |
| Set-Cookie | PHPSESSID=lhqih0cr8ujh7ilnisvbve1ql3; path=/ | |
| Expires | Thu, 19 Nov 1981 08:52:00 GMT | |
| Cache-Control | no-store, no-cache, must-revalidate | |
| Pragma | no-cache | |
| Vary | Accept-Encoding,User-Agent | |
| X-Content-Type-Options | nosniff | |
| X-XSS-Protection | 1; mode=block | |
| Content-Language | pt-BR | |
| Miscellaneous | |
| Test date | Sat, 29 Nov 2025 15:24:10 UTC |
| Test duration | 191.314 seconds |
| HTTP status code | 200 |
| HTTP server signature | nginx |
| Server hostname | 5d.8d.39a9.ip4.static.sl-reverse.com |
SSL Report v2.4.1